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AmazingRobie

macrumors 6502
Original poster
Jun 10, 2009
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Hello. Recently (received last week) purchased a 2010 MacPro 5,1 online. There are two GPUs installed, a AMD Radeon 5770 (slot 1) and AMD Radeon RX 580 Pulse (slot 3, i believe, not sure its taking up 2 slots so it maybe slot 2, but its right above the 5770). Both GPUs appear to be new.

I've taken the Sapphire out and tested just the 5770 with AHT and all of the board slots do not throw any error messages. It states "No trouble found".

When I add the Sapphire back into the mix in either of the slots, AHT throws the error '4SNS/1/C0000008: Te2S--124', which I've read here: https://www.cnet.com/news/how-to-invoke-and-interpret-the-apple-hardware-tests/ is a bus temp sensor.

My question is this, is the error being given due to the card not being natively supported for the test or does it sound like something is wrong with the card?

The last thing is that theres a weird graphical glitch (see attached image) which happens during shutdown, every time so its reproducible, but otherwise the card seems solid. The glitch looks like a bunch of rows of shimmery white specs. I've run LuxMark, Geekbench, etrecheck, and theres no GPU errors. I have not installed FCPX and started actually using the card yet, because I wanted to thoroughly test out the machine before setting everything up/installing all the software.

Thanks in advance for any input.

Screen Shot 2018-09-05 at 4.45.31 PM.png

**Also, Also, the place with which I purchased it said that they'll take the Sapphire back if I do not feel comfortable with it, so I was thinking that if it seems like to anyone here that there may be an issue, which card is better for a replacement and do they use the same power cables out of these two.

Replacement for current Pulse RX 580, right now it seems like its using an 8-pin connector:
https://www.amazon.com/Sapphire-11265-05-20G-Backplate-Graphics-Graphic/dp/B06ZZ6FMF8

Alternative Nitro+ RX 580, would it just be swapping the card and using the same 8-pin power cable?
https://www.amazon.com/gp/product/B071QX74F9/ref=ox_sc_act_title_1?smid=A23NVCSO4PYH3S&psc=1
 
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View attachment 779867 Hello. Recently (received last week) purchased a 2010 MacPro 5,1 online. There are two GPUs installed, a AMD Radeon 5770 (slot 1) and AMD Radeon RX 580 Pulse (slot 3, i believe, not sure its taking up 2 slots so it maybe slot 2, but its right above the 5770). Both GPUs appear to be new.

I've taken the Sapphire out and tested just the 5770 with AHT and all of the board slots do not throw any error messages. It states "No trouble found".

When I add the Sapphire back into the mix in either of the slots, AHT throws the error '4SNS/1/C0000008: Te2S--124', which I've read here: https://www.cnet.com/news/how-to-invoke-and-interpret-the-apple-hardware-tests/ is a bus temp sensor.

My question is this, is the error being given due to the card not being natively supported for the test or does it sound like something is wrong with the card?

The last thing is that theres a weird graphical glitch (see attached image) which happens during shutdown, every time so its reproducible, but otherwise the card seems solid. The glitch looks like a bunch of rows of shimmery white specs. I've run LuxMark, Geekbench, etrecheck, and theres no GPU errors. I have not installed FCPX and started actually using the card yet, because I wanted to thoroughly test out the machine before setting everything up/installing all the software.

Thanks in advance for any input.

View attachment 779869

**Also, Also, the place with which I purchased it said that they'll take the Sapphire back if I do not feel comfortable with it, so I was thinking that if it seems like to anyone here that there may be an issue, which card is better for a replacement and do they use the same power cables out of these two.

Replacement for current Pulse RX 580, right now it seems like its using an 8-pin connector:
https://www.amazon.com/Sapphire-11265-05-20G-Backplate-Graphics-Graphic/dp/B06ZZ6FMF8

Alternative Nitro+ RX 580, would it just be swapping the card and using the same 8-pin power cable?
https://www.amazon.com/gp/product/B071QX74F9/ref=ox_sc_act_title_1?smid=A23NVCSO4PYH3S&psc=1

*** STOP using your RX580 like this, you should not power it by a single mini 6pin, that's way outside the mini 6pin's spec ***

1) Your RX580 is in slot 2

2) You can't replace the PULSE by the Nitro+. Nitro+ is a 2.2 slots wide card, not 2.0 slot. It will block the slot 4. And obviously you have a card in slot 4 right now. (And the Nitro+ will draw even more power from the 8pin)

3) You cMP is working correctly. AHT was built about 7 years before the RX580 exist. It's impossible to support the RX580. Unable to understand some sensor's reading is somehow normal.

