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Overclocking Dominator GT CMT8GX3M2A2000C9 - Page 3

post #21 of 28
You'll have to raise the QPI a bit. On SB chips, the IMC runs at the same speed as the core. You have significantly more stress on the IMC since you're running your memory higher.
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post #22 of 28
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx;13968953 
You'll have to raise the QPI a bit. On SB chips, the IMC runs at the same speed as the core. You have significantly more stress on the IMC since you're running your memory higher.

what's the max QPI voltage I should try and not to go over?
post #23 of 28
That I can't tell you. I've only played around with SB once. From that experience, my initial opinion is that you'll hit boot issues before it's "dangerous". Keep it under 1.35V and find out what it takes to pass. You shouldn't need anywhere near that much and honestly, if you can't get it to pass around 1.2V QPI, it might not be worth it to run 2133.


Really though, I don't quite know what I'm talking about on that subject tongue.gif
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post #24 of 28
Everytime that I mess with qpi, things start going wrong and it becomes very unstable. It's happened to me a few times with the P8P67 and I think i killed a gd-65 when i tried raising it.
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post #25 of 28
Thread Starter 
Quote:
Originally Posted by Mikecdm;13970292 
Everytime that I mess with qpi, things start going wrong and it becomes very unstable. It's happened to me a few times with the P8P67 and I think i killed a gd-65 when i tried raising it.

hmm maybe I'll just leave it as it is lol, maybe once I get that golden chip I'll play with it more but for now this is fine haha
post #26 of 28
You can try it, it's part of the learning experience. With SB, I really only mess with vcore and vdimm. The vcore part is easy. Trying to get ram to do what I want is where most of my issues have come. My hypers are terrible on SB. Initially all that I had were hypers. I tried running different straps and only the 1600 would work. I've booted at 1866, but very unstable. Then I start pumping vcore and nothing. In desperation, I start messing with qpi and then it starts getting unstable or in the case of the gd-65, it died.

Then I realized that my brother had some mushkins with that use PSC ic's. I figured they'd have to work better than my hypers. Those easily booted at 2133. Then i started raising bclk and messed with the timings some. The cpu does around 105.9 or so bclk. Trying to tighten timings, I started pumping vdimm upto 1.8v. After it didn't want to scale much more, I started messing with qpi. All of a sudden it doesn't want to boot at anything near 105 bclk, it gets bsod and then i get pissed off.
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post #27 of 28
Ok just 2 passes with memtest 4.2 all went well. 2x4gb modules CMT8GX3M2A2000C9 all 1.65v

2133mhz 9-11-9-24 1t (Raised VCCIO to 1.10v) Trying Auto Now..

1866mhz 8-9-8--21 1t (VCCIO Auto)

Now I have to pick one , any thoughts ??? eek.gif

I've tried quite a few & will keep at it. rolleyes.gif

All done on 4.5ghz Asus P8P67 Deluxe B3 , Modded 2001 Bios added Intel Raid opt rom 11.xx and ME Firmware 7.1.20.1119 . JMicron JMB362 Option ROM v1.07.28.

Custom Water Cooled .
Edited by getyasome - 10/19/11 at 5:27pm
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post #28 of 28
^^Necro?? create your own thread bud smile.gif

depends on what you'll be using the speed for, benching? maybe the 1866 will work better, other things which you won't really notice? the 2133 will work better.
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