i5-2500K turbo core 2.0 not working on P67A-UD4 ?

[va00]

I' ve recently assembled a new rig, everything seemed to work fine. However, I'm unable to get turbo core to work properly. No matter what settings are entered in BIOS all turbo multipliers are always the same. On Auto they are set to 34. Using ET6, any change prompts me to reboot system, and if I do, multipliers are changed, but again are equal (e.g. 1C=2C=3C=4C=36). I've never seen anything above 3.4 GHz in Intel Turbo Boost monitor. But even without overclock I shoud get 3.7 GHz at least.

[flakpyro]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Im experiencing a smilar problem with a 2600K, if i disable XMP turbo mode works but with XMP enabled it seems to never clock up, give that a shot and see if it helps or if i have a totally different problem all together.

[va00]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Indeed, with XMP disabled turbo core works as expected. Clocks up to 3.6 GHz using 1 thread, 3.5 GHz on two threads, etc. (using LinX).

[flakpyro]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Good to know im not the only one with this problem, it has stumped me for the past couple days. Hopefully this gets picked up and fixed in a later bios release.

Edit: Looks like more problems with XMP

http://www.gskill.us/forum/showthread.php?t=7536

[va00]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Unfortunately, disabling XMP reduces performance significantly. Is it possible to enter XPM settings by hand?
Turbo multipliers do not show on M.I.T status page in BIOS. But settings are effective in OS, if XMP is disabled.

[Chike]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Yes you can, if you know them, but you can try at least memory multiplier primary timings and memory voltage manually to begin with.
What about settings turbo options manually in BIOS?

[Darkling]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Unfortunately, disabling XMP reduces performance significantly. Is it possible to enter XPM settings by hand?
Turbo multipliers do not show on M.I.T status page in BIOS. But settings are effective in OS, if XMP is disabled.

Write down the timings example 7-7-7-20, write down the QPI voltage and Dram voltage that the XMP sets and you'll have the same settings as if you had XMP on.

[va00]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

I'm confused. Is QPI/Vtt Voltage the same thing as DDR VTT setting under XPM profiles? If yes, why with XMP enabled, QPI/Vtt is still 1.05 V, while on XMP BIOS page it reads VTT=1.3 V ?

[Chike]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

VTT, VCCIO in it's new name with sandy bridge is the voltage applighed to the memory coltroller of the CPU and QPI.
I don't know about the BIOS, where do you read 1.05, left to the auto settings? It is just showing the default value.
1.3 is a bit exssesive, from what I read you probably need 1.1 or a bit more.

[Darkling]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Use easy tune to see what the AUTO value sets in the bios and then go and type it manually with no XMP on, if XMP is causing issues

[va00]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

I tried to enter XMP settings by hand, but something went wrong. I've entered all XMP timings by hand, and voltages according to previously noted from both BIOS and ET6 voltages, i.e. DDR Voltage = 1.65V and QPI/Vtt = 1.05 V. System did not even post (screen1). Then with QPI/Vtt=1.1 V system started, with quick BSOD in Win7. After reboot, BIOS automatically reverted to F3, see screen2.

So what is going on? Should I try QPI/Vtt = 1.3 V? But why ET6 with XMP enabled still show QPI/Vtt=1.05V. Maybe this voltage is automatically variated under load?
See also these BIOS screenshots, with XMP
OFF
and
ON
.

[Chike]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Is the target QPI/Vtt also 1.05v?
Try increasing it graually, 0.01v at a time.

[Darkling]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

I tried to enter XMP settings by hand, but something went wrong. I've entered all XMP timings by hand, and voltages according to previously noted from both BIOS and ET6 voltages, i.e. DDR Voltage = 1.65V and QPI/Vtt = 1.05 V. System did not even post (screen1). Then with QPI/Vtt=1.1 V system started, with quick BSOD in Win7. After reboot, BIOS automatically reverted to F3, see screen2.

So what is going on? Should I try QPI/Vtt = 1.3 V? But why ET6 with XMP enabled still show QPI/Vtt=1.05V. Maybe this voltage is automatically variated under load?
See also these BIOS screenshots, with XMP
OFF
and
ON
.

Ok you need to set in the Bios Dram Voltage 1.65 ( 1.66 if it doesn't have ) and Qpi\Vtt 1.3. That is needed for the Ram to work as it should. The OFF picture you are sending are just JEDEC standard settings that default values of bios apply. And as far as ET6 maybe you are seeing some other values? I dont know this hardware is pretty new and with stuff like that the motherboard companies make their bios updates. Maybe this will be solved on a new bios release. Untill then you need to set the XMP settings manually which are 3 main things : QPI\VTT (idk how is called on P67), Dram Voltage and timings. Thats all XMP does.

[va00]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

Are you sure, QPI/Vtt = 1.3 V ?

[Chike]

Re: i5-2500K turbo core 2.0 not working on P67A-UD4 ?

How high VTT have you tried?