4) Can you remove the 5770 and only use the RX580? If yes, the glitch during shutdown still there?

N.B. Your card seems works fine is just because you are lucky. And those benchmarks are not stressful enough. If you fun Furmark, your cMP should shutdown straight away due to overload the mini 6pin. Each mini 6pin can only practically deliver up to around 120W. And the PULSE RX580 can draw 150W from the 8pin under real high stress. Which will trigger the cMP's shutdown protection.
 
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*** STOP using your RX580 like this, you should not power it by a single mini 6pin, that's way outside the mini 6pin's spec ***

I received the GPU that way from the seller. It's an 8-pin connector not a 6-pin, unless I'm mistaken. or are you stating that it's a 6-pin on the board, not the cabling part going into the card?

1) Your RX580 is in slot 2
Okay, thanks for that.

2) You can't replace the PULSE by the Nitro+. Nitro+ is a 2.2 slots wide card, not 2.0 slot. It will block the slot 4. And obviously you have a card in slot 4 right now.
Okay. Good to know, but if I can just use one card since from what I've been reading FCPX can only utilize one card at a time, I can take the 5770 out and use the Nitro+ if its a more powerful card than this Pulse.

3) You cMP is working correctly. AHT was builded about 7 years before the RX580 exist. It's impossible to support RX580.
So what you are saying is that the AHT temp error '4SNS/1/C0000008: Te2S--124', can be ignored and that there is no danger, its just unsupported?

4) Can you remove the 5770 and only use the RX580? If yes, the glitch during shutdown still there?
I will try that and let you know.
 
The graphical glitches (artifacts) are common in High Sierra with AMD GPU's. I've had several and it's VERY common. It's a driver issue, not a hardware issue AFAIK.

You need to power that RX580 card with a cable that connects both mini-6 pin power connectors on the logic board, to ONE 8-pin GPU connector. It's a Y cable. Use one unless you want to eventually ruin your MacPro.
 
I've also observed these glitches during shutdown. Sometimes I get a white block in the top left corner. Since the card runs great, I think it's a nonissue.

Absolutely! I've seen this exact glitch, come and go over the years with different macOS versions using AMD GPU's. I've even seen it in Linux when ATI (aka AMD) would release a new driver.
That's why I feel it's a driver quality issue. It never hurts a thing (except maybe your feelings) ;)
 
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I received the GPU that way from the seller. It's an 8-pin connector not a 6-pin, unless I'm mistaken. or are you stating that it's a 6-pin on the board, not the cabling part going into the card?

Correct, I was talking about the "mini 6pin" (not normal 6pin anyway) that only exist on the cMP's logic board in your case.

Mini 6pin is rated up to 75W. Real world testing shows can deliver up to ~120W (already exceed the official limit). And your GPU's 8pin can pull 150W (way outside the mini 6pin can deliver).

Okay. Good to know, but if I can just use one card since from what I've been reading FCPX can only utilize one card at a time, I can take the 5770 out and use the Nitro+ if its a more powerful card than this Pulse.

FCPX can utilise multiple GPU. But the 5770 is way too weak, can't help much anyway, better to take it out. So that you can use both mini 6pins to power the RX580's 8pin. Also, can let the RX580 has better cooling, less chance of having thermal throttling.

Nitro+ is just a bit faster than PULSE, not worth to use it if it block an extra PCIe slot. Anyway, I can make the PULSE run 20% faster. That should be faster than the Nitro+ native boost mode. The post is here.

https://forums.macrumors.com/threads/sapphire-pulse-rx580-8gb-vbios-study.2133607/

So what you are saying is that the AHT temp error '4SNS/1/C0000008: Te2S--124', can be ignored and that there is no danger, its just unsupported?

