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[OFFICIAL] FX-8320/FX-8350 Vishera Owners Club - Page 488

post #4871 of 67222
Quote:
Originally Posted by ComputerRestore View Post

I've scaled my CPU/NB voltage from stock all the way to 1.35v. I also have CPU/NB LLC that I've tried different settings on to see if it would help. But it made no difference.
AMD's (out of date, I know, but it's the best I've got) overclocking guide mentions going up to 1.45V for CPU/NB for BD (on air/water cooling, much higher than that for ln2). So I haven't hesitated to go as high as I need to for stability. I'm currently running at settings that give me a measured CPU/NB of over 1.4V under load. My MB DEFAULTS to 1.4V for CPU/NB with my Ram speed. Much lower than that and I'm not stable enough for prime95 with my particular OC.

Maybe prime95 is more stressful of the IMC and the people that are having problems with it just need more CPU/NB volts??? Just guessing...
post #4872 of 67222
Quote:
Originally Posted by Stoffie View Post

Shame I feel sorry for you guys, I can get 4.7 stable at 1.41v but I am getting peeved because I can't get 5ghz stable.. you guys must be really losing the will....

Well I contacted AMD about an RMA, so I'll see what they say. I could just exchange it through the store I bought it at because it's been less than 2 weeks, but I'd rather follow-up through AMD so maybe they can improve on the design.

My 3rd Module (5 and 6) is unable to Clock over 4.7Ghz with any sort of stability. My lowest voltage at that setting is 1.4 (only 3 Modules active though). So I wonder what module of yours is failing Stoffie?

I think OCN is messing up - keep ending up double quoting myself and my posts when I go to edit lol.
Quote:
Originally Posted by rvaughn View Post

AMD's (out of date, I know, but it's the best I've got) overclocking guide mentions going up to 1.45V for CPU/NB for BD (on air/water cooling, much higher than that for ln2). So I haven't hesitated to go as high as I need to for stability. I'm currently running at settings that give me a measured CPU/NB of over 1.4V under load. My MB DEFAULTS to 1.4V for CPU/NB with my Ram speed. Much lower than that and I'm not stable enough for prime95 with my particular OC.
Maybe prime95 is more stressful of the IMC and the people that are having problems with it just need more CPU/NB volts??? Just guessing...

It doesn't explain why my other cores are able to clock higher with stability at the same settings. I even went as far as disabling cores 3 to 6. This left me with cores 1,2,7,8 with a setting of 4.6Ghz and cores 7 and 8 still failed. Yet I can use cores 1,2,3,4 and overclock to 5Ghz Prime stable.
Edited by ComputerRestore - 12/4/12 at 9:42am
post #4873 of 67222
What is a safe voltage and temperature for the NB? Other than cpuv, cpunbv and pll/vdda, is there any other voltage that needs to be raised assuming you are running your ram within its spec and the speed is supported by your cpu? I'm going to go back and see which workers quit on me and see where I can get with out them. Do the prime worker/thread numbers correspond to the core that it is being run on or are they random? After fiddling with all six of my cores running I can not get past 4.4ghz in prime, I r disappoint. Thats near 1.5v too.
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post #4874 of 67222
Quote:
Originally Posted by ComputerRestore View Post

Our CPU's are very similar. Yours being clocked at 3.5Ghz, and mine being clocked at 4Ghz stock frequency. They both seem only get a 500Mhz overclock with reasonable settings. (voltage/stability)
My 4.5Ghz overclock only takes 1.34v with Ultra High LLC. I never did check to see if I could get 4.6Ghz stable with more than 1.5v, but temps would be the primary issue at that point, for only 100Mhz extra lol. (It failed at 1.5v so I left it that, Socket temp was heading to 70+ anyways)

Hurm let me know I am considering RMA as well, but technicly I have no valid reason since it works as advertised.
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post #4875 of 67222
Quote:
Originally Posted by Jerm357 View Post

Are you guys still installing the Windows hot fix for these CPUs or does windows already have them from a Windows update? I have a FX8350 comming soon and Im not sure if I have to install it or not. If so is this the right update... http://support.microsoft.com/kb/2645594?wa=wsignin1.0

Come on guys you all have one of these CPUs. Did you install the hot fix???
post #4876 of 67222
Quote:
Originally Posted by KyadCK View Post

