I managed to pick up a nice "SpotCooler" for my rig. Absolutely love it. It screws to one of your mobo mounts. It was exactly what I was looking for. I have it blowing across my memory and NB heatsink.
Ok heres where my hellish weekend begins!
I install my new fancy spot fan. My CPU under full load dropped about 4C. So now its time to see how high I can clock my E8400 on air with reasonable Voltages.
All voltages are from CPUZ under full load running IBT.
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4.1Ghz vcore 1.34 / 2.4B strap / FSB 456 memory@ 1094Mhz tRD9 Dram 2.1v / IBT"High" 10 pass : success / Small FFT's 2hrs good / Large FFT's FAIL within 2min
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4.2Ghz vcore 1.34 / 2.0D strap / FSB 467 memory@ 934Mhz tRD10 Dram 2.1v / IBT"High" 10 pass : success / Small FFT's 2hrs good / Large FFT's FAIL within 2min
-----------------------
4.4Ghz vcore 1.37 / 2.0D strap / FSB 489 memory@ 978Mhz tRD10 Dram 2.1v / IBT"High" 10 pass : unstable " No further testing at this speed " I go back to focusing more on 4.2Ghz
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So I set everything back to 4.2Ghz. I try pushing my vcore to 1.36v. IBT and Small FFT's are fine once again. But as soon as Im doing Blends and it kicks off a Large FFT, hardware failure. So im thinking my memory is bombing out on me. Since Large FFT's actually stresses your Memory.
So I go into my bios, up my DRAM to 2.12v and up my MCH from 1.26v to 1.28v and boot back into windows.
Go to launch Prime95 Large FFTs' and BSOD. WTF!! confused.
I give up and set everything back to 4.05Ghz. Like I had prior. IBT tests fine, Small FFT's fine, but when I start a Large FFT's it fails almost immediatly. So now Im REALLY confused/frustrated.
I go online and read something about G.Skill memory actually not working well with high voltage. So hey, why not try something different.
I go into my BIOS, drop MCH to 1.24v and my Dram to 2.06v. Boot into prime95. Baddabing! Had Large FFT's running for well over an hour this morning before work without ANY issues. IBT HIGH did 10 passes without any issues. This is a 1.328 vcore.
So.. I have yet to tweak/tinker more. But Im wondering if I can keep my DRAM/MCH voltages low, and hopefully THAT will resolve my stability issues at 4.2Ghz+
My temps at 4.2Ghz in IBT were only topping at 70C which is fantastic since Prime95 never even breaks 60C now. This was with my vcore @ 1.34
Thoughts, Advice, Comments?
Thanks.
Ok heres where my hellish weekend begins!
I install my new fancy spot fan. My CPU under full load dropped about 4C. So now its time to see how high I can clock my E8400 on air with reasonable Voltages.
All voltages are from CPUZ under full load running IBT.
-----------------------
4.1Ghz vcore 1.34 / 2.4B strap / FSB 456 memory@ 1094Mhz tRD9 Dram 2.1v / IBT"High" 10 pass : success / Small FFT's 2hrs good / Large FFT's FAIL within 2min
-----------------------
4.2Ghz vcore 1.34 / 2.0D strap / FSB 467 memory@ 934Mhz tRD10 Dram 2.1v / IBT"High" 10 pass : success / Small FFT's 2hrs good / Large FFT's FAIL within 2min
-----------------------
4.4Ghz vcore 1.37 / 2.0D strap / FSB 489 memory@ 978Mhz tRD10 Dram 2.1v / IBT"High" 10 pass : unstable " No further testing at this speed " I go back to focusing more on 4.2Ghz
-----------------------
So I set everything back to 4.2Ghz. I try pushing my vcore to 1.36v. IBT and Small FFT's are fine once again. But as soon as Im doing Blends and it kicks off a Large FFT, hardware failure. So im thinking my memory is bombing out on me. Since Large FFT's actually stresses your Memory.
So I go into my bios, up my DRAM to 2.12v and up my MCH from 1.26v to 1.28v and boot back into windows.
Go to launch Prime95 Large FFTs' and BSOD. WTF!! confused.
I give up and set everything back to 4.05Ghz. Like I had prior. IBT tests fine, Small FFT's fine, but when I start a Large FFT's it fails almost immediatly. So now Im REALLY confused/frustrated.
I go online and read something about G.Skill memory actually not working well with high voltage. So hey, why not try something different.
I go into my BIOS, drop MCH to 1.24v and my Dram to 2.06v. Boot into prime95. Baddabing! Had Large FFT's running for well over an hour this morning before work without ANY issues. IBT HIGH did 10 passes without any issues. This is a 1.328 vcore.
So.. I have yet to tweak/tinker more. But Im wondering if I can keep my DRAM/MCH voltages low, and hopefully THAT will resolve my stability issues at 4.2Ghz+
My temps at 4.2Ghz in IBT were only topping at 70C which is fantastic since Prime95 never even breaks 60C now. This was with my vcore @ 1.34
Thoughts, Advice, Comments?
Thanks.
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