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trying to break 4.00ghz stable

post #1 of 12
Thread Starter 
i have a e8400 with c0 stepping and i can top it out at 3.95ghz with the FSB running @ 1750. it seems that anything beyond 1700mhz for the FSB it starts to BSOD on me. after talking to a few of my friends they beleive tito be data loss due to the FSB being cranked to high. since i cannot unlock the multiplier (which would be amazing) is there a chip in the same series that has a unlocked multiplier? really dont want to make the switch to quad as i dont do anything other then gaming. i would prefer to keep the chip i have and hit 4.2-4.5ghz with it as the temps a REALY low right now (45c running wow/crysis/3dmark06), but have just hit a roadblock and its bugging me. i know people with the e8400 w/ c0 stepping that have broken 4.00ghz and i want to join the club.
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post #2 of 12
Try raising the voltage on the NB and SB
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post #3 of 12
Thread Starter 
ill have to check what their currently at, how much of a bump do you think i should give it though? (they are currently set to stock i beleive, ram and cpu i stepped up just a little bit and seemed to smooth things out to hitting the 3.95ghz mark)
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post #4 of 12
Try just one bump each on the NB & SB and see what ya got with P95
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post #5 of 12
Also bump the FSB to 1.3/1.4 on the 780i. This helped me stable at 4ghz
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post #6 of 12
Thread Starter 
i have a question for anyone that knows the evga 780i ftw board, when adjusting voltages the numbers show in either gray, red, or green. im guessing red is bad (but not 100%), does anyone know specificaly what the colors indicate? all mine are green atm.

set the fsb to 1780mhz, run prime95 and virtualy insta BSOD. just want to break 4.00ghz so bad. with the fsb at 1780mhz my cpu will be at 4.001ghz, so damn close.
Edited by Magariz - 2/19/09 at 3:22pm
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post #7 of 12
Thread Starter 
so i ran p95 with it at 3.65ghz and the fsb at 1700mhz. temps ran at 56c and had 0 errors and warnings after 8 hours. going to try 1750mhz fsb and see how that goes. ill also update tonight with what all my voltages are set at.
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post #8 of 12
Thread Starter 
voltages :
cpu core - 1.39v
cpu fsb - 1.25v
mem - 2.00v
spp - 1.45v
mcp - 1.60v
spp <-> mcp - 1.30v

FSB clocked to 1750mhz and cpu running at 3.937ghz
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post #9 of 12
I have te 750iFTW but their the same thing really. The grey area is considered undervolting because your running the CPU w/ lower volts that it is suposed to at that speed. Green is fine and you wana be in here as much as you can. Red area is the tricky part. When trying to get into the 4GHz zone you may need to go in their depending on the chip. I would say if you go in their you should never go past 1.6 vcore. If you need anything past that your really gona start running your CPU's life down and putting it at risk of an instant nuke. (Although I know some people who run at like 1.9vcore, thats crazy!)
post #10 of 12
Thread Starter 
im not seeing an option for vcore in the settings. i have vdroop off if that has anything to do with that. what do you think about the rest of my voltages as well? im running prime95 atm with is set to 3.937ghz to see how it does. ran perfect for 8 hours, 0 errors and 0 warnings at 3.68ghz (same voltages
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