Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
MBA2012 CTO model is turbo boost disable under windows 7
- Thread starter tori10love
- Start date
- Sort by reaction score
Bump...
Does anybody know of some chipset drivers that enable the turboboost or any other workaround?
Does anybody know of some chipset drivers that enable the turboboost or any other workaround?
Not yet. Intel hasn't posted the Ivy Bridge chipset drivers to its website yet.
the rMBP does NOT have this issue
Turbo Boost works just fine on the rMBP.
Under BootCamp, Geekbench scored 14784 in 64-bit mode and I verified Turbo Boost was kicking in using Intel's Turbo utility.
I hope they get the issue fixed with the Air because that machine was noticeably faster in OS X than previous model yet noticeably slower in bootcamp.
Turbo Boost works just fine on the rMBP.
Under BootCamp, Geekbench scored 14784 in 64-bit mode and I verified Turbo Boost was kicking in using Intel's Turbo utility.
I hope they get the issue fixed with the Air because that machine was noticeably faster in OS X than previous model yet noticeably slower in bootcamp.
I may test them out today if I get a chance. I would suppose well see some sort of fix that lines up with the release of ML.
So the intel management engine appears to be the most up to date with a July 5th date, this will be the one I will try...
What site are you going on to get the drivers? I didn't see it at the Intel site. Are you using the station-drivers page?
I should be able to try it this evening.
I was referring to this post...
Quote:
Originally Posted by KPOM
Not yet. Intel hasn't posted the Ivy Bridge chipset drivers to its website yet.
Anyone tested these yet?
http://www.station-drivers.com/page/intel chipset.htm
----------
Also, in case you haven't seen, this may also be a related issue as well, wonder what it shows for the 8GB RAM i5 2012 MBA air folks...
https://forums.macrumors.com/showthread.php?p=15213125#post15213125
I've ordered the i7. I do hope they fix this entire Boot Camp issue, but I'll try out some of the driver stuff once I get mine.
My bet is we'll see a bootcamp update in conjunction with the release of Mountain Lion (I think there's some EFI changes from Lion -> ML?, if true then there would likely be a bunch of bootcamp updates as well).
Has anyone tried Consumer Preview of Windows 8? I noticed there's some drivers from Intel that are more current for Windows 8 support (I think). I may try this tonight.
That sounds even worse than the non-turbo boost issue, only 64Mb memory allocated for graphics, WTF! :-( One of the reasons I upgraded to the 8 Gb model was to be able to get 512Mb allocated to graphics instead of the 384Mb in thd 4Gb version...
Last edited:
I think it may just be the dynamic memory throwing it off.
This is what Control Panel reports. I also ran GPU-Z and played an HD video. While I confirmed that the maximum GPU speed was 800MHz (meaning Turbo Boost wasn't on), it did use 100MB of memory. It was a CNet video, so I wasn't expecting it to use much. I don't have any Windows games so I couldn't check something that would use much more.
workaround
use ThrottleStop 4.0
http://www.techpowerup.com/158795/Te...eStop-4.0.html
TRL(Turbo Ratio Limits) set to Maximun Turbo Ratio Limits. 1 core active 32/ 2core active 30.
i have confirmed improvement that proccesor sore on windows7 experience index is up to 7.1.
use ThrottleStop 4.0
http://www.techpowerup.com/158795/Te...eStop-4.0.html
TRL(Turbo Ratio Limits) set to Maximun Turbo Ratio Limits. 1 core active 32/ 2core active 30.
i have confirmed improvement that proccesor sore on windows7 experience index is up to 7.1.
A couple questions:
1. Does this force it in to constant turbo mode then?
2. Remember the other issue is the base frequency being 1.9 due to incorrect multipliers, what is now that base frequency and can that be changed using this method?
1. Does this force it in to constant turbo mode then?
2. Remember the other issue is the base frequency being 1.9 due to incorrect multipliers, what is now that base frequency and can that be changed using this method?
Quick update:
New Bootcamp
Windows 8 x65
Check CPU-Z (1.8GHz btw)
Install Bootcamp Drivers
Check Again (still 1.8)
Install Intel Windows 8 Drivers
Check Again (2.1 GHz wtf?)
