i5 2500k OC'd cause for HD7950 graphics crash?

Hi all! Firstly want to say thanks for the wealth of knowledge and help ive found on here over the years and the lack of critisicm / trolling!

Had a reccuring problem with my PC whereby after a few minutes of system idle the HD7950 graphics shut off / no signal. I then have to shut down the PC, disconnect the GPU power supply (sometimes pull the whole card), reboot PC on iGPU / VGA. I then get a message on desktop from 'GPU Tweak' saying "fail to load dlls, please install VGA driver"

9 times out of 10 if i then shut down PC again, reconnect GPU and reboot it works fine again. It will be faultless all the while its running (EG. FARCRY3 highest quality or just pottering about emailing)

Ive tried all the available Asus ATI Radeon GPU drivers every which way

My system which has been uber stable - no probs, nice temps, runs prime95 forever is;

Asus P8Z77 mother bios 1708
i5 2500k with zero infintity phantom cooler
Antec 850 PSU
Corsair vengeance 4x 4gb ddr3 1600mhz ram
Intel SSD 330 hardrive

Only OC changes to default currently are;
AI overclock - XMP mode
BCLK/PEG - 100
CPU RATIO - 44
Mem Freq - 1600
CPU voltage - 1.275
LOADLINE - auto

I initially thought the prob was because i was overclocking with a lower CPU Ratio and upping the baseclock to achieve 4.4ghz, so retuned with std baseclock of 100

Is this an OC / GPU sync problem? clockspeed errors or am i missing something much simpler!?

Thanks for your time
16 answers Last reply
More about 2500k hd7950 graphics crash
  1. Hi there, I'm just wondering are you receiving any errors when you lose the gpu's signal? What exactly do you mean by lose signal as well? Is it not viewable in your hardware list or it just won't rev up? Also, download HWinfo64, boot the program, run sensors only. Then launch FC3 and run around for abit. Page out and check HWinfo, see where your gpu utilization stands and come back here (also check your cpu utilization percent as well). I'll check back momentarily. :)

    EDIT: When you reinstall your drivers make sure you are doing a clean install. You can use Revo Uninstaller to scan and find registry entries and all remaining files, it can be very helpful.
  2. Should work fine with the settings you've given - changing the bclk on a LGA1155 platform can screw up peripherals though, so multiplier is the way to go.

    Have you run memtest? It could be RAM.

    Also, ASUS drivers aren't always the latest; go straight from AMD.

    EDIT: Also try completely removing and reinstalling drivers.
  3. Hi thanks for the comments,

    When it loses signal i mean my monitor goes black and says no signal. HDMI output.
    So i disconnect GPU and power up on iGPU / VGA

    Im currently just having a cleanup of any old drivers and trying to get the GPU functioning again. Once running i will test what you have both suggested thanks :)
  4. 370370 said:
    Hi thanks for the comments,

    When it loses signal i mean my monitor goes black and says no signal. HDMI output.
    So i disconnect GPU and power up on iGPU / VGA

    Im currently just having a cleanup of any old drivers and trying to get the GPU functioning again. Once running i will test what you have both suggested thanks :)


    No problem, report back and we'll take the next steps :)
  5. Hi, right gone right through and got rid of all driver traces using Revo (v handy), rolled back to original driver only that came on CD with GPU. (not installed GPU Tweak etc). Since 1st posting i havnt managed to fire the GPU up at all! Looks like the mobo isnt even registering its existence!? Cant see it in device manager but then im not sure if i ever did TBH :P
  6. 370370 said:
    Hi, right gone right through and got rid of all driver traces using Revo (v handy), rolled back to original driver only that came on CD with GPU. (not installed GPU Tweak etc). Since 1st posting i havnt managed to fire the GPU up at all! Looks like the mobo isnt even registering its existence!? Cant see it in device manager but then im not sure if i ever did TBH :P


    Yea, I always use Revo for any uninstall, just make sure you only delete registry entries that are 100% related to the uninstall program.

    As for the main issue, try plugging the card into another pciex16 slot and see if you have any issues. Just to eliminate the slot being defective. Also just like another poster recommended, running Memtest86 to guarantee that it isn't a RAM related issue is definitely a good idea next.
  7. how exactly does the memtest work, i see i have to burn a bootable cd with it on?
  8. 370370 said:
    how exactly does the memtest work, i see i have to burn a bootable cd with it on?


    Yes, or you case use a flash drive.
  9. Right tried other PCIe slot, still nothing, power supply is fine, connection to board is solid.
    Ran Memtest, passed all tests with flying colours
    Set BIOS to PCIe primary graphics still nowt
    There is a BIOS update available (im on 1708, 1908 is out) but that shouldnt be neccersary should it?
  10. 370370 said:
    Right tried other PCIe slot, still nothing, power supply is fine, connection to board is solid.
    Ran Memtest, passed all tests with flying colours
    Set BIOS to PCIe primary graphics still nowt
    There is a BIOS update available (im on 1708, 1908 is out) but that shouldnt be neccersary should it?


    Probably not, but it might not hurt either. Has the card done this since purchase, or is the problem new?
  11. its done it intermittantly for the last 4 months (whole build is 7 months old), but now i cant get it to function at all lol!
    Also possibly a windows issue??
  12. Could be - can you view the BIOS over the card?
  13. Hi, sorry I don't know what you mean 'view bios over card'?
    Updated the bios last night, still no change.
    Still getting 'fail to load dlls. Please install VGA driver'
    Appreciate your help guys :) don't really wanna format and start all over :S
  14. I mean that if you try to enter the BIOS with the display connected to the 7950, does it show you anything? If it does, then the issue is with Windows. If not it's a hardware or BIOS problem.
  15. thanks for the clarification :) if the card is powered up when i boot i get no visual at all, so yes i see your train of thought, hardware/bios issue...

    is there any other option to fix at the mo?
    the card always ran sensible temps (sub 65 flat out)
  16. 370370 said:
    thanks for the clarification :) if the card is powered up when i boot i get no visual at all, so yes i see your train of thought, hardware/bios issue...

    is there any other option to fix at the mo?
    the card always ran sensible temps (sub 65 flat out)


    The only issue I could see would be a direct video card problem, or an issue with your motherboard. Do you possibly have an older gpu you could throw in there to test with the motherboard? If you can test another gpu you may find that your 7950 is the problem.
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