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Cant get i7 930 stable @ 4.2GHZ on 1.4V!! - Page 2

post #11 of 19
Thread Starter 
Hey, Thanks Bud smile.gif Its a i7 930 like yours so they have a multi of 22 with Turbo but everybody says 21 is the best. I can do 4Ghz @ 1.2850V but 4.2 Requires a massive 1.4V +. confused.gif So do you think I am safe up to 1.4 - 1.425 on the Vcore as long as I am under 90C for daily / 24/7 Use for Gaming etc? I am stable for 3 hrs and counting on Prime 95 doing around 85C @ 1.425 on the QPI and 1.425 on the Vcore and 175mV on the VTT. I see you got the same processor and voltages and overclocks as me and. We also share similar motherboards. What are your settings

I saw that data sheet but a bit worried about the temps and volts. I want this thing to last be another 2 -3 years. tongue.gif

Replied to your PM too btw.
Thanks a lot. +Reps thumb.gif
Quote:
Originally Posted by 10acjed;15560452 
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
post #12 of 19
To the OP, what's your batch number? Later batches like mine suck. See my sig...9 th week of 2010. The guy with the 950 appears to have a late batch as well. Early 930s could do 4.0 comfortably at under 1.2. The later batches seem to not have the headroom. Also concerning max volts per intel data sheet, that's absolute max. Intel states the functional max is lower, but doesn't specify. Above functional max for long periods will lead to degradation. Maybe set volts to 1.4 and take whatever max overclock you can get. Personally, I would limit volts to 1.375 for long term, but that's just me. Good luck! For the record, I have not yet achieved 4.0 stability at 1.2625 with LLC2 enabled. I think 1.275 may be the ticket based on another report of my batch.
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post #13 of 19
I run 4.ghz. 24/7 with 1.28 volts 200 X 21 multi, I run my ram at stated speeds (1600)

I agree with others that for your setup 4.2 is not really needed, I only need mine for
SC2 (I get lag in campaign mode at lower speeds)
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post #14 of 19
You may need to turn HT off for 4.2. Gaming performance goes up with HT off anyway - see the link in my sig. Stick with 21x, from what I understand, its odd multipliers than give problems sometimes.
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post #15 of 19
Thread Starter 
I seem to be able to push it 4.2Ghz with 4.1 - 4.25 on the VCore. Temps stay in the mid 80's - late 80's in Prime 95. Should I push it more? Like 4.4Ghz with 1.45 or more? Is 1.45 at the VCore safe for 24/7 without killing my chip too early? Or Should I just call it a day at 4.2Ghz and tune that overclock?

Quote:
Originally Posted by breenemeister View Post
To the OP, what's your batch number? Later batches like mine suck. See my sig...9 th week of 2010. The guy with the 950 appears to have a late batch as well. Early 930s could do 4.0 comfortably at under 1.2. The later batches seem to not have the headroom. Also concerning max volts per intel data sheet, that's absolute max. Intel states the functional max is lower, but doesn't specify. Above functional max for long periods will lead to degradation. Maybe set volts to 1.4 and take whatever max overclock you can get. Personally, I would limit volts to 1.375 for long term, but that's just me. Good luck! For the record, I have not yet achieved 4.0 stability at 1.2625 with LLC2 enabled. I think 1.275 may be the ticket based on another report of my batch.
I cant remember but I did a google on it when I first got it and I think they said that it was a pretty good batch. I can Do 4Ghz Stable (21x200) @ 1.28750 and stays around 65C at load. Maybe you Should try that.

Thanks everyone. +Reps.
post #16 of 19
Quote:
Originally Posted by TheBirdman74 View Post
I seem to be able to push it 4.2Ghz with 4.1 - 4.25 on the VCore. Temps stay in the mid 80's - late 80's in Prime 95. Should I push it more? Like 4.4Ghz with 1.45 or more? Is 1.45 at the VCore safe for 24/7 without killing my chip too early? Or Should I just call it a day at 4.2Ghz and tune that overclock?



I cant remember but I did a google on it when I first got it and I think they said that it was a pretty good batch. I can Do 4Ghz Stable (21x200) @ 1.28750 and stays around 65C at load. Maybe you Should try that.

Thanks everyone. +Reps.
21x200 is 4.2
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post #17 of 19
By any means keep it at 21x. It is the most stable after 4.0 and requires the least vcore due to the slightly lower bclk.
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post #18 of 19
Thread Starter 
Quote:
Originally Posted by DBEAU View Post
21x200 is 4.2
sorry, i meant 21x191 =4ghz @ 1.2875.
post #19 of 19
The difference between 4.0 & 4.2 is hardly noticed, your temps are a bit high for my taste now, I like to stay 80c and below.

Finding a voltage jump when overclocking is very common though, there are alot of times where a CPU will run good at low voltage up to a point that it needs a big jump in voltage to clock higher.
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