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I7-860 Overclocking Fail!!

Last response: in Overclocking
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May 15, 2012 6:14:20 AM

Hey guys,

I just got a gtx670 from my 5850 and it performs about 3x better in BF3, 3D Mark, but in SC2 it's not doing so well. I think my CPU may be bottlenecking so I'm trying to overclock it a bit. I been reading guides and threads all night and just tried it twice to get it to 3.8GHz, and both times my PC won't even start up until I reset CMOS. Can someone see what I did wrong? I keep seeing that 3.8GHz should be easy...Also is it bad for my comp everytime it can't start up due to overclocking?

1st try:
BCLK: 181 x 21
Disabled Turbo, C1E, EIST
RAM was at 7-7-7-24, volt 1.5 (auto)
Vcore 1.3, vtt 1.15, pll 1.8, pch 1.1

2nd try:
BCLK: 181 x 21
Disabled Turbo, C1E, EIST, C3/C6/C7, HyperThread
RAM 7-7-7-24 Volt 1.58
Vcore 1.35, vtt 1.2, PLL 1.9, PCH 1.12

MOBO: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
CPU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

More about : 860 overclocking fail

May 15, 2012 6:25:00 AM

Does your chipset support it? Also what is the normal clock and voltage for the cpu?
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May 15, 2012 7:08:33 AM

Try do it in little steps say 3.0Ghz first then do some test then continue to see how high you can go. It is an aging processor so it might not want to go as high as it used to be able.
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May 15, 2012 5:38:45 PM

Good idea I'll try starting with a lower point. My main concern is the voltages and I'm not sure what values are good to start with?

On auto, the processor is running at 133 x 21 = 2.8ghz. The voltage on auto is 1.25v.
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May 16, 2012 8:53:24 AM

Great news! I tried starting small this time and was able to so far achieve stability at 3.78Ghz. I know what I did wrong yesterday and it was due to the memory clock speed. I didn't realize that it was affected by the Bclock and didn't adjust memory multiplier accordingly, so I think it went to like 1800 Mhz and probably the reason I can't boot up at all.

Here are my current settings:
Bclock: 21 x 180 = 3.78Ghz
Turbo, 1E, 3E-6C (w/e those were), Hyperthread all disabled
Memory: 9-9-9-24. 1.66 Voltage. 2:8 multiplier = 1440Mhz
Vcore: 1.25V (same as stock Vcore)
VTT: 1.25V

Max Temp: 65C - Prime 95 with 10 mins so far

How does the three voltage value look to you guys? If I reduce VTT any more I will get BSOD on startup. I already reduced Vcore from 1.35V to 1.25V and haven't tried to go lower. Memory Volt is 1.65V and I don't have that value, so I chose 1.66V as some people did from other forums.

Thanks a lot for the help! I hope this speed upgrade will make a difference!
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!