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Cant get i7 930 stable @ 4.2GHZ on 1.4V!!

post #1 of 19
Thread Starter 
I was pushing 4Ghz with ease around 1.2875V's, Prime 95 Stable on a EVGA x58 motherboard. But Now at 4.2Ghz with 1.4V I cant get stable on Prime95 and get a BSOD within an hour. Temps stay under 85C @ load but I was hoping I could achieve 4.2Ghz under 1.39 V:confused:

201 x 21X
MCH Strap [DRAM Ratio]
CPU Clock Skew [300 PS]

CPU VCore [ 1.40V ]
CPU VTT [+225]
QPI 1.400V
DIMM 1.65V
IOH VCore 1.25
ICHVCore 1.2

All Power saving features, Speedstep, C1S etc are off.
What am I doing wrong? do i need moar volts? Trying to get to something safe for 24/7 use, mainly for gaming etc. confused.gif
post #2 of 19
4Ghz is enough for what you do. Every chip is different in terms of overclocking and it seems 4Ghz is the max yours can do.
    
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post #3 of 19
HT off ?
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post #4 of 19
Quote:
Originally Posted by TheBirdman74;15558757 
I was pushing 4Ghz with ease around 1.2875V's, Prime 95 Stable on a EVGA x58 motherboard. But Now at 4.2Ghz with 1.4V I cant get stable on Prime95 and get a BSOD within an hour. Temps stay under 85C @ load but I was hoping I could achieve 4.2Ghz under 1.39 V:confused:

201 x 21X
MCH Strap [DRAM Ratio]
CPU Clock Skew [300 PS]

CPU VCore [ 1.40V ]
CPU VTT [+225]
QPI 1.400V
DIMM 1.65V
IOH VCore 1.25
ICHVCore 1.2

All Power saving features, Speedstep, C1S etc are off.
What am I doing wrong? do i need moar volts? Trying to get to something safe for 24/7 use, mainly for gaming etc. confused.gif


Don't use 21x multiplier. Use 19 instead. You can also try 20x multiplier.

I have a i7 920 and can get 4.2ghz using a 19x but not a 21x.
     
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post #5 of 19
I have everything on including HT and I am 100% stable try increasing your multi to 24 and turn on HT then try to go for 4.2GHz.

EDIT: Also why is you QPI voltage so high?
     
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post #6 of 19
You will find that 4Ghz is easy to get to... but every Mhz after that will be a bit more of a undertaking in order to get it stable.

Personally I would leave it @ 4Ghz w/ the low volts then waste the life on the CPU and run high volts just for a unneeded 200Mhz more.

I used to run my 920 @ 4.2 on my X58 EVGA... w/ 1.4volts... complete waste imo - even with water it would hit 80c
post #7 of 19
What cooling are you using? I've got the whole MB on water with 1.425 vcore but it stays under 75 to pass prim95 so I'm happy enough.
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post #8 of 19
Thread Starter 
Quote:
Originally Posted by JetEnduro;15559522 
4Ghz is enough for what you do. Every chip is different in terms of overclocking and it seems 4Ghz is the max yours can do.

I know my chip can do more, its just that I am concerned about the insane amount of volts needed to break past 4Ghz. redface.gif
Quote:
Originally Posted by quakermaas;15559549 
HT off ?

HT is On
Quote:
Originally Posted by Balsagna;15559577 
Don't use 21x multiplier. Use 19 instead. You can also try 20x multiplier.

I have a i7 920 and can get 4.2ghz using a 19x but not a 21x.

But wont I then have higher Ram speeds confused.gif
Quote:
Originally Posted by nickbaldwin86;15559691 
You will find that 4Ghz is easy to get to... but every Mhz after that will be a bit more of a undertaking in order to get it stable.

Personally I would leave it @ 4Ghz w/ the low volts then waste the life on the CPU and run high volts just for a unneeded 200Mhz more.

I used to run my 920 @ 4.2 on my X58 EVGA... w/ 1.4volts... complete waste imo - even with water it would hit 80c

I agree, Kinda a waste since its ridiculous the amount of volts I require for only 200Mhz. But I am trying to get the most out of this chip without killing it. I am happy if it lasts me the next 2 - 3 Years. Its doing Under 85C
Quote:
Originally Posted by spud84;15559709 
What cooling are you using? I've got the whole MB on water with 1.425 vcore but it stays under 75 to pass prim95 so I'm happy enough.

I am using a H70, Its doing Under 85C @ 1.425V @ 4.2Ghz.
Quote:
Originally Posted by bigkahuna360;15559583 
I have everything on including HT and I am 100% stable try increasing your multi to 24 and turn on HT then try to go for 4.2GHz.

EDIT: Also why is you QPI voltage so high?

I followed bits of this guide - http://www.overclock.net/intel-cpus/538439-guide-overclocking-core-i7-920-930-a.html and it seems I need to increase the QPI to 1.4V+ to get it stable else I get BSOD. frown.gif

Currently running 4.2Ghz @ 1.425V and QPI 1.425 VTT at 175mV @ under 85C Load on Prime 95 as I type. What voltages would you recommend me tuning it down to? Where should the QPI be set to? Under 1.4V? How far can I go? What do you guys consider safe Volts for the 4.2Ghz Overclock on a D0 / i7 930 Chip?

+ Reps. Thanks Guys.

smile.gif
Edited by TheBirdman74 - 11/3/11 at 1:35pm
post #9 of 19
On my 920 it took 1.5v to get it linx stable @4.2. 1.4 doesnt seem reasonable to me for a 930, as I've heard those chips take more voltage than 920's clock for clock.
post #10 of 19
The i7-900 series cpu's are listed at 1.55v Absolute Maximum in the Intel Data Sheet, so dont be too afraid of core voltage so long as you can keep it cool

201897d1301047393-intel-i7-950-oc-life-time-absolute-max.jpg

http://download.intel.com/design/processor/datashts/320834.pdf - Page 22

I need 1.32 for 3.8, 1.36 for 4.0 and 1.41v for 4.2, so you will just have to try.

Also I have had alot of trouble getting stable past 185 BCLK on this motherboard, so take that into consideration.

Im not sure the multi on your chip, but if 22 is an option try it, otherwise I would try backing down on the BCLK a little at a time. Try 198, 196 etc.. until its stable
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