Think of it this way. Piledriver is the C3 of Bulldozer. tongue.gif

Quote:
Originally Posted by sdlvx View Post

A C3 that's going to be around for a very, very long time looking at the latest roadmap leaks. If you want to wait for whatever AMD has next for x86 enthusiasts, you're going to be waiting probably until 2014 unless something changes.
But, on a more positive note, I've been playing Far Cry 3 and I've noticed it uses 4 threads. At one point, I even saw total CPU usage go past 60%. Which means, 5 cores or more were being used.
I then turned around and fired up Planetside 2, to find out in only uses 2 cores and I see 25% CPU usage max. I promptly closed it and went back to Far Cry 3 just to re-assure myself I wasn't still back in 2010.

If thats the case, I should be picking one up soon here. I just have to close this server job at the end of the week and get paid thumbsupsmiley.png
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post #4877 of 67222
Quote:
Originally Posted by Jerm357 View Post

Come on guys you all have one of these CPUs. Did you install the hot fix???

Just for you when i saw your post yesterday i installed it.

If im honest ive not noticed any improvement etc

Take it or leave it is what i say
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post #4878 of 67222
Hey all. Got my 8350 today. It's running on stock volts at 4.5.
However it seems to be getting rather hot.
This is with a coolermaster hyper evo 212.

post #4879 of 67222
Quote:
Originally Posted by ComputerRestore View Post

Well I contacted AMD about an RMA, so I'll see what they say. I could just exchange it through the store I bought it at because it's been less than 2 weeks, but I'd rather follow-up through AMD so maybe they can improve on the design.
My 3rd Module (5 and 6) is unable to Clock over 4.7Ghz with any sort of stability. My lowest voltage at that setting is 1.4 (only 3 Modules active though). So I wonder what module of yours is failing Stoffie?
I think OCN is messing up - keep ending up double quoting myself and my posts when I go to edit lol.
It doesn't explain why my other cores are able to clock higher with stability at the same settings. I even went as far as disabling cores 3 to 6. This left me with cores 1,2,7,8 with a setting of 4.6Ghz and cores 7 and 8 still failed. Yet I can use cores 1,2,3,4 and overclock to 5Ghz Prime stable.

Something you might want to try:

Within Prime95's folder is a file called local.txt. This file basically tell how Prime95 is to be run. The settings you put in there overrides any detected settings.

You can play with these options:

NumCPUs=n
CpuNumHyperthreads=1 or 2

These two work together, it's designed for Intel CPU's with hyperthreading, but it will work the same with AMD. Sample, you can do NumCPUs=4
CpuNumHyperthreads=2

This tells Prime that it's a four Core CPU with hyperthreading, eight threads in total. This might help with your cores failing, so in essence for your core 7,8: core 7 will be primary thread and core 8 will be helper thread.

In conjunction with the other two I mention, or by itself you can try:
AffinityScramble2=string
Quote:
From Prime's undoc.txt : Where the characters in "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz()"
represent 64 logical CPU numbers. For example, let's say you have a system
with 8 logical cores with 4 workers each using a helper thread. Also, assume
your system has logical CPUs 0 & 4 on the same physical CPU core, 1 & 5, etc.
If the program is properly determining which logical CPUs share the same physical
CPU, then the program internally generates an affinity scramble string of "04152637".
The program's default policy is to assign the worker and helper threads to the same
physical CPU. If the program is not properly determining which logical CPUs share the
same physical CPU, or you think a different affinity policy would result in better
performance, then set AffinityScramble2 accordingly. Let's say you think
running the helper threads on a different physical core would be better, then
you might set AffinityScramble2=02134657 to test out your theory.

By default the Piledriver cores should be:

AffinityScramble2=01234567

You can play with these settings to see if matching different cores help. Sample you can match core0 with core3 or core 5 with core 7,
This example would be: AffinityScramble2=03124657
post #4880 of 67222
Quote:
Originally Posted by laurie View Post

Hey all. Got my 8350 today. It's running on stock volts at 4.5.
However it seems to be getting rather hot.
This is with a coolermaster hyper evo 212.

These chips do run hot and im afraid you need a better aftermarket cooler than that one. I know im blunt but its the truth It just wont cut it with a 8 core chip
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