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NB now at ~3000Mhz! - Page 4

post #31 of 36
Quote:
Originally Posted by xd_1771 View Post
Interesting results.
Are you running mosfet heatsinks on that motherboard? 4+1 + x6 overclocked isn't too optimal, though you're well below 1.475V and with heatsinks it'd be a lot safer (plus Gigabyte VRMs are usually of quality anyway)
This boards has proven to be one tough partner so far ^^ . Though what you say is completely true, and thus, my 24/7 overclock is 3.93 @ 1.4v . 1.4 is quite safe and I have been running this settings for a few months. I use my 4.12 OC just for benching ( 100mhz is not gonna make much difference in games anyways) Plus as you said Gigabyte VRMs are quality !!

Quote:
@luches: Interesting to see that actually much looser timings on a tad faster speeds lead to such increases in performance. Guess we still have things to discover in the memory settings world
That opposes to the common knowledge fact that lower speeds and tighter timings do make a difference in AMD, well, you've just proven the contrary
I usually go for a balanced setting. Not too tight to have to sacrifice frequency, and not too loose. Besides, we all now that CL is the main factor. If you can sacrifice a few number of other factors ( not too much), and get a higher frequency, while still keeping the CL 6 the result should be better ( that's what I thought).So, I started testing and not surprisingly it proved to be true .
Common knowledge is vital, but I prefer to rely both on my own experimentation + common knowledge
Edited by luches - 2/5/11 at 3:56am
post #32 of 36
hmm... that's pretty bad ass
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post #33 of 36
That 11000 run I was at 1.73, but I run my 6-6-6-18 and 10700 benchmark (and normal day to day) at 1.71v. Stock is 1.65 so I'm not overdoing it by too much. Waiting to get my new case and the GT 2150's and hopefully my temps will drop some more so I can do a full stability test.
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post #34 of 36
Thread Starter 
Just be wary of those MOSFET temps, you don't want to end up with that blow up 3 months later as a result of VRM degradation
Gigabyte VRMs are usually of quality, but I now realize that the power phase area is very small and cramped on that board (= more heat) and the MOSFETS are actually not low RDS. They also seem to use the "cheaping out" third transistor method rather than a proper MOSFET driver. I highly recommend adding MOSFET heatsinks on that board for any serious clock pushing. I also looked at the CPU support list; while a lot of 4+1s are now rated 140W even by Gigabyte, looks like that one is it. Since 125W is theoretically the limit and you're bringing it past that, I'd consider that you're now edging onto the dangerous side of things. Get those MOSFET heatsinks, boi!
Remember, the x6 is usally the most stressful AMD CPU on the VRMs.
Edited by xd_1771 - 2/5/11 at 11:23am
post #35 of 36
does upping the NB that much really increase performance?
post #36 of 36
Quote:
Originally Posted by xd_1771 View Post
Just be wary of those MOSFET temps, you don't want to end up with that blow up 3 months later as a result of VRM degradation
Gigabyte VRMs are usually of quality, but I now realize that the power phase area is very small and cramped on that board (= more heat) and the MOSFETS are actually not low RDS. They also seem to use the "cheaping out" third transistor method rather than a proper MOSFET driver. I highly recommend adding MOSFET heatsinks on that board for any serious clock pushing. I also looked at the CPU support list; while a lot of 4+1s are now rated 140W even by Gigabyte, looks like that one is it. Since 125W is theoretically the limit and you're bringing it past that, I'd consider that you're now edging onto the dangerous side of things. Get those MOSFET heatsinks, boi!
Remember, the x6 is usally the most stressful AMD CPU on the VRMs.
OK, I have a biostar VRM cooler nearby. I will use it till bulldozer comes out. Board upgrade is a waste of money, since bull is just around the corner ^^


EDIT : I did some test on NB frequency this afternoon and results were unexpected !! I'll create a separate topic for that in a few minutes . Always aiming for lowest timing could be a wasted effort !
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