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FX-8350 can't run Prime95 @ Stock Settings.

post #1 of 37
Thread Starter 
I've had this FX-8350 for about 3 weeks now. I've had it up to 4.8GHz @ 1.52v under an H100i with core temps never over 60C.

Highest stable setting I achieved was 4.6GHz @ 1.45v. "Stable" was 10 runs of IBT on High, Prime95 for 8 hours, and Folding@Home for days.

Now, at 4.2GHz @ 1.39V , it can run IBT no problem, but crashes Prime within 30 minutes and wont Fold.

NB at stock, RAM at stock (1866). RAM passes Memtest86 no problem. Gear is in my sig.

I've read several times that the FX chips are weird with Prime95, but I cant Fold either, and thats a problem.

Bad chip?
    
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post #2 of 37
Try running OCCT and see if it crashes that.
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post #3 of 37
yea sounds like it...my chip won't be stable after 4.6 and i got zalman lq320 (a bit worse than H100) and at 4.7 (1.424~1.475V) the max temp is 55 C but eventually a core will fail after like 15 min into p95. At 4.6 is stable ...I think we may hit the wall and no matter how much voltage I increase it won't be stable. Well, probably I should up my HT (currently auto at 2Ghz) and NB (2.2GHZ)?
post #4 of 37
Thread Starter 
Overclock walls aside, I'm having issues at stock speeds.

OCCT is running now, how long is considered decent with OCCT? I've not used it much before.
    
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post #5 of 37
Thread Starter 
Alright, so it ran OCCT for an hour, no problem.

Usually when I'm overclocking, I use IBT, Prime, then Folding. In that order. So I'm gonna start from scratch and see if I can somehow get back to 4.6GHz. I had really hoped for 4.8 with this chip but previous testing tells me that was never gonna happen. Not on this UD3 board anyway.
    
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post #6 of 37
These chips don't go well with Prime95. My 8120 used to do the same with a simple 300 MHz overclock.

Try Linpack or OCCT.
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post #7 of 37
Thread Starter 
Just doesn't seem right though. I mean, we've all been using Prime95 for years and then this new CPU comes out that cant run it?

I'm running IBT (Linpack) at the moment, so far so good. Still at stock settings though.
    
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post #8 of 37
Quote:
Originally Posted by Baskt_Case View Post

Just doesn't seem right though. I mean, we've all been using Prime95 for years and then this new CPU comes out that cant run it?

Well take it with a grain of salt, I read it on a forum somewhere and was trying to find the link since I posted.

However, when Prime gave me errors with my current overclock, Linx didn't, and since then I never had a crash.
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post #9 of 37
prime95 hates AMD FX
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post #10 of 37
Thread Starter 
Quote:
Originally Posted by vinton13 View Post

Well take it with a grain of salt, I read it on a forum somewhere and was trying to find the link since I posted.

Yea, you dont have to link it, I've read it myself quite a few times, on a few different forums. Just hard to wrap my head around it.

On a good note, IBT just passed on High. Gonna see if I can get 4.4GHz now. I'd really like to get this straightened out before the Foldathon this month.
    
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