Correct. You should only run AHT with stock hardware, anything more than that may cause erroneous result.

Anyway, do you know that you can slide the PCIe fan to the right? Your GPU is not "unlocked". I am not sure if you are working on it. Or you don't know about it (sounds like you are a new cMP owner, and I bet you haven't read any cMP manual yet)
 
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Correct, I was talking about the "mini 6pin" (not normal 6pin anyway) that only exist on the cMP's logic board in your case.

Mini 6pin is rated up to 75W. Real world testing shows can deliver up to ~120W (already exceed the official limit). And your GPU's 8pin can pull 150W (way outside the mini 6pin can deliver).



FCPX can utilise multiple GPU. But the 5770 is way too weak, can't help much anyway, better to take it out. So that you can use both mini 6pins to power the RX580's 8pin. Also, can let the RX580 has better cooling, less chance of having thermal throttling.

Okay, I just got a response from the seller and they stated that the 6pin power supply should be sufficient for this model of graphics card. The system has a warranty, so I'm not sure how to handle this. Is there a danger of routing the power supply of both 6pin connectors to an 8pin into the video card? Will it overpower it or will it only draw what is necessary for operation?


Nitro+ is just a bit faster than PULSE, not worth to use it if it block an extra PCIe slot. Anyway, I can make the PULSE run 20% faster. That should be faster than the Nitro+ native boost mode. The post is here.

https://forums.macrumors.com/threads/sapphire-pulse-rx580-8gb-vbios-study.2133607/
Going to check this out.

Correct. You should only run AHT with stock hardware, anything more than that may cause erroneous result.
Fantastic. That solves that mystery.

Anyway, do you know that you can slide the PCIe fan to the right? Your GPU is not "unlocked". I am not sure if you are working on it. Or you don't know about it (sounds like you are a new cMP owner, and I bet you haven't read any cMP manual yet)
Yes. I've been taking the cards out and trying them in different slots all day. I forgot to lock it back into place.

If there's no danger in using the power from both 6pins and taking the 5770 out, can you help me find the correct cabling options at frys so I can pick them up tomorrow? Here is the link: https://www.frys.com/search?search_...tring=dual+6pin+to+8pin&nearbyStoreName=false

Thanks.
 
Here’s the cable. You can source it at other places too. I.E. Amazon/eBay...

https://www.aliexpress.com/item/Dua...322.html?spm=a2g0s.9042311.0.0.507b4c4duzZ2gP

You can't happen to find one here at frys.com or microcenter.com can you?

https://www.frys.com/ http://www.microcenter.com/

I'd like to get it tomorrow and be able to return if it doesn't work out.

Thanks for the suggestion. There's no danger in utilizing the power from both outlets to one device is there?
 
Here’s the cable. You can source it at other places too. I.E. Amazon/eBay...

https://www.aliexpress.com/item/Dua...322.html?spm=a2g0s.9042311.0.0.507b4c4duzZ2gP
I've been researching this dual 6pin to 8pin business everywhere on the internet and there's people who state that they've done damage to their systems by using these. The cable that you sent me the link to was the correct cable to use for this right?

There's this guy syops posting everywhere on the internet that a single 6 to 8pin is fine and another person jamesy829 on this thread here: (https://forums.macrumors.com/threads/mac-pro-4-1-and-5-1-pcie-aux-power.2035519/page-4) who's saying that he fried his card and motherboard with a dual 6 to 8pin cable. I just bought this computer and don't want anything like that to happen.

Please confirm for me that this is the correct cable for this card (see amazon link) on a mid 2010 macpro 5,1 model, 2 x 3.33GHz Intel Xeon 6 core “Westmere”, MC561LL/A-CTO (12-core).
Card is here: https://www.amazon.com/Sapphire-11265-05-20G-Backplate-Graphics-Graphic/dp/B06ZZ6FMF8 .
 
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I've been researching this dual 6pin to 8pin business everywhere on the internet and there's people who state that they've done damage to their systems by using these. The cable that you sent me the link to was the correct cable to use for this right?

There's this guy syops posting everywhere on the internet that a single 6 to 8pin is fine and another person jamesy829 on this thread here: (https://forums.macrumors.com/threads/mac-pro-4-1-and-5-1-pcie-aux-power.2035519/page-4) who's saying that he fried his card and motherboard with a dual 6 to 8pin cable. I just bought this computer and don't want anything like that to happen.

