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Impossible to get my 2600k Prime95 Stable?

post #1 of 9
Thread Starter 
Im trying to get my 2600k stable with prime 95. I had my cpu at 5ghz 1.52v, and it did not crash at all, however in prime 95, workers stopped running, so then i went to 4.8ghz 1.46v, still all workers stop working.
Settings:
Multi:48
LLC:Ultra High
VRM Freq: 350(manual)
All other in that spot is extreme
CPU PLL 1.7625
Voltage 1.46
CPU Spectrum Disabled
Other on Auto
CPU Power Settings:
Turbo Disabled
Speedstep Disabled
C1E Disabled
C3 Disabled
C6 Disabled
HT On
Bios: 1850
Plz why cant i get prime 95 stable?
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post #2 of 9
So the workers are stopping and showing you errors? If so, I do not believe it is the CPU, because it would most probably BSOD if too little Vcore. I suspect your RAM.

Try setting your RAM timings manually to stock. Also try to set Command Rate to 2t. At Auto it can default to 1t. Not all mem likes it at 1t.

If that does not work, try setting VCCIO to 1.150 Volts.

Also, make sure RAM is running at their rated volts
Edited by turrican9 - 7/17/11 at 4:31pm
    
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post #3 of 9
Thread Starter 
will try now. Thank you.
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post #4 of 9
Like turrican9 said: when you are oc'ing your cpu, oc just the cpu--keep your RAM at, very close to, or just below stock speeds. Take your memory completely out of the TroubleShooting loop.

Once you get the cpu stable, go back and oc the RAM knowing it's going to be the RAM voltage or NB to get it stable.

And 1.52v..?
 
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post #5 of 9
I always rock my ram at 1333 with loose timing till I get the cpu dialed in. That being said, not all Sandy Bridges can hit 5ghz stable.
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post #6 of 9
Thread Starter 
wow, so far 4.8 is stable at 1.4. WOW great improvement on voltage/temps. Must of been the ram. ty all, all getting a rep that is well deserved from me!
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post #7 of 9
Yea, my 2600K has to be at 1.5v for stable prime. I ran 1.47 and was able to game all night and run multiple passes of 3DMark11. I like the temps better at 1.47, but for a truly "stable" clock, I need to up the volts. Some would argue that it doesn't matter, but others around these parts would say "shame"!
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post #8 of 9
Keep up the good work. Just remember.
#1 OC cpu, test for stability; Small FFTs (once stable)
#2 OC the RAM, test for stability. memtest (once stable)
#3 Run a Blend Test, to ensure everything is gelling.
 
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post #9 of 9
Thread Starter 
i did run a memtest overnight for my ram, thats why i didnt think of it being unstable lol, must of missed something
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Crucial M4 256GB WB 4TB External USB 3.0 HDD XSPC Raystorm CPU Water Block, 2x AX 480 Radiat... Windows 8.1 Pro 64Bit 
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