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Blck vs multipliers?

post #1 of 5
Thread Starter 
On the first Gen chips blck was the most important factor.. on the second Gen, I never see anyone mention blck... its all 45x 47x 50x etc... y?

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post #2 of 5
If you are referring to SB no one mentions it because intel developed the chips based on a locked BLCK of 100MHz and tied EVERYTHING onto it. So any increase to the BLCK and you run the risks of cooking your peripherals.

So when we OC ALL we can do is increase our multiplier. SB-E changed this and went with 4 locked multis that you could change between. But your mem was stilled tied to it so, for example, On my SB-E rig i was running 4.625GHz (125x37) but my mem (2133) would only run at either 2000 or 2333.

Im curious as to which approach they are taking with IB. I liked being able to fine tune my SB-E OC with the different BLCKs.
Edited by no_safe_HAVEN - 1/4/12 at 8:13pm
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post #3 of 5
Well now with socket 2011 they have brought back base clock overclocking due to it being full enthusiast platform.

On socket 1366, hopefully 2011 as well, overclocking using base clock would also positively affect GPU performance without directly having to overclock the GPU. It was actually quite nice.

There are a few members I am waiting on here on this forum to post some results they are going to be working on while testing that.

Abeeftec should be working on something like that. He will, when ready, probably post it under the Intel CPU forums. He's no.1 on Overclock.net socket 2011 overclocking list. I'm 8th ... darn lack of phase change cooling will make you lower on the list sigh ....
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post #4 of 5
Thread Starter 
I did not no this

On my 960 I had a blck of 175 and multi of 23..

On my sub I'm trying to get temps down and thought a multi of 45 and blck of 105 4.7ghz would give me cooler temps than a straight 47x

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post #5 of 5
Quote:
Originally Posted by JMattes View Post

I did not no this
On my 960 I had a blck of 175 and multi of 23..
On my sub I'm trying to get temps down and thought a multi of 45 and blck of 105 4.7ghz would give me cooler temps than a straight 47x
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They locked the PCI-E, DRAM, other buses, etc. to the BCLK with Sandy Bridge. Thus, by overclocking BCLK on Sandy Bridge, you're upping the all the links and other clocks as well... which causes stability issues quickly. I run my BCLK @ 105.0MHz and it's probably considered "high" to most people.
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