Still running some other tests such as geek bench and such.
New Bootcamp
Windows 8 x65
Check CPU-Z (1.8GHz btw)
Install Bootcamp Drivers
Check Again (still 1.8)
Install Intel Windows 8 Drivers
Check Again (2.1 GHz wtf?)
Still running some other tests such as geek bench and such.
ThrottleStop 5.00
http://www.techinferno.com/downloads/
The latest version supports the new Ivy Bridge CPUs when running Windows.
ThrottleStop can not interfere with the thermal management built into these CPUs by Intel. No software can bypass Intel hardware from throttling if it truly needs to.
http://www.techinferno.com/downloads/
The latest version supports the new Ivy Bridge CPUs when running Windows.
ThrottleStop can not interfere with the thermal management built into these CPUs by Intel. No software can bypass Intel hardware from throttling if it truly needs to.
I wonder how the windows 8 comparability is, anybody tried this utility there yet?
I guess this bug is a problem of setting the MSR (IA32_PERF_CTL:Target performance State Value) in EFI.
It is assumed in the model CTO in the initialisation of the MSR in EFI, is to set the Target P-State and 19 at the time of turbo boost, and the root cause of the bug (I originally set 32 is correct).
As a temporary workaround, in the application of the Throttle Stop, but it was confirmed that Turobo Boost working effectively, then, I tried to examine the state of the MSR at the before and after application of the Throttle Stop.
As a result, the following was found.
• The CTO model EIST, Turbo Boost is enabled.
• However, in the CTO model, Target P-State is closed when the Turbo Boost is set to 19-fold. Therefore, Current P-State can not be set to at least 19-fold magnification of the CPU.
• When you execute the Throttel Stop, so that can be set to 32 the Target P-State of Turbo Boost, will be able to raise up to max 32 also Current P-State magnification of the CPU.
In fact, before and after execution of the Throttle Stop, appears similar to the following and see the state of the MSR. (The value of the MSR, Save Report(.TXT) of the "About" → "Tools" of CPU-Z in the, you can see)
CPU Throttle Stop before) cpu multiplier 19 (max cpu multiplier 19)
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x00000198 0x00001CD2 0x00001300
MSR 0x00000199 0x00000000 0x00001300
⇒ enable EIST, enable TurboBoost, the current P-State 19, the target P-State 19
CPU Throttle Stop after) cpu multiplier 30 (max cpu multiplier 32)
MSR 0x000001A0 0x00000000 0x00850089
MSR 0x00000198 0x000021A0 0x00001E00
MSR 0x00000199 0x00000000 0x00002000
⇒ enable EIST, enable TurboBoost, the current P-State 30 , the target P-State 32
From the above, CTO model, at the time of initialization when the switch to Windows, it would have been set to 19(0x00001300) is Target performance State Value is IA32_PERF_CTL of MSR in the BootCamp is a cause of trouble, 32(0x00002000) you can determine it because it does not, and has been a state that does not increase the magnification was also an attempt to invoke the turbo boost when under load.
MBA2012 Core i5 in the standard model, so go up 26 of cpu multiplier, probably should be the value of the following.
MSR 0x00000199 0x00000000 0x00001A00
<Reference>
· Intel64 and IA-32 Architectures Software Developer's Manual Combined Volumes1, 2A, 2B, 2C, 3A, 3B and 3C
http://download.intel.com/products/processor/manual/325462.pdf
· CHAPTER 14 POWER AND THERMAL MANAGEMENT
14.1 ENHANCED INTEL SPEEDSTEPR TECHNOLOGY
14.3.2.2 OS Control of Opportunistic Processor Performance Operation
· CHAPTER 34 MODEL-SPEC IFIC REGISTERS (MSRS)
34.7 MSRS IN INTELR PROCESSOR FAMILY (INTELR MICROARCHITECTURE CODE NAME SANDY BRIDGE)
1A0H IA32_MISC_ENABLE
16 Enhanced Intel SpeedStep Technology Enable. (R/W)
38 Turbo Mode Disable. (R/W)
198H IA32_PERF_STATUS
15:0 Current performance State Value.
199H IA32_PERF_CTL
15:0 Target performance State Value.
32 IDA Engage. (R/W).
Last edited: