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i5 2500k 4.5oc stability issues

post #1 of 10
Thread Starter 
hi all

Trying to get a stable 4.5oc before i try for any higher. Before I get into any issues.. heres the hardware specs and current bios settings:

Rig:
Asrock Extreme7 gen 3 Z68
Gskill 1600mhz 10-10-10-28-2N (loosened from 9-9-9-24-2N) - 16GB
850w Corsair PSU

Bios:
Internal PLL overvoltage: Enabled
Turbo boost power limits: Short: 250
Long: 250
CPU Core current : 250

Speedstep: Enabled
Vcore : Offset (+.02) (sits around 1.328 under load)
LLC: Level 4
PLL: 1.83 (Auto)
VTT: 1.15 (Upped because of rounding errors and memtest halting.. this resolved that issue)
VCCSA: Auto

C1E Support: Enabled (read this doesnt affect oc)
c3: Disabled
c6: Disabled
Intel virtualization: disabled

Doing this from memory.. let me know if i forgot any important settings.

Well heres the deal. I was getting rounding errors in prime95 blend tests after about three hours in. After upping the VTT to around 1.15 those errors ceased to be a problem.

After resolving that problem i now can get to around 7-8 hours of prime95 blend before bsod 124.
I would really like to at least get this to withstand a 24hr blend test with no issues as I would like to use this for folding.

I have already messed with the vcore and pushed it to around 1.336 which i think is more than enough for a 4.5oc. And the VTT and PLL seem a little high as is.

Any advice would be really appreciated.

Thanks
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post #2 of 10
PLL or VCCIO voltage too high or low can cause BSOD 124 under load.

Your PLL is higher than what most find is best. Try lowering that.
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post #3 of 10
a good PLL is 1.7, that's what I'm currently using. I'm not 100% but I thought CPU Core current was supposed to be at 350. Don't quote me on that though.
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post #4 of 10
Quote:
Originally Posted by B-rock View Post
I'm not 100% but I thought CPU Core current was supposed to be at 350. Don't quote me on that though.
I was looking at that too, but I have no idea if it's different than our Asus boards.
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post #5 of 10
I know I have a setting at 350, I just don't remember the name of it. But I know for sure it is set at 350.
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post #6 of 10
Here's something that may help you out or something you might want to look at when OCing your sandy:

http://www.overclock.net/intel-cpus/...idge-read.html
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post #7 of 10
Thread Starter 
Quote:
Originally Posted by B-rock View Post
a good PLL is 1.7, that's what I'm currently using. I'm not 100% but I thought CPU Core current was supposed to be at 350. Don't quote me on that though.
yeah i know what you guys are referring to. I got that number from this guide http://www.overclock.net/14466483-post2250.html on this forum.
asrock
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CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
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asrock
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CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
Hard DriveOSPowerCase
Kingston SSD 120GB Windows 7 Professional Corsair 850w CM HAF 932 
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post #8 of 10
Quote:
Originally Posted by Ruination View Post
yeah i know what you guys are referring to. I got that number from this guide http://www.overclock.net/14466483-post2250.html on this forum.
Yep there you go. Your board is different. Stick with the 250 there and try lowering your PLL voltage to 1.7.
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post #9 of 10
Thread Starter 
Quote:
Originally Posted by mark_thaddeus View Post
Here's something that may help you out or something you might want to look at when OCing your sandy:

http://www.overclock.net/intel-cpus/...idge-read.html
i do like the idea of a safe mode test to perhaps narrow down the problem at least.

thanks ill give that a go

and i'll try the pll down to 1.7 beforehand

if i see another bsod when i wake up.. work is gonna be tough tomorrow haha
asrock
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
Hard DriveOSPowerCase
Kingston SSD 120GB Windows 7 Professional Corsair 850w CM HAF 932 
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Reply
asrock
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
Hard DriveOSPowerCase
Kingston SSD 120GB Windows 7 Professional Corsair 850w CM HAF 932 
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Reply
post #10 of 10
Thread Starter 
Yep... ****ty day indeed
asrock
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
Hard DriveOSPowerCase
Kingston SSD 120GB Windows 7 Professional Corsair 850w CM HAF 932 
  hide details  
Reply
asrock
(13 items)
 
  
CPUMotherboardGraphicsRAM
i5 2500k Asrock Extreme7 Gen3 EVGA GTS 450 SLI GSKILL Ripjaw X 16GB 1600mhz 
Hard DriveOSPowerCase
Kingston SSD 120GB Windows 7 Professional Corsair 850w CM HAF 932 
  hide details  
Reply
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