Please confirm for me that this is the correct cable for this card (see amazon link) on a mid 2010 macpro 5,1 model, 2 x 3.33GHz Intel Xeon 6 core “Westmere”, MC561LL/A-CTO (12-core).
Card is here: https://www.amazon.com/Sapphire-11265-05-20G-Backplate-Graphics-Graphic/dp/B06ZZ6FMF8 .

If you want a cable faster you can order from Amazon. They have them in stock.
 
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Okay, I just got a response from the seller and they stated that the 6pin power supply should be sufficient for this model of graphics card. The system has a warranty, so I'm not sure how to handle this. Is there a danger of routing the power supply of both 6pin connectors to an 8pin into the video card? Will it overpower it or will it only draw what is necessary for operation?

Easy, run Furmark stress test for 15min. And you will know the answer.

If no shutdown, then I will say the mini 6pin is supplying enough power for this setup. But I won't call it "safe", it's literally way outside the limit. Technically it can burn the traces on the logic board, if you are lucky enough, then nothing will happen for years. But in worse case, it can kill the logic board or even catch fire. How much warranty they give you? Years?

If shutdown, then obviously it's not safe (and not working well).
 
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This is a classic case of the blind leading the blind, the seller is wrong, and although under warranty if that's how he treats his machines for sale I sure wouldn't buy one from him. dual 6 pin mini to 8 pin is the requirement for the pulse RX580 1 single 6 pin to 8 is no good and if not now in the future it will all go wrong. and damage will be done to the logic board.

A good quality dual mini 6 pin to 8 pin is required and remove the 5770 you don't need it. I am surprised it hasn't damaged it already!
 
The only difference between the dual 6 pin to 8 pin y cable and dual 6 pin cables is the obvious. Your video card still needs external power to operate correctly. My GTX680 needs (2) 6 pin to 6 pin cables to operate. The single cable may be fine for everyday tasks but as stated if you start putting a load on it where it needs more power your machine will hopefully just shutdown, worst case as stated the extra current draw from the video card will cause your machine to burn up. The card draws about 185 watts. You get roughly 75 watts from the PCI buss. You need to make up the other wattage from the 6 pin connectors on the board. Each of those connectors are about 65 watts I think so. So using the setup you have now you are only supplying about 140 watts. If the card needs more it will try to draw more and overload not only the 6 pin cable but the PCI buss as well. Poof there goes your new machine. Just because it is working like it is doesn't make it right. Look up the power specs for that card. Just a quick look and from what I found it requires at least 185 watts of power.
 
The only difference between the dual 6 pin to 8 pin y cable and dual 6 pin cables is the obvious. Your video card still needs external power to operate correctly. My GTX680 needs (2) 6 pin to 6 pin cables to operate. The single cable may be fine for everyday tasks but as stated if you start putting a load on it where it needs more power your machine will hopefully just shutdown, worst case as stated the extra current draw from the video card will cause your machine to burn up. The card draws about 185 watts. You get roughly 75 watts from the PCI buss. You need to make up the other wattage from the 6 pin connectors on the board. Each of those connectors are about 65 watts I think so. So using the setup you have now you are only supplying about 140 watts. If the card needs more it will try to draw more and overload not only the 6 pin cable but the PCI buss as well. Poof there goes your new machine. Just because it is working like it is doesn't make it right. Look up the power specs for that card. Just a quick look and from what I found it requires at least 185 watts of power.

Some extra info.

That PULSE RX580 can really draw 225W under real high stress.
1366-furmark-jpg.777277


And 190W under normal high stress.
1366-valley-jpg.777279


However, when it draw 185W, it will only get ~60W from the PCIe slot. The remaining ~120W will be from the 8pin. The card's won't always draw 75W automatically from the slot. That's a very common false assumption.

Form OP's description, the most demanding apps he ran so far is just Luxmark, which should draw even less than Unigine Valley. Which eventually make the card draw just a bit less than 120W from the 8pin. And just low enough to avoid trigger the shutdown protection.
 
