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13" Mbp Only 1.5gb Sata ? - SOLVED!!!!!!!!!
- Thread starter MacModMachine
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There are a ton of unhappy people out there due to this 1.5 thing from Apple. I sure hope that Apple resolves this issue quickly
There are a ton of unhappy people out there due to this 1.5 thing from Apple. I sure hope that Apple resolves this issue quickly
Unhappy why? Because people are seeing slowdowns in day-to-day activities? I've yet to see anyone with a valid reason why the 'downgrade' was a horrible mistake, other than perception.
I'm not apologizing for Apple; I see the appeal of 3Gbit speeds-- I have an SSD arriving shortly. I just want to know if anyone can quantify and say that their day-to-day activities with this throttle-down has been detrimental.
Really.
if tomorrow Apple release a firmware update to fix the SATA slowdown, will you update?
If no one care about this regression, will apple release a fix for it?
We should thanks for the guys who post on this thread. Without you Apple might not know about this problem.
They will learn do more test before release next time.
SSDs must be popular
It is a little crazy given that the Intel x25m drive I just bought cost around $600usd and the laptop is around $1100. Do I really need the machine to feel snappier than it already is? BTW, it runs very fast and the wife is extremely happy with it, but for whatever reason, I feel compelled to know that it can run faster and be better down the road. Not a very logical or economical decision.
oh, well...
Guys I have an old early 2008 "classic" 15 inch 2.5 Ghz MBP. And under system profiler I'm also seeing 1.5 Gigabit. Is this normal? I thought mine was supposed to be 3.0.
I think the reason why many people care about this is they think they will probably upgrade to ssd some time in the future. Will you upgrade your hdd to ssd if you know this problem hasn't fixed? Will you order your laptop with ssd if the one that come with ssd also face the same problem?
There are a ton of unhappy people out there due to this 1.5 thing from Apple. I sure hope that Apple resolves this issue quickly
Actually, I think it's more like 1103 people (post count) who have bothered to raise any sort of stink. Add in the double and triple the sky is falling posts and it's probably much less compared to the tens of thousands of updated laptops flying off the shelves right now.
So you're claiming that the overhead of the SATA logic is an order of magnitude more than 0.2 Watts ? How much ? 2 Watts ? 20 Watts ?
Let's do a little math with those TDP figures ...
The total draw for the old ICH8 chip with the following logic: DMI, PCIe, PCI, SATA, USB and HD Audio = 3 Watts
But this is with 4 SATA devices attached. So let's remove that and we have a 3.0 - (0.2 x 4 ) = 2.2 Watts
Notice there are 5 devices also attached to the PCI (3) and PCIe (2) buses. And 8 and 2 devices attached to the USB bus. But I'll tell you what ... let's just subtract 0.1 Watts per PCI/PCIe device for argument's sake and ignore the USB ... so that's 2.2 Watts - 0.5 Watts = 1.7 Watts ( You can see that the power draw of the chip jumps from 3.7W to 4.1W when you attach a x4 load, let's assume every x1 load causes a 0.1W jump in power )
So the OVERHEAD of the logic itself is around 1.7 Watts ... and that logic includes the DMI 4x switch, the PCIe logic, PCI, SATA, USB and HD Audio
Let's further say that USB and HDAudio don't contribute anything here. We're still left with DMI, PCIe, PCI and SATA. Now the DMI 4x logic is the most complex and runs at the highest speed of the four. And PCIe is more complex and runs at higher speed than PCI, which itself runs faster than SATA. So it would make sense that DMI logic would take significant percentage of the power.
But never mind, let's assume they all take equal amounts even though the SATA logic should take the smallest percentage of this. So that's 1.7 Watts / 4 = 0.425 Watts. At load.
And this is for a chip that's a generation behind in process technology than the GF9400m. You surely don't think the 9400m's 65nm tech SATA logic has the same power draw as the ICH8's 90nm tech SATA logic do you ?
Yes I haven't considered SATA 1.5 Gbit/s, so let's consider. How much savings do we get when we downclock the SATA logic ? Half ? A third of the normal power required for 3.0 Gbit/s operation ? Even saving at a third ..that's 0.14 watts. So we save ... 0.285 Watts. So for paltry 0.3 Watts we would rather downclock the SATA ?
