Late 2008 Macbook Pro Overclock [ UPDATED ]

[lscangus]

Updated story

2.8 CTO MBP Later 2008, Overclocked to 3.25Ghz but i found out that the CPU actually throttles back, so basically it is overheated, so i decided to run a Test without overclocking, and it appears to me the MBP actually overheat without overclocking. So please Users, please post your idle temp of your CPU and do a test with prime95 and CoreTemp, so see whether your MBP actually throttles, if it does, then the thermal system on your MBP has a little bit of problem like mine does.

My MBP CPU temp can reach 107'C in MacOSX.

Angus

 

[Essjay]

2.8 CTO MBP Later 2008

Running at 3.25 GHZ stable in Windows using nTune Software.

Now is there any way to get this thing flying in macosx?

Any developers here can find the code to over-clock the CPU and GPU?

This thing screams at 3.25Ghz

Angus

Temps?

 

[thechidz]

what do you mean by screams exactly? hd video encoding times?

 

[fleshman03]

what do you mean by screams exactly? hd video encoding times?

It literally screams from the burns it's acquiring.

 

[Eddyisgreat]

Use rivatuner to overclock the GPU.

CPU and GPU are controlled by OS X. Overclocking really has never been a serious offering in the mac world due to lack of interchangable parts or general need

 

[J the Ninja]

1. Pics or it didn't happen.

2. Temps?

3. What clock settings? Are you using 310Mhz x 10.5, or something else?

 

[Eidorian]

2.8 CTO MBP Later 2008

Running at 3.25 GHZ stable in Windows using nTune Software.

Now is there any way to get this thing flying in macosx?

Any developers here can find the code to over-clock the CPU and GPU?

This thing screams at 3.25Ghz

Angus

CoreTemp, CPU-Z, and HWMonitor pics NOW.

 

[LoneWolf121188]

^^ A 425MHz OC on a Core 2? If it were a desktop chip, I'd consider that modest. It being a mobile chip, I'll believe it.

Overclocking really has never been a serious offering in the mac world due to lack of interchangable parts or general need

I beg to differ. A modest 10% OC could reduce rendering time for a scene from 10 hours to 9 hours in FCP. That's huge. It's never been a serious offering because nobody has bothered to write an app to do it. Generally speaking, the people who write those apps are gamers, and since OS X is not the OS of choice for gamers, no one will take the time to figure out how to write an OS X OCing app.

 

[G4DP]

I've OC'd my Mac Pro from 2.8Ghz to 3.25Ghz. Using the tool from ZDnet.

Does work trying to find a tool to prove it, but there isn't CPU speed checker for Mac that I can easily find.

 

[andiwm2003]

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This thing screams at 3.25Ghz

Angus

at 3.25GHz it's a 16% increase in speed assuming the increase in GHz fully translates in real world speed.

16% difference can hardly be called "it screams".

In real life you won't notice that difference for the most part because memory, GPU, HD are the same.

in transcoding it means a 1 hr task is done at best in 52 min.

all in all not worth the trouble unless you're transcoding/rendering for money. but then you would invest money in a octocore mac pro and overclock that.

 

[Eddyisgreat]

I beg to differ. A modest 10% OC could reduce rendering time for a scene from 10 hours to 9 hours in FCP. That's huge. It's never been a serious offering because nobody has bothered to write an app to do it. Generally speaking, the people who write those apps are gamers, and since OS X is not the OS of choice for gamers, no one will take the time to figure out how to write an OS X OCing app.

???

That's what I said. Gaming has always been the main catalyst for enhancing performance and most FCP users won't know how to code or general GPU programming anyway.

I personally would overclock my machine for After Effects work but it's not that big of a deal (yet).

 

[J the Ninja]

Meh, IMO, a big part of overclocking is just the fun of seeing how far you can push it. It really doesn't make that big of a speed difference, but it is definitely fun to do.

 

[Eidorian]

Meh, IMO, a big part of overclocking is just the fun of seeing how far you can push it. It really doesn't make that big of a speed difference, but it is definitely fun to do.

Not to mention overclocking my 3850 to 770 MHz core means faster folding.

 

[fleshman03]

Not to mention overclocking my 3850 to 770 MHz core means faster folding.

YaY cure for cancer and/or finding ET. Both would be awesome.
/useless post.

 

[Eidorian]

YaY cure for cancer/ finding ET. Both would be awesome.
/useless post.

I use my computer to heat my room. Why not?

 

[fleshman03]

I use my computer to heat my room. Why not?

And going green! Nice.

Am I slow or am I the only one who thinks doing this on a mobile platform (with the different CPU and smaller casing) kind of a big deal. Wouldn't it get crazy hot?

 

[Eidorian]

And going green! Nice.

Am I slow or am I the only one who thinks doing this on a mobile platform (with the different CPU and smaller casing) kind of a big deal. Wouldn't it get crazy hot?

It's a very big deal given the form factor of the MacBook Pro and the chipset, GPU, and GPU being on the same heatpipe.

If it's a big computer or even the iMac it's a little less risky. I remember pushing my Mobility X1600 on the iMac to the stock 470/470 MHz and beyond over in Windows.

 

[mustang_dvs]

Sure, the MBP will run at 3.25GHz, but for how long? 5 mins? 10?

 

[lscangus]

Screenshot.

But i notice one thing during a stress test, the CPU jump to a 6X multiplier instead of 10.5X for 0.1 seconds, at a rhythm. This happens even when it is not overclocked. I wonder if it is the driver problem or it is my MBP defect.

Angus

 

[Eidorian]

Screenshot.

But i notice one thing during a stress test, the CPU jump to a 6X multiplier instead of 10.5X for 0.1 seconds, at a rhythm. This happens even when it is not overclocked. I wonder if it is the driver problem or it is my MBP defect.

Angus

Sounds like the CPU throttling itself to survive. That happens around 80-90 C on Intel processors and it depends on the model as well.

What are the load temperatures under stock speeds? How are the fans holding up?

 

[Essjay]

Sounds like the CPU throttling itself to survive. That happens around 80-90 C on Intel processors and it depends on the model as well.

What are the load temperatures under stock speeds? How are the fans holding up?

90 C is hot for a mobile chip but I read that they can withstand 100+ C, I have seen my old SR go as high as 85 C on a normal clock...

 

[Eidorian]

90 C is hot for a mobile chip but I read that they can withstand 100+ C, I have seen my old SR go as high as 85 C on a normal clock...

Mobile processors throttle back at higher temperatures and are more robust. Then again you do pay for it. Remember I did say the following...

That happens around 80-90 C on Intel processors and it depends on the model as well.

 

[Essjay]

Mobile processors throttle back at higher temperatures and are more robust. Then again you do pay for it. Remember I did say the following...

Ah, ok thanks for the clarification.

 

[lscangus]

Sounds like the CPU throttling itself to survive. That happens around 80-90 C on Intel processors and it depends on the model as well.

What are the load temperatures under stock speeds? How are the fans holding up?

it measures up 105'C which is the throttle speed of my CPU

But that happens when it is not overclocked....

so, that means my MBP is defect probably.... or it may have toooo much termal paste on it, like the first gen MBP

Angus

 

[Eidorian]

it measures up 105'C which is the throttle speed of my CPU

But that happens when it is not overclocked....

so, that means my MBP is defect probably.... or it may have toooo much termal paste on it, like the first gen MBP

Angus

In my testing Apple's SMC doesn't even throttle the fans until it's over ~90 C. The diode temperature readings are going to have a +/- slight deviation as well. I remember Intel releasing some documentation on Penryn's thermal diodes but the location escapes me right now.