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AmazingRobie

In all honesty, you took it for granted ( without Googling) that you could run two GPU's ( one now ancient = 5770 ) and one brand new without addressing nor researching each GPU's power demands on your cMP.

Learn how much power one or two SATA ports can supply. ( Write that info down somewhere )

Learn how much 2 mini-6 pin's can supply TO one 8 pin ( ditto above )

Now total up how much power is required for two cards. . and . . how much your cMP can actually ( SAFELY ) supply.

= cable/port juggling

We all had to do this.
 
AmazingRobie

In all honesty, you took it for granted ( without Googling) that you could run two GPU's ( one now ancient = 5770 ) and one brand new without addressing nor researching each GPU's power demands on your cMP.
You're kidding right? I googled every day for two weeks straight and got drowned in the sea of data on forums from people just like here saying one thing and blogposts of other people saying something else and video comments and just everyone commenting like they know better than someone else. To say I just googled something is an understatement of massive proportions.

However, that said, I'm not a freakin electrician and I'm certainly not an Apple engineer, which I would probably guess most of the people here are not as well. The specs on this card are <225W from the website. http://www.sapphiretech.com/productdetial.asp?pid=77B48A1E-9FCB-4F19-BC2D-17C3087E4852&lang=eng

Learn how much 2 mini-6 pin's can supply TO one 8 pin ( ditto above )

I'm far from an illiterate, but like I said, I'm neither an electrician nor an engineer. The highest math I has taken was Algebra and Geometry. I have tried to comprehend all of the diagrams and schematics of the various parts posted on this and other forums in regard to the pin connectors and its all Greek to me. But I do not care that I don't understand. All I want is some straight information regarding how I can not damage this machine so I can use it with this card.

The additional 5770 card is for boot support. I was going to leave it in the machine for EFI screen boot support, and I have no need for an additional card since FCPX will not utilize it (from what I've read online, again others have contradicted this statement, so I'm not even sure that's accurate, but I do not give a s really.)

From what I gather, the bus supplies up to 75w max and one 6pin connector supplies up to 125w, so in my head, unless I'm calculating that incorrectly or misunderstanding the way those two numbers add together, thats a total of 200 watts which is less than the <225W it states in the specs. So if I use this cable (see following link) which has been suggested and I've already purchased, https://www.aliexpress.com/item/Dua...322.html?spm=a2g0s.9042311.0.0.507b4c4duzZ2gP , I should have the up to 125 watt times two (125x2=250W) from both 6pin mainboard connectors and the up to 75W from the bus for a total of up to 325 watts. Is this correct or am I misunderstanding the way these amounts add together?

Since the cards specs state <225 and theres ≤325W coming from the bus and both 6pins into the 8pin, into the card, that's 100 more watts than needed, correct? Also, if that's more watts than needed wont that be a problem or does the bus and the pin connectors regulate how much is drawn into the actual card.

See these are the questions which need answers, but if you look online, you'll find contradictory beliefs about what the answer is, so who to believe since I don't know who actually has the knowledge and who is just regurgitating something they've read somewhere else.
 
You're kidding right? I googled every day for two weeks straight and got drowned in the sea of data on forums from people just like here saying one thing and blogposts of other people saying something else and video comments and just everyone commenting like they know better than someone else. To say I just googled something is an understatement of massive proportions.

However, that said, I'm not a freakin electrician and I'm certainly not an Apple engineer, which I would probably guess most of the people here are not as well. The specs on this card are <225W from the website. http://www.sapphiretech.com/productdetial.asp?pid=77B48A1E-9FCB-4F19-BC2D-17C3087E4852&lang=eng



I'm far from an illiterate, but like I said, I'm neither an electrician nor an engineer. The highest math I has taken was Algebra and Geometry. I have tried to comprehend all of the diagrams and schematics of the various parts posted on this and other forums in regard to the pin connectors and its all Greek to me. But I do not care that I don't understand. All I want is some straight information regarding how I can not damage this machine so I can use it with this card.

The additional 5770 card is for boot support. I was going to leave it in the machine for EFI screen boot support, and I have no need for an additional card since FCPX will not utilize it (from what I've read online, again others have contradicted this statement, so I'm not even sure that's accurate, but I do not give a s really.)

