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Gonna try a different overclock..

post #1 of 11
Thread Starter 
Ok guys, so i've made it to 4.2 ghz just by using the multiplier..been reading alot about using FSB to speed up cpu and ram...so....is there a chance i can get higher than 4.2 without upping the Vcore(its at 1.47) by a combination of fsb and multiplier??? Or will the fact that is is unstable at 4.3 on stock volts mean just that...and I can't push it any higher...and then of course i can't push the ram but so far too i guess...

And i've run Prime95 for 9 hours at 4.2 without any issues. Hottest it got was 53
post #2 of 11
The max temp for the 955 is about 62c. And the 965 has a higher stock vcore. So you might be able to push it a little further with no problems. How often are you running your CPU at full load?
What I would suggest first is getting some high quality TIM (make sure you apply it right.) And consider lapping your CPU. That should shave off some degrees. (Don't expect miracles though.)

I'd try upping your vcore to 1.5 and seeing if that helps. Just keep an eye on your thermals.

The whole point of having an unlocked multiplier is to be able to overclock just the processor and not touch the RAM freq.
You need to find out what the max clock of each component is and then go for a well rounded overclock.
I'm only experienced in OCing CPU and RAM though.

I'd suggest OCing just your CPU first until you find its limit. (BSOD) AND make sure your temps are still good.
Then OC your RAM (lowering your multiplier while increasing the ram freq to keep your CPU at the same speed but increasing your RAM speed.)
Do this until you find the max ram speed.

Then do the math and find out what multiplier and freq you need to get the most out of your RAM and CPU. And don't be afraid to adjust your voltages A LITTLE for stability.

Hope this helps a little.
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st0rm tr00per
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post #3 of 11
Thread Starter 
Thanks adam, I very, very rarely max out the cores. However, in the future I will be DVD authoring and video encoding, so that may impact my temps more.
post #4 of 11
Well I'm using a Phenom II 955 and it only takes me a MAX of 30 mins. to author a full length DVD. Thats with dual pass encoding and all the works while authoring.
so if your able to keep a sub 60c temp for 9 hours I would assume that your more than safe.
There are some good threads out there that go into more detail. But confining your OC to each component and THEN going for a well rounded OC is really the best way to go. Don't be too scared of BSOD. When you get one, just back down your OC a little.

But high quality TIM and lapping is well worth the time and money if your serious about OCing.
Quick lesson on lapping.
supplies: 3in. painters tape. picture frame. sand paper. (get a wide variety of grit. ranging from 600/800 to 2000 or more.)
use 3in painters tape to tape off pins on cpu to avoid getting metal dust between pins. 3in fits perfectly. tape lowest grit to the glass on the picture frame. (glass works good because its nice and flat). do about 10 strokes one way and then turn the CPU 90 degrees and do 10 more strokes. as you lap more and more switch out to higher grit sand paper. eventually your CPU will be perfectly flat. Use some kind of buffer agent and lint free cloth for mirror shine. DO the same for the heatsink base.
May sound hard, but it's not. I'm sure there's a few threads on here on how to do it in a lot more detail.

Cheers and good luck on your OC.
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st0rm tr00per
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post #5 of 11
Also try to make sure you run your CPU-NB higher as well because it provides a very noticeable increase in performance (memory). 2600mhz is a nice bump. Try to keep the HT as close to 2000mhz as you can. This post has a wonderful chart that helps keep some of the number straight: http://www.overclock.net/amd-cpus/59...ram-chart.html
 
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post #6 of 11
Have I told you about avoiding pairing 125W processors (especially overclocked) with unheatsinked 4+1 phase? I think I didn't, but in case I didn't...
1. Keep your processor at stock until you can add mosfet heatsinks.
2. Once you can add mosfet heatsinks, stay at 1.475V or below.

It's not as dangerous on this Gigabyte as it is on an MSI board, but I have heard of some cases of pushing it too far with this very specific board.

If you video edit/DVD author heavily (i.e. 5 hour long encodes/renders or even more extended periods of times, every day) you really should invest in a better board. The large amount of time your CPU (and VRMs) spend at 100% may degrade the VRMs to the point where they won't be able to reliably supply the 125-140+W anymore.
post #7 of 11
Quote:
Originally Posted by xd_1771 View Post
Have I told you about avoiding pairing 125W processors (especially overclocked) with unheatsinked 4+1 phase? I think I didn't, but in case I didn't...
*snip*
That board is 8+2 phase.
See here.

Phenoms love cold more than voltage. So work on your cooling before you try upping your voltages.
Edited by adamxatomic - 2/2/11 at 10:48pm
st0rm tr00per
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st0rm tr00per
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post #8 of 11
Curious what your Intelburn (G.Flops/s) test is on multiplier only? If you dont mind me asking.
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Yukikaze
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post #9 of 11
Quote:
Originally Posted by adamxatomic View Post
The max temp for the 955 is about 62c.
TJMax is 79C I thought - I'm on stock clocks atm, with a Hyper TX3, and I ran 10mins of LinX today to test before I start OCIng, got load temps of 59C. It's hot here, but surely it wouldn't get too close to TJMax at stock, especially with an aftermarket cooler?

As already stated, go as far as you can on the multiplier only, and up the voltage when required. Keep a close eye on your temps though, use two programs to monitor while stressing to ensure the displayed temps are accurate.
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post #10 of 11
I was talking about his board, the 880GM-UD2H. What you linked is my board.
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