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From 4 to 2 Dimms - WHAT A Difference!!

post #1 of 15
Thread Starter 
While I had 4 dimms installed, my wall was 3.6GHz at 1.4v. And even that was unstable. Absolutely nothing I did in the BIOS would allow me to run stable. After I removed 2 of the dimms, this is what I was able to get. 1.38v:



Update -

I found out I can run 3.6GHz at 1.24v, so that'll probably be what I run 24/7.

Now here's the odd thing,

After I got everything the way I wanted in the BIOS, I saved it and turned the machine off. Just to see what would happen, I decided to try and add the other 2 dimms I had taken out earlier.

And to my surprise, it booted up no problem. Now I've been running Prime95 for about 8 hours, and it's looking strong. How do you explain that??

Before with 4 dimms I could barely even boot at these settings. Now it's running Prime for hours on end??
Edited by .Andres - 10/8/11 at 8:18am
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post #2 of 15
I thought that didn't happen anymore.....how about with Sandy Bridge?

(I was considering more ram but after this.....maybe not!)

Anyways, congrats on OC, its nice to get little pleasant surprises like that.
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post #3 of 15
It's possible as it'll strain the IMC less. Usually using 4 dimms stress's the IMC more than 2 dimms. With sandybridge however it is a littl different, I have seen some amazing overclocks even with all dimms populated.
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post #4 of 15
Thread Starter 
Quote:
Originally Posted by railfan844 View Post
I thought that didn't happen anymore.....how about with Sandy Bridge?

(I was considering more ram but after this.....maybe not!)

Anyways, congrats on OC, its nice to get little pleasant surprises like that.

I thought so too man, but the difference was like night and day! Nothing I tried allowed me to be stable, even with the ram heavily underclocked. QPI/VTT voltages, vdimm, vcore, clock drive, clock skew, nothing.

And thanks! Although I don't plan on running 4.2GHz 24/7, I'm just happy to know it can get there.

But I think even more astounding was the fact that I was able to boot right into 3.8Ghz at a mere 1.25v. I think I'll try to get my 24/7 settings around that.
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post #5 of 15
Quote:
Originally Posted by .Andres View Post
3.8Ghz at a mere 1.25v
:O

And I've been telling people this hasn't happened since 939.....
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post #6 of 15
oldnewsisold
post #7 of 15
Awesome work on the hackintosh. Fewer modules/DIMM stresses the IMC to a lesser degree...
 
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post #8 of 15
Quote:
Originally Posted by blindrage606 View Post
awesome work on the hackintosh. fewer modules/dimm stresses the imc to a lesser degree...
I'm jealous of his working Lion install too with QE/CI.....but......

DO NOT SAY THAT WORD!!!
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post #9 of 15
Thread Starter 
Quote:
Originally Posted by railfan844 View Post
I'm jealous of his working Lion install too with QE/CI.....but......

DO NOT SAY THAT WORD!!!
Thank you.

All I will say is that it's installed straight from a legal copy Snow Leopard purchased at the Apple Store, and Lion is straight from the app store.

Now, since it's against the TOS to discuss this matter, lets continue on with the original subject.
Edited by .Andres - 10/7/11 at 9:42pm
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post #10 of 15
I know, i know. This is actually my best i3 OC with 4 RAM sticks. After changing them all for 2x4 GB sticks (i refused to give up my 8 GB RAM), you can check the new ones on my sig. Quite the change
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