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Can non-K Sandy Bridge CPUs underclock on H61/H67/P67/Z68 mobos?

post #1 of 13
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all info in the title.
    
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post #2 of 13
Quote:
Originally Posted by Am* View Post
all info in the title.
I believe so, change the clock ratio (multipliers) down.
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post #3 of 13
Thread Starter 
Quote:
Originally Posted by trumpet-205 View Post
I believe so, change the clock ratio (multipliers) down.
Is it stable when doing this? Do you know the lowest possible & stable underclock (to match some low power state the CPU has without enabling it)? And do all motherboards support this?
    
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post #4 of 13
Quote:
Originally Posted by Am* View Post
Is it stable when doing this? Do you know the lowest possible & stable underclock (to match some low power state the CPU has without enabling it)? And do all motherboards support this?
In my case my i3 2100 throttles down from 31x to 16x during idle. I can check with BIOS later to see if I can manually change the multipliers.
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post #5 of 13
Thread Starter 
Quote:
Originally Posted by trumpet-205 View Post
In my case my i3 2100 throttles down from 31x to 16x during idle. I can check with BIOS later to see if I can manually change the multipliers.
Please can you check this and post a CPU-Z screen with the manual set underclock and any Prime95 calculation successfully completed alongside? I really appreciate your help, and will rep you if you can do this. Thanks again.
    
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post #6 of 13
I just started Prime95 and i3 2100 with 16x multipliers (1.6 GHz). So far so good, will post screenshot after letting it run for 20 to 30 minutes.
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Misaka
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post #7 of 13
Thread Starter 
Quote:
Originally Posted by trumpet-205 View Post
I just started Prime95 and i3 2100 with 16x multipliers (1.6 GHz). So far so good, will post screenshot after letting it run for 20 to 30 minutes.
That's great. Can't wait.
    
CPUMotherboardGraphicsRAM
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Fractal Design Define R3 
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CPUMotherboardGraphicsRAM
Intel Celeron G530 Haven't decided yet. GTX 460 768MB 4GB Ripjaws 
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post #8 of 13


After 20 minutes, still running. So far stable.
Misaka
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Misaka
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post #9 of 13
Thread Starter 
VERY NICE! Will rep as soon as it finishes, these are some damn good little energy efficient chips if that frequency works, I had total trouble underclocking the 140 Semprons we had at work (which are total power hogs compared to any Sandy Bridge CPU in idle state) while this looks like a walk in the park.
    
CPUMotherboardGraphicsRAM
Intel Celeron G530 Haven't decided yet. GTX 460 768MB 4GB Ripjaws 
Hard DriveOSMonitorPower
Samsung F3 1TB (SSD coming later) XP/Windows 7 Same old... Yet to decide. 
Case
Fractal Design Define R3 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Celeron G530 Haven't decided yet. GTX 460 768MB 4GB Ripjaws 
Hard DriveOSMonitorPower
Samsung F3 1TB (SSD coming later) XP/Windows 7 Same old... Yet to decide. 
Case
Fractal Design Define R3 
  hide details  
Reply
post #10 of 13


90 minutes passed. Still stable.
Misaka
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CPUMotherboardGraphicsRAM
Intel Core i5-3570K ASRock Z68 Extreme4 Gen3 Sapphire HD 7850 2 GB Samsung DDR3 16 GB (30 nm) 
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Windows 7 Professional x64 (Host) Crunchbang Linux x64 (Guest) HP 2311x HP PS/2 Keyboard 
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Hauppauge HVR-1250 
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Misaka
(18 items)
 
  
CPUMotherboardGraphicsRAM
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Crucial M4 128 GB WD Caviar Blue 1 TB Lite-on DVD Burner Thermalright Venomous X 
OSOSMonitorKeyboard
Windows 7 Professional x64 (Host) Crunchbang Linux x64 (Guest) HP 2311x HP PS/2 Keyboard 
PowerCaseMouseAudio
Rosewill Capstone 450 W Rosewill Challenger Logitech M570 ASUS Xonar D1 
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Hauppauge HVR-1250 
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