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AMD Bulldozer and Piledriver Overclocking Guide - Asus Motherboard - Page 17

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post #161 of 4095
I can't remember if you answered my question or not but on my Hyper 212+ I was able to drop the fan down on the cooler a bit so that some air blows below the cooler's fins and into the VRM area. I also had fliped the case's top fans to blowing inward onto the VRM area as well.

And then there's ComputerRestore's idea as well which is getting more common. I've actually made a fan mount out of aluminum, bolted it just above the IO area.
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post #162 of 4095
Quote:
Originally Posted by ComputerRestore View Post

I made a picture on how to place the fan on the VRM heatsink. It's pretty crude but I hope it helps.



Your temps do still seem high for a 6 core FX. Did you clean the CPU and the Heatsink surface with Rubbing Alcohol? The Cooler Master heatsinks usually come with a sticker that leaves a thick glue on the mounting surface. If not, then I would clean them and when you re-assemble everything, use the Pea Size Dot of TIM on the CPU and then let the weight of the CPU cooler squish it out as you install it.

I used isopropanol to clean the CPU and cooler base, I cleaned it very careful. I think i will reinstall it once more some day.

I just installed the little fan like you suggested, raised voltage to 1.406V, 4500mhz and tried Intel Burn Test. It went through with no errors. Temps: Core 58C and Socket 62C
Then I tried Prime95 small FFT for ten minutes and got also 0 errors! Temps: Core 61C and Socket 64C. Core temps are too high but socket seems OK now I think.
It was definitely worth it to put the fan like you said. I'm happy now if computer doesn't freeze during gaming. I don't think core temps are going so high while playing but I'll be careful. Thank you once more!
Edited by Peckafo - 3/7/13 at 10:30am
post #163 of 4095
I decided to post this here given the ASUS mobo theme.

I ran into this Vishera performance scaling thread that seems to suggest non-linear scaling when overclocking.

I wanted to try and verify this, and add to it by including the Northbridge as well. To do so I decided to use All Benchmark - Tiger. Video card remained at stock across all tests.

Caveat: I did not run a significant number of iterations for each set of parameters. With that in mind I would only look at trends, as opposed to individual scores.

Testing setup:
8350
G. Skill 1600 9-9-9-24
MSI 7950 - 880/1250

Overclocks were done using multiplier only. Each OC was minimally Prime stable, ~10mins Blend.
Warning: Spoiler! (Click to show)

LL

LL



Overall, this did not confirm the "sweet spot" hypothesis, but it does seem to show that overclocking the Northbridge has limited gains on its own. However, NB overclocks can increase performance and improve scaling when combined with CPU overclocks.

Sweet spots may exist around 4.2, and between 4.5 - 4.6, when combined with a mild NB OC'd to 2400.

I will try to follow up on these, but it has made me re-think how I OC my system.
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post #164 of 4095
Did you keep the same RAM speed in each of the tests?
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post #165 of 4095
Quote:
Originally Posted by Krusher33 View Post

Did you keep the same RAM speed in each of the tests?

Only changes were the variables being investigated, core speed and NB.

All other settings stayed the same.
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post #166 of 4095
need help ocing as i can't get my system stable. Windows 7 Freezes when i oc. I have a FX 8320 & a ASUS M5A997 EVO
 
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post #167 of 4095
Quote:
Originally Posted by BenC View Post

Quote:
Originally Posted by Krusher33 View Post

Did you keep the same RAM speed in each of the tests?

Only changes were the variables being investigated, core speed and NB.

All other settings stayed the same.

What I'm curious is... upping NB and upping RAM synchronously. Just something about AMD's OC guide saying NB = Memory speed makes me curious. I understand that RAM speed probably doesn't affect scaling directly.
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post #168 of 4095
I will try and add differing ram speeds when I have time.

Unfortunately the G skill Sniper I have will not go above ~1770 and remain stable.
Quote:
Originally Posted by Durvelle27 View Post

need help ocing as i can't get my system stable. Windows 7 Freezes when i oc. I have a FX 8320 & a ASUS M5A997 EVO

Have you read the guides on the first page? That is an excellent place to start.
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post #169 of 4095
Thread Starter 
Quote:
Originally Posted by BenC View Post

I decided to post this here given the ASUS mobo theme. Warning: Spoiler! (Click to show)
I ran into this Vishera performance scaling thread that seems to suggest non-linear scaling when overclocking.

I wanted to try and verify this, and add to it by including the Northbridge as well. To do so I decided to use All Benchmark - Tiger. Video card remained at stock across all tests.

Caveat: I did not run a significant number of iterations for each set of parameters. With that in mind I would only look at trends, as opposed to individual scores.

Testing setup:
8350
G. Skill 1600 9-9-9-24
MSI 7950 - 880/1250

Overclocks were done using multiplier only. Each OC was minimally Prime stable, ~10mins Blend.

LL

LL


Overall, this did not confirm the "sweet spot" hypothesis, but it does seem to show that overclocking the Northbridge has limited gains on its own. However, NB overclocks can increase performance and improve scaling when combined with CPU overclocks.

Sweet spots may exist around 4.2, and between 4.5 - 4.6, when combined with a mild NB OC'd to 2400.

I will try to follow up on these, but it has made me re-think how I OC my system.


Great work BenC. That is very intersting indeed.
post #170 of 4095
Quote:
Originally Posted by BenC View Post

I will try and add differing ram speeds when I have time.

Unfortunately the G skill Sniper I have will not go above ~1770 and remain stable.
Have you read the guides on the first page? That is an excellent place to start.
Yes found out the problem was voltage. I was able to get 4.4GHz stable at 1.380v
 
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