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AMD FX-8120 Fast at first, now performance issues, any ideas?

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September 7, 2012 10:31:17 PM

Hi All - does anyone know of any issues with the FX-8120 cpu? We built a system with a GA-970A-UD3, 32gb of Crucial ram, 1tb Seagate Barracuda SATA-600, Cooler Master 550w, XFX 6670 2gb video. System ran great for 2 weeks, amazingly fast, fast boot times, AutoCAD & Outlook ran fast, etc. Customer returned complaining that it went from fastest computer ever to slower than dual core systems. We've swapped power, memory, cpu, motherboard, hard drive (brands & models changed of each) and basically if we swap out to a FX-6100 them system runs great again. (we're basically looking at boot times, and AutoCAD startup and performance and Outlook performance). Everytime we go back to a 8120 system runs bad again. Temps, Voltages all look good running bios defaults & 1333mhz ram. Latest (and not latest) bios for board, all windows updates, malware/virus/rootkit free. Know there were some hotfixes for Win7 64bit, are there other unofficial hotfixes or anyone have any ideas why 8120 on a 970A chipset runs so bad?
a b à CPUs
September 7, 2012 10:49:49 PM

Latest GPU drivers? Try the hotfixes. They do help.
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a b à CPUs
September 7, 2012 10:50:29 PM

Is it Windows 64bit or 32bit?
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a b à CPUs
September 7, 2012 10:59:34 PM

Do you see all cores in the resource monitor? And while AutoCad loads do they work? Anything in EventViewer that points to the problem? Try http://www.hwinfo.com/ or any other tool to monitor the core frequency.
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a b à CPUs
September 7, 2012 11:15:49 PM

Does it run slow everytime you go back to a (as in any) 8120 or the same (as in the one shipped with the system) 8120?

You tried different boards, right? Also tried different chipsets?

Tried an 8150?
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a b à CPUs
September 7, 2012 11:36:58 PM

If your temps are ok, try disabling cool 'n' quiet in the BIOS, or anything else that will throttle down the CPU under certain conditions.
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September 15, 2012 2:55:19 PM

Hi all, we found it was a defective CPU, changing for another 8120 fixed all the problems. Guess a couple of the cores went bad. It's so rare for CPUs to go bad, I didn't want to believe it!
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