Unless of course you're telling me that the SATA logic itself is so complex that it takes 2 Watts out of the 2.2 Watts. And that PCI, PCI express, and the DMI logic is of no consequence even though it is far more complex and operates at much higher speeds. Do you realise how ludicrous you would sound ?
So now you're claiming that SAVINGS are > 1W ? Where did you get this figure from ? Is that savings under load ? You have specs for the 9400m ? You did some back of the envelope calculations with comparable technology ? Or processes ? Or like someone else said it's another "argumentum ad ignorantiam " ?
And again you conflate your argument with something else. Does the 1W saving, by your admission, represent a significant percentage of the longer battery life performance ? Yes or no ?
As others have pointed out ... you make absurd statements, improper analogies, contradict yourself, paint yourself into a corner and then ...
2x
my February unibody 2.8ghz 15" has 3.0Gbit
Not me. To each their own! I have Intel SSD X25 on my Late 08 Unibody. I almost traded it for the new one last weekend. Luckily I got here first. I'd rather keep mine if this SATA issue cant be fixed.
Intel ICH8-M AHCI:
Fabrikant: Intel
Product: ICH8-M AHCI
Snelheid: 1,5 gigabit
Beschrijving: AHCI Version 1.10 Supported
Since when is Apple putting in the 3,0 gigabit version in their machines? This is from my 2007 Macbook Pro 15" Santa Rosa 2.4Ghz.
Fabrikant: Intel
Product: ICH8-M AHCI
Snelheid: 1,5 gigabit
Beschrijving: AHCI Version 1.10 Supported
Since when is Apple putting in the 3,0 gigabit version in their machines? This is from my 2007 Macbook Pro 15" Santa Rosa 2.4Ghz.
The figures quoted are for the desktop variant. ICH8-M is the mobile variant. There are some SATA compatibility problems with the ICH8 and SATA to PATA bridge chips. Hence they were set to SATA 1.5 Gbit/s on many laptops - Lenovo and Dell included, and not just Apple.
On laptops that have zero IDE optical drives or connections - the ICH8 can be set to 3.0 Gbit/s without problems
This means you are under SATA II 3Gbps. And therefore, the limit is only in the Mac OS/firmware. No hardware limitations. Hooray.
Correct me if I'm wrong. And sorry in advance.
This means you are under SATA II 3Gbps. And therefore, the limit is only in the Mac OS/firmware. No hardware limitations. Hooray.
Correct me if I'm wrong. And sorry in advance.
Nice find ! If this is true then a simple firmware update should do the trick
Nice find ! If this is true then a simple firmware update should do the trick
But although windows report sata 3g interface
the performance on large file transfer is still hindered to speed of
sata 1.5g.
So i guess that only shows that windows detect the motherboard have
sata 3g potential.....
and i do hope firmware upgrade can fix it also
unless making sata 3g will make other interface to cease work (ie firewire)
This means you are under SATA II 3Gbps. And therefore, the limit is only in the Mac OS/firmware. No hardware limitations. Hooray.
Correct me if I'm wrong. And sorry in advance.
Linux also reports the controller as SATA-II but the actual HD is running at SATA-I speeds. If anyone would like to confirm this, boot Ubuntu 9.04 and run the following command:
Code:
sudo hdparm -I /dev/sda | grep SATAThis is with a Scorpio Black in the machine so it is definitely a SATA-II HD.
the 2.4 is the same dealio im rocking...i love it. 25watt chip , 15" screen , dual intel ssd's
mmmm......
I just spoke with Apple technical support and they said that the controller is 1.5GBits, and it shouldn't bother us because all the HDDs they offer in the Apple Store don't reach that limit, I also asked about the SSDs and they said that their SSDs don't pass that limit.
I'm going to get it with an HDD so it doesn't really bother me.
I don't know if what they said is wright, but it is Apple's opinion on this.
I'm going to get it with an HDD so it doesn't really bother me.
I don't know if what they said is wright, but it is Apple's opinion on this.
there correct...the ssd's dont pass the limit....but 80% of the good ssd's do.
So judging by the above posts, what's the likelihood that this is a compatability issue with the SD card or some other thing and that Apple will simply say nothing that they sell exceeds SATA I speeds?