From what I gather, the bus supplies up to 75w max and one 6pin connector supplies up to 125w, so in my head, unless I'm calculating that incorrectly or misunderstanding the way those two numbers add together, thats a total of 200 watts which is less than the <225W it states in the specs. So if I use this cable (see following link) which has been suggested and I've already purchased, https://www.aliexpress.com/item/Dua...322.html?spm=a2g0s.9042311.0.0.507b4c4duzZ2gP , I should have the up to 125 watt times two (125x2=250W) from both 6pin mainboard connectors and the up to 75W from the bus for a total of up to 325 watts. Is this correct or am I misunderstanding the way these amounts add together?

Since the cards specs state <225 and theres ≤325W coming from the bus and both 6pins into the 8pin, into the card, that's 100 more watts than needed, correct? Also, if that's more watts than needed wont that be a problem or does the bus and the pin connectors regulate how much is drawn into the actual card.

See these are the questions which need answers, but if you look online, you'll find contradictory beliefs about what the answer is, so who to believe since I don't know who actually has the knowledge and who is just regurgitating something they've read somewhere else.


amazing Robbie, quoted is max figure 125w from each mini 6 pin 75w max pcie, so if you run your car at max revs how long do you think that engine will last? safe parameters need to be taken, Mini 6 pin 90w each =180 + 35w from PCIe is the safe bet, not the configuration that your Mac Pro was sold to you in. run like that your Mac Pro will last a long time.
 
amazing Robbie, quoted is max figure 125w from each mini 6 pin 75w max pcie, so if you run your car at max revs how long do you think that engine will last? safe parameters need to be taken, Mini 6 pin 90w each =180 + 35w from PCIe is the safe bet, not the configuration that your Mac Pro was sold to you in. run like that your Mac Pro will last a long time.
I don't understand all of this gobbledygook you just wrote, man. Why can't you just explain something in plain english. Will that card be fine powered by that cable in the link safely and not be overloaded or not. Geez, why does everybody got to make things so complicated for people just looking for a straight answer. Where are you getting the 90w coming from the mini 6pin from, is that something I have to manage the wattage with software or is there a special 90W max cable or will the card or computer self regulate the watts coming through the cable to the card.

I'm not trying to be rude guy, but seriously, I'm scared, worried and confused all at the same time. The machine has only been turned on a few times since I got it and I was mostly using the 5770 for video output while running the tests.
 
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I don't understand all of this gobbledygook you just wrote, man. Why can't you just explain something in plain english. Will that card be fine powered by that cable in the link safely and not be overloaded or not. Geez, why does everybody got to make things so complicated for people just looking for a straight answer. Where are you getting the 90w coming from the mini 6pin from, is that something I have to manage the wattage with software or is there a special 90W cable or will the card or computer self regulate the watts coming through the cable to the card.

I'm not trying to be rude guy, but seriously, I'm scared, worried and confused all at the same time. The machine has only been turned on a few times since I got it and I was mostly using the 5770 for video output while running the tests.

The whole reason is trying to explain how a system draws its power, just because it says 125w max does not mean its delivering 125w the idea is the spread the load over 2 mini 6 pins and PCIe.

the cable you bought is the right one. use only the RX580 you don't need the 5770 as well and enjoy your Mac.
 
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If you keep up with that demanding tone, you are unlikely to get any further help. These people are going out of their way to not only answer your questions, but patiently explain how it works so you can better understand how to create a stable system. You may be frustrated because it's complex, but please don't take it out on them.
 
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If you keep up with that demanding tone, you are unlikely to get any further help. These people are going out of their way to not only answer your questions, but patiently explain how it works so you can better understand how to create a stable system. You may be frustrated because it's complex, but please don't take it out on them.
You're right.

I'M SORRY TO EVERYONE.

My bad. I'm just tired and frustrated from reading contradictory statements and ending right back up where I started, without getting any definitive answers.
 
@AmazingRobie

The cable I linked to is safe.

If you want a safe plug-n-play solution, without doing your own research, then just get the cable and move on. It's really simple and not worth all the frustrations. This is a solid solution, no need to read and stress about all the other crap you're reading on various websites.
 
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