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i5 2500k BSOD 4.3ghz+ - Page 2

post #11 of 15
Quote:
Originally Posted by murdoc158 View Post
Tried 4.7GHz at 1.35v and Windows wouldn't boot. 1.40v got it to boot, but was locking up. 1.425 and she's rock solid. Idle at 30*C and just touches 70*C at full load.
Quote:
Originally Posted by Alepale View Post
I need 1.428 for 4.6 GHz on my 2500K too.
It's not a big deal, just higher than normal that I've seen especially with 2500ks and their lack of HT. If you've tested and that's the lowest you can go then that's about all you can do.
post #12 of 15
Thread Starter 
tried 1.392v @ 4.5ghz for 30mins in prime, I know its not long enough but it only got to 68c in that time.

Going to try it with 1.378v now.

Edit* BSOD within 3-5mins of prime at both 1.345v and 1.35v Running 4.4ghz at 1.344v now and it's stable, will post back with prime results later.
Edited by Azarathal - 6/25/11 at 9:26am
My first build.
(13 items)
 
  
CPUMotherboardGraphicsRAM
2500k i5 P67a-G45 HD4890 Corsair xms3 7-8-7-20 
Hard DriveOSMonitorPower
500gb WD SataIII Windows7 x64 42" LCD Zalman ZM500-HP 
Case
NXZT M59 
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My first build.
(13 items)
 
  
CPUMotherboardGraphicsRAM
2500k i5 P67a-G45 HD4890 Corsair xms3 7-8-7-20 
Hard DriveOSMonitorPower
500gb WD SataIII Windows7 x64 42" LCD Zalman ZM500-HP 
Case
NXZT M59 
  hide details  
Reply
post #13 of 15
I'm just beginning to OC my core i5. I have my i5 2500k running at 4.738GHz at 1.345V. However, I did increase the BCLK/FSB 3MHz (103MHz), and I still have to stress test it. Actually, I was going to make a new thread, but I might as well ask the question here. Is it better to have 100MHz or 103MHz multiplier @ 4.7GHz? I would like to know which is the best way to go since keeping at 100MHz multiplier seemed to cause stability issues.
Edited by SocketConundrum - 6/25/11 at 3:32pm
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k @ 4.7GHz/1.37V ASUS P8Z68-V EVGA GTX570 HD @ 825MHz Corsair Vengeance DDR3 1600MHz 
Hard DriveOSPowerCase
1TB Western Digital Windows 7 64bit Pro Corsair 620HX Antec 900 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k @ 4.7GHz/1.37V ASUS P8Z68-V EVGA GTX570 HD @ 825MHz Corsair Vengeance DDR3 1600MHz 
Hard DriveOSPowerCase
1TB Western Digital Windows 7 64bit Pro Corsair 620HX Antec 900 
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post #14 of 15
It's your memory settings. Try stock clocks, but stress test to see if your memory is stable 1st.
post #15 of 15
Alright, I have mine at 100MHz multiplier at 4.7GHz/1.37V stable. I used prime95 for well over 20 tests (roughly 30min. and played a few games. Overall, it's going strong. My bro has it set to 1.345V same multiplier and at 4.7GHz stable. So, there is definitely some variation between chips.

However, something interesting that I have noticed is that in ASUS AI suite monitor for my P8Z68-V mobo, the Vcore spikes to about 1.384-1.392V while running prime95, while my bros spikes to about 1.376-1.384V. Why is the Vcore in the ASUS monitor and CPU-Z going above the specified 1.37V within UEFI/BIOS? Hmm.

Found this:
http://www.overclock.net/intel-cpus/...z68-v-pro.html

It seems the fluctuation in voltage, even at a specified Vcore in UEFI/BIOS, is normal.
Edited by SocketConundrum - 6/26/11 at 6:05am
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k @ 4.7GHz/1.37V ASUS P8Z68-V EVGA GTX570 HD @ 825MHz Corsair Vengeance DDR3 1600MHz 
Hard DriveOSPowerCase
1TB Western Digital Windows 7 64bit Pro Corsair 620HX Antec 900 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Core i5 2500k @ 4.7GHz/1.37V ASUS P8Z68-V EVGA GTX570 HD @ 825MHz Corsair Vengeance DDR3 1600MHz 
Hard DriveOSPowerCase
1TB Western Digital Windows 7 64bit Pro Corsair 620HX Antec 900 
  hide details  
Reply
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