Do I have a bad chip?

mikelkite

mikelkite

mikelkite

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21 Jun 2010
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226
So I have an i7 870 and some good ram,here are my specs:

i7 870 2.93
Asus P7p55D-Evo Motherboard
Geil Veloce 1866mhz 16Gb
Corsair h80i Cooler

I can manage to get 21x191 which is 4018mhz~ Ram at 2292mhz

I have tested the Ram with a low CPU clock, it is stable at that speed. When I use a 22 mmulti the CPU falls over as stated in the BSOD with core processor being the cause.

I cannot use 22x it seems it falls over.

Does anyone have experience with an i7 870? I see a lot of people posting their overclocks online but it seems none of them are stable past this speed.

I have tried to change the multi/bclk but any combo I use over 4Ghz becomes unstable.

The only thing I can think of it I have an Antec tru power 450w power supply. Do I have an under powered PSU for overclocking or do I have a bad chip?
 
some cpu's clock better on odd multi's and some even

just stick with a 21x multi and use a higher bclk

it might also help to run your ram slower around 1800mhz on p55,you should manage a 4.2ghz on the cpu
 
I gues sthe extra 200mhz is better for the CPU than to keep the extra on the ram I suppose.

Everytime I have tried to use more than 191 it falls over on a bsod though
 
what voltages are you using?

dram qpi I think its called on asus or dram vtt,you might need more around 1.3 to 1.35v

its for the memory controller,for 4.2ghz you might need around the 1.35v cpu voltage mark
 
I've played with voltage from 1.3>1.4 and found that if I use Auto it will give me abuot 1.4 when over 4ghz.

I think I just have a bad chip as I cannot find the right amount of voltage.

My friend has an 860 and it is 4.2 he uses auto on his settings and I have mirrored his volts, modified and nothing works.

I think its the ceiling of the CPU as I cannot get more than 21x, if I use 22 it fails over at 191, and if i raise the bclk it falls over.

Annoying but 4ghz will have to do.

Its not too shabby, but def the gfx card bottlenecking me now....
 
My old i5 760 did 4.2Ghz in a P7P55D-E Pro with a 200 bclk. That cpu also did not like the 22x multiplier even with a lower bclk. You can try my settings to try to get the bclk up if you like.

Settings for 4Ghz

BCLK 200x20
Vcore 1.28750v (might need more as i had a good cpu)
IMC 1.16250v
PLL 1.8625v
PCH 1.0875v

Settings for 4.2Ghz

BCLK 200x21
Vcore 1.375v (huge increase for 200mhz so i left it at 4Ghz 24/7)
IMC 1.3125v
PLL 1.900v
PCH 1.15v

All other voltages set to minimum or auto. Both spread spectrums disabled. Obviously you will probably need to tweak these settings for your own setup.
 
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