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post #341 of 650
Quote:
Originally Posted by Franzie View Post
well, *uncore* means: (for i7 9xx) memory controller, L3-cache.
if you overclock this one, you will get a dramatic memory performance increase.
Is there a danger in ocing the uncore? Also what voltage(s) would you need to increase when playing around with the uncore?
     
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post #342 of 650
No danger involved with overclocking it, assuming the voltages you use are safe.

To raise it, you'll need to increase the QPI/VTT voltages and possibly the DRAM voltage.

For benching with Westmere (your 980X), it's recommended to keep QPI/VTT around or below 1.55V QPI/VTT. DRAM can be anywhere within 0.5V of that, so up to 2.05V if your sticks are up to the task (I like to keep mine below 1.95V). Westmere is particularly picky about QPI/VTT voltages though. Sometimes it doesn't like to boot above 1.45V or so but it all depends on the chip. For benching with Nehalem (920, 930, etc.) it's usually recommended to keep QPI/VTT around or below 1.6V.

Realize these voltages aren't for those afraid of killing chips. While they most likely won't do any immediate damage, there is the possibility that you have a chip that will commit suicide as the voltages go up. Many people are scared to go above 1.65V on the memory but that was just a fear caused by the ES versions of the Core processors. There have been very few reported deaths since the early revisions and most of them involved a large difference (0.5V<) between the memory (DRAM) and uncore (QPI/VTT) voltages. The memory itself (DDR3) can handle up to about 2.2V-2.3V without dying, depending on the individual IC's. Many do not see a performance gain above ~1.9V or so without actively cooling them (subzero), so if you're pushing them for fun, quit when the sticks stop scaling.

For 24/7 on both Nehalem and Westmere, I prefer to keep my QPI/VTT under 1.4V and my DRAM under 1.72V. You will not kill anything at these voltages, but as a general disclaimer if you happen to do so, I gotta say it's not my fault! You are voiding warranties (overclocking at all is voiding warranties).
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post #343 of 650
Quote:
Originally Posted by xxbassplayerxx View Post
No danger involved with overclocking it, assuming the voltages you use are safe.

To raise it, you'll need to increase the QPI/VTT voltages and possibly the DRAM voltage.

For benching with Westmere (your 980X), it's recommended to keep QPI/VTT around or below 1.55V QPI/VTT. DRAM can be anywhere within 0.5V of that, so up to 2.05V if your sticks are up to the task (I like to keep mine below 1.95V). Westmere is particularly picky about QPI/VTT voltages though. Sometimes it doesn't like to boot above 1.45V or so but it all depends on the chip. For benching with Nehalem (920, 930, etc.) it's usually recommended to keep QPI/VTT around or below 1.6V.

Realize these voltages aren't for those afraid of killing chips. While they most likely won't do any immediate damage, there is the possibility that you have a chip that will commit suicide as the voltages go up. Many people are scared to go above 1.65V on the memory but that was just a fear caused by the ES versions of the Core processors. There have been very few reported deaths since the early revisions and most of them involved a large difference (0.5V<) between the memory (DRAM) and uncore (QPI/VTT) voltages. The memory itself (DDR3) can handle up to about 2.2V-2.3V without dying, depending on the individual IC's. Many do not see a performance gain above ~1.9V or so without actively cooling them (subzero), so if you're pushing them for fun, quit when the sticks stop scaling.

For 24/7 on both Nehalem and Westmere, I prefer to keep my QPI/VTT under 1.4V and my DRAM under 1.72V. You will not kill anything at these voltages, but as a general disclaimer if you happen to do so, I gotta say it's not my fault! You are voiding warranties (overclocking at all is voiding warranties).
Thanks so much! This is good stuff. +Rep.
     
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post #344 of 650
Quote:
Originally Posted by xxbassplayerxx View Post
Realize these voltages aren't for those afraid of killing chips. While they most likely won't do any immediate damage, there is the possibility that you have a chip that will commit suicide as the voltages go up.
I just killed my 920, lol. It was scared!
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post #345 of 650
Here is my Q9550 @ 4.42GHz and 520MHz FSB on P5Q Pro..

Kingston HyperX 1066MHz 2x2GB KHX8500D2K2/4G CL5 @ 1040MHz 5-5-5-15, Performance level=10..



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CHEERS..
Edited by KingT - 1/26/11 at 3:28pm
     
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post #346 of 650
is maxmem freaking out on me?
post #347 of 650
The only number on there that's bad is the latency (and the overall score because of it). Did you try running it a few times?

Quote:
Originally Posted by NoGuru View Post
I just killed my 920, lol. It was scared!
Hopefully not using what I said above, right??
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post #348 of 650
I usually find the latency is a tiny bit lower in everest than maxxmem, but not that much. Maxxmem does freak out now & then.
    
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post #349 of 650
ehhh ran it like 10 times, heres the score that came up the most.
post #350 of 650
Your maxxmem looks pretty close to mine for latency, you are running a bit faster cpu with higher uncore

    
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