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i7 2600K only overclocking to 4.7

post #1 of 16
Thread Starter 
Im running a 2600k on a Gigabyte P67A-UD7 that hasnt been fixed for the chipset problem. I spent days tweaking all kinds of settings.
Watercooling loop
BIOS version f7
Stable boot into BIOS- 4.7GHz @1.22Vcore, low LLC, 26C on all cores
Stable boot into Windows7- 4.1GHz @1.25Vcore, Low LLC
Intel Burn Test-8Core test, Very High settings, 5 loops-Idle 28C, Load- 49C
With the cpu at stock speeds my room is around 20C, the cpu runs round 18C Idle at stock speeds

All settings in BIOS that save power, change cpu speed are disabled, including turbo boost. I can boot into windows with a multiplier of 47, but it is only running at 4.1 according to multiple programs. Im wondering why I cant boot into windows at a higher clock speed, and why my processor won't boot past 4.7GHz. Iv booted at that using 1.22vcore to 1.38vcore, and when I bump up to from X47 to X48 in BIOS, my system crashes during the boot. the temps stay extremely low even with high voltages.

Would a new BIOS update fix this or is that just the max overclock for my CPU. I dont have the batch number written but it was bought at the day of release.
Edited by stilts88 - 3/19/11 at 6:26pm
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post #2 of 16
Quote:
Originally Posted by stilts88 View Post
Im running a 2600k on a Gigabyte P67A-UD7 that hasnt been fixed for the chipset problem. I spent days tweaking all kinds of settings.
Watercooling loop
BIOS version f7
Stable boot into BIOS- 4.7GHz @1.22Vcore, low LLC, 26C on all cores
Stable boot into Windows7- 4.1GHz @1.25Vcore, Low LLC
Intel Burn Test-8Core test, Very High settings, 5 loops-Idle 28C, Load- 49C
With the cpu at stock speeds my room is around 20C, the cpu runs round 18C Idle at stock speeds

All settings in BIOS that save power, change cpu speed are disabled, including turbo boost. I can boot into windows with a multiplier of 47, but it is only running at 4.1 according to multiple programs. Im wondering why I cant boot into windows at a higher clock speed, and why my processor won't boot past 4.7GHz. Iv booted at that using 1.22vcore to 1.38vcore, and when I bump up to from X47 to X48 in BIOS, my system crashes during the boot. the temps stay extremely low even with high voltages.

Would a new BIOS update fix this or is that just the max overclock for my CPU. I dont have the batch number written but it was bought at the day of release.
Don't use F7. That bios doesn't have PLL Override if I recall correctly.
Try either the latest f7 beta, or try f8f beta or something.

Use PLL override to boot at higher multipliers.

Something's wrong with your setup. Make sure you go to cpu options and set "Core control by OS" to disabled, that will gray out the "per core" options, and use a fixed multiplier. Then disable C1, C3, C6, and the other power saving options, and you shouldn't be showing up as x41.

Set LLC1 enabled.

There's definitely something wrong when you say you can boot up at x47 STABLE with 1.2, but you need 1.25v for x41? Clearly something's wrong with that -.-
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post #3 of 16
Just don't blow it up... Not all 2600k chips can push to 5 Ghz and beyond.

As for your problem, going beyond 4.7 is causing the system to be unstable and if you have tried everything and still it doesnt work, then i would even drop down the clock a little bit because you are at the max the chip can handle.

You are getting pretty good results, its very cool on load and idle. The voltage seems ?? questionable. I really dont think BIOS update will fix it, BUT if there is a bios update availiable always go for it!
Edited by mikeseth - 3/19/11 at 6:52pm
post #4 of 16
Thread Starter 
I havent used any damaging voltages on my cpu. I started tweaking stuff around a week after the 2600k released, and I feel like its a bios problem. From what other people get I can get a high overclock on fairly low voltages. And its very stable, 4.7ghz was only for testing, but iv been running 4.1ghz since I bought the computer and havent had a crash/black screen.
Unless somehow the chip is limited it seems like haven't hit the highest multiplier it can handle. Im just trying to find out what the problem is.
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post #5 of 16
Thread Starter 
I had it set at 1.25Vcore for both times, but it read as 1.22 in bios for that multiplier. My only guess was LLC was messing with it a bit.
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post #6 of 16
Thread Starter 
Last night i got a waterblock for my GTX 570 for the same loop and decided to update everything, including getting F7 BIOS.
Before windows would only allow my processor to clock at 4.1GHz, now i get the full 4.7@ 1.3vCore. I maxed 59C after 2 intel burn tests on High, as well as Kombuster at the same time just to see if I could get 100% load on both to max out the water temp. That is becide the point of this thread...

I am still unable to overclock past a 47 multiplier, even with the PPL Overvolt setting, as well as removing/downclocking ram sticks. I even put in 1.6vCore with Level 2 LLC and it still cant boot at higher clocks. Does this mean iv reached the chip's max OC?
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post #7 of 16
1.3V sounds pretty low for 4.7Ghz. I don't know if you are worried about stability yet, but I get way more crashes on my 2600k using Prime95 than IBT. However, this is only true if you are not using the AVX instruction set. Windows 7 SP1 includes new instructions that the SB processors can use, and if you download the proper files for IBT, it makes the test MUCH more strenuous. This is how people with 2500k's are getting insane gflop (like 150 or something).

As for the multiplier, I haven't heard many people getting stuck as low as 47x. You may have hit your max multiplier, but I wouldn't give up just yet. Make sure you have the very latest bios, clear your cmos, use 1 ram stick, and play with settings one at a time. I'm pretty sure I actually leave all of the power saving features on, but I have an ASUS board so perhaps this isn't a comparison I can make.
    
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post #8 of 16
Only 4.7 you say huh? That should be sufficient enough for almost anything.
post #9 of 16
Thread Starter 
Yea I know 1.3v is pretty low. Its been running at that with my GTX 570 in the loop now at 900mhz core/ 2100mhz ram @ 1.1v. Iv had my computer on for 3 days straight now, iv run over 20 intel burn tests including 5 loops at maximum (14GB ram is used) and im getting about 54gflop. Iv also been playing WoW and Crysis 2/ Warhead and not a single error or blue screen. I have the lastest F7 BIOS and I tryed all the stuff you mentioned with the same result. The whole point of this threat is because according to my voltages and temps this is a very good chip if it wasnt limited to 4.7ghz.

Im confused as to why my bios doesnt have the PPL Overvolt setting in bios even though F7 is supposed to support it.

I changed the bus to 1002hz in bios because my board runs about .2 lower than whats set to. But that was after all my testing. 4.703ghz looks way more impressive than 4.696ghz in cpuz lol.
Edited by stilts88 - 4/1/11 at 12:17pm
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post #10 of 16
The default IBT doesn't stress Sandybride very well because it has outdated LinPacks. Either run Prime95 or get LinX/IBT with the updated LinPacks and rerun.

I've included LinX with the Updated LinPacks below.
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