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i7 860 - computer won't POST when over 4,01 ghz

post #1 of 34
Thread Starter 
Hi!

I'm having a strange problem here... Like the title says, no matter what combination of cpu ratio / bclk I try, computer just refuses to post if I get over 4,01 ghz.

My current stable settings are:

21x191 - 4,01 ghz
Vcore - 1,344
VTT voltage - 1,249V
PLL - 1,853
DRAM 1,67 V
HT off
Default timings 9-9-9-24

My specs are:

i7-860
Asrock p55 pro / usb3
Corsair xms3 1600 4gb
Radeon HD 5770

Any clue why this is happening? Could it be that my CPU just can't take it?? My tems right now barely pass 70 at max stress..
Edited by dv986 - 2/3/11 at 8:16am
post #2 of 34
Thread Starter 
More info, from cpu-z:


post #3 of 34
Try increasing your VTT. I'd go 1.35 and see if it helps.
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post #4 of 34
Thread Starter 
Yeah, i already did, even over 1,4 though I know its not recommended. Didn't help.

However, what I did notice is that once I increase BCLK a bit more (198+), my chasis fan actually turns on, and normally when I go over 4,01 it doesn't turn on at all. Still won't post tho.
post #5 of 34
Quote:
Originally Posted by norcaljason View Post
Try increasing your VTT. I'd go 1.35 and see if it helps.
I looked at his voltages and thought the same thing. I run VTT @ 1.4V, but mine's an 870 and it's binned higher. (1.27V @ 4.1GHz? I don't see too many doing that.)

EDIT: ninja'd
 
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post #6 of 34
Is your RAM default 1600MHz, or is it only an XMP running it? If it's XMP, your RAM probably won't POST at ~1.65V+ or the frequency it is at. Try dialing back the BCLK and upping your multiplier with Speedstep enabled (24x)
 
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post #7 of 34
Quote:
Originally Posted by Nick0matic View Post
Is your RAM default 1600MHz, or is it only an XMP running it? If it's XMP, your RAM probably won't POST at ~1.65V+ or the frequency it is at. Try dialing back the BCLK and upping your multiplier with Speedstep enabled (24x)
Good call.

Not posting at all might be ram.

What speed is your ram? What divider are you using?
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post #8 of 34
Nevermind... I see your running 1600mhz ram, on a 4 divider. So you're actually underclocking it a bit.

Try the 3 divider to be sure.
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post #9 of 34
Thread Starter 
Thanks guys for the help. I did try running on a 3 divider... same thing happens. And yes, my RAM is 1600 default, and I don't think I'm running XMP. How can I know that for sure??
Edited by dv986 - 2/3/11 at 9:05am
post #10 of 34
you can also try making the command rate 2 instead of 1.
    
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