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Idle and low load stability on my 2600K

post #1 of 19
Thread Starter 
Im having issues with getting my 2600K to be stable in idle/low load situations while having all the power saving features enabled, disabling C3/C6 mostly resolves this issue but I would like the voltages to go as low as possible when the computer is idle as I believe it can help/extend with the life of my processor, I intend to keep this for 2-3yrs before moving to the next platform.

I currently have everything in AUTO aside from my VTT which is at 1.100 and Vcore is at Normal with +0.040 offset.

I test light load with a single thread of Pi 32M and it will BSOD if C3/C6 is enabled. Also Im wondering if there is a way to maintain 1.380v loaded voltage on light to heavy load, running 1 32M test shoves 1.392v and not have 32M Pi BSOD in 1 thread.
Edited by EarlZ - 5/24/11 at 10:41pm
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post #2 of 19
i think you could achieve your target load voltage by using manual voltage with light llc enabled. I too was unstable using offset so i switched to manual and played around with the llc and vcore until i was happy with the voltage under load. Speedstep would lower the voltage at idle but not so much that it would freeze or bsod under light load
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post #3 of 19
Thread Starter 
With manual voltages on the UD4-B3 all the power saving features wont lower the voltages only the clocks drop to 1600Mhz.

Upping the offset from 0.040 to 0.050 makes it more stable but resulting load voltage is 1.392v =(
There has to be another way to get this to work properly with c3/c6 enabled. I've tired VTT at 1.200v PLL at 1.880v and VccSA at 0.935v
Edited by EarlZ - 5/25/11 at 12:08am
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post #4 of 19
Quote:
Originally Posted by EarlZ View Post
Im having issues with getting my 2600K to be stable in idle/low load situations while having all the power saving features enabled, disabling C3/C6 mostly resolves this issue but I would like the voltages to go as low as possible when the computer is idle as I believe it can help/extend with the life of my processor, I intend to keep this for 2-3yrs before moving to the next platform.

I currently have everything in AUTO aside from my VTT which is at 1.100 and Vcore is at Normal with +0.040 offset.

I test light load with a single thread of Pi 32M and it will BSOD if C3/C6 is enabled. Also Im wondering if there is a way to maintain 1.380v loaded voltage on light to heavy load, running 1 32M test shoves 1.392v and not have 32M Pi BSOD in 1 thread.
This is next to impossible with C3/C6 on many systems. It's just how it goes. I dont remember the reasons why but it's something to do with the vcore not ramping up fast enough when the clock speed kicks in...now if you were using full vcore ....

Someone in another thread asked me to "prove" that using high overclocks and offsets with C3/C6 lead to BSOD's on 1 thread...well there's more proof.

@Edit:
Tried raising PLL voltage a little? It helped with my idle/light load 0x124's at 5 ghz on mine, but I'm using fixed vcore so perhaps that won't do anything for you.
Edited by Falkentyne - 5/25/11 at 1:45am
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post #5 of 19
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I tried to up the PLL upto 1.88 on my board, same issue.. either C3/C6 has to go OR i add another 0.010 offset.
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post #6 of 19
That's all you can do, then. Overshooting your target voltage is sometimes the price you pay for utilizing the c states. I don't use them, though....just more work to be done, though it definitely has its uses at high vcores, for preserving your cpu.
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post #7 of 19
Quote:
Originally Posted by EarlZ View Post
I tried to up the PLL upto 1.88 on my board, same issue.. either C3/C6 has to go OR i add another 0.010 offset.
Have you tried lowering the pll to 1.72v ?? this helped me lower my vcore under load
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post #8 of 19
We were discussing PLL stuff earlier.

I actually need to raise the PLL to get rid of some 0x124 errors at certain clocks/voltages. Decreasing PLL doesn't help one bit on my CPU. I guess this is proof that EVERY cpu out there is different and will respond differently. My first 2600k doesn't respond at ALL to PLL voltage in either direction, up or down. It's noteworthy, because that cpu *always* BSOD 191's in prime blend. The other chip responds favorably to 1.86v PLL It's strange, because that CPU will BSOD 0x124 in prime blend at to low vcores, and either raising the vcore, OR raising the PLL, will delay the BSOD's from happening for awhile, but NOT BSOD 101. It only bsod 101's at 5 ghz if I prime with too little vcore, but 124's at 4.5...weird huh?

. But vcore has more of an effect than the PLL. However, at 5 ghz with LLC2, I was getting BSOD's on idle and light load, and since I was at 1.410v BIOS (1.428v idle), here raising the PLL helped greatly in stopping the idle bsod's. Lowering it didn't do anything at all. Of course raising vcore ALSO helped, but if raising PLL and keeping vcore lower helps preserve the cpu, I'd rather do that instead.

(In this case, for 4.5 ghz, better to raise vcore from 1.236v load to 1.260v load instead of raising PLL, but at 5 ghz, better to raise PLL than to raise vcore from 1.428v idle to 1.440v!)
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post #9 of 19
Quote:
Originally Posted by Falkentyne View Post
This is next to impossible with C3/C6 on many systems. It's just how it goes. I dont remember the reasons why but it's something to do with the vcore not ramping up fast enough when the clock speed kicks in...now if you were using full vcore ....

Someone in another thread asked me to "prove" that using high overclocks and offsets with C3/C6 lead to BSOD's on 1 thread...well there's more proof.

@Edit:
Tried raising PLL voltage a little? It helped with my idle/light load 0x124's at 5 ghz on mine, but I'm using fixed vcore so perhaps that won't do anything for you.

Thats not true. I have c3/c6 enabled on my asus board with absolutely no problems. I am using offset for vcore. Maybe true for gigabyte boards, but not asus p67.

edit: on another note, maybe gigabyte will release future bios update that adresses this?
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post #10 of 19
I still have yet to see anywhere that someone credible(not falkentyne) has claimed C3/C6 states cause this. So far all Falkentyne keeps saying is "he said" crap that has no credibility.
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