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Help! ASRock Z77 Extreme 4 not detecting GPU.

post #1 of 17
Thread Starter 
Ok I'm starting this so i don't hijack or go off topic on other threads.

The problem is as follows;

Been messing around with my Sapphire HD 7850. I was running Furmark and system froze, all fans came on 100% and I got a blank screen. I had to hold the power button down to get it to restart and now the system doesn't detect the graphics card. Using integrated graphics at the minute.

The last settings I had it at, I believe, were core 1160mhz and 1.165v. I think memory was stock. Again it's a Sapphire HD 7850 (non-OC one). Max temps were about 72°C, fans on auto hitting just under 50%.

I've restarted the PC a few times, reseated the gpu, tried it in the other PCIe slot, took it out it back in the first one. Looked in BIOS for PCIe graphics etc. Device manager doesn't see it at all, not even a yellow triangle for an unknown device.



Update.

So I brought the GPU into a local PC hardware shop and they kindly stuck it into one of their machines and it was detected. They didn't have CCC drivers but it was detected none the less and they were getting a video signal from it.

I tried it again in mine since incase plugging it into their mobo "reset" it to default (from the OC'd voltage) but still nothing. Also deleted MSI Afterburner and ASUS GPU Tweak just in case the problem was the OC and they were loading it at the higher setting. Completely removed all ATI/AMD drivers and folders (even in registry) but that didn't help either.

Looks like it's my mobo (ASRock Z77 Extreme 4 BIOS v1.40)? I don't have another card to test in it though.

Any ideas? headscratch.gif

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post #2 of 17
Are you sure you didn't fry your PCI-e slots somehow? Also does your GPU sag in your case? Mine will refuse to give video if it bends too much. If all else fails then backup everything and reinstall Windows.
     
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post #3 of 17
Thread Starter 
Quote:
Originally Posted by bigkahuna360 View Post

Are you sure you didn't fry your PCI-e slots somehow? Also does your GPU sag in your case? Mine will refuse to give video if it bends too much. If all else fails then backup everything and reinstall Windows.

I'm not sure at all frown.gif Although I only had the GPU voltage up to 1.165v and 1.25 - 1.3 seems to be doable for big OCs. The card doesn't sag at all. Trying CMOS reset now as someone recommended it.
post #4 of 17
many people including me have had this problem, i finally got it working in the second slot somehow but that doesnt seem to work with you. updating bios sometimes fixes the problem aswell, you can try to flash it to 1.70.. if that doesnt work i would contact asrock support if i were you, maybe they have some magic fix tongue.gif
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post #5 of 17
Quote:
Originally Posted by punceh View Post

many people including me have had this problem, i finally got it working in the second slot somehow but that doesnt seem to work with you. updating bios sometimes fixes the problem aswell, you can try to flash it to 1.70.. if that doesnt work i would contact asrock support if i were you, maybe they have some magic fix tongue.gif

This^
Try a reinstall and if that doesn't work then send it in to them. They'd probably ask you to do a reinstall anyway.
     
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Intel i7 8700k Nvidia GTX 1070 16GB's Kingston Hyper X DDR4 2400 Samsung PM951 500GB m.2 SSD 
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post #6 of 17
Thread Starter 
Sucess, CMOS reset done the trick! Now to start from square 1 again!
post #7 of 17
Congrats on fixing the problem. applaud.gif I didn't thin a CMOS reset would work. :/
     
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Intel i7 8700k Nvidia GTX 1070 16GB's Kingston Hyper X DDR4 2400 Samsung PM951 500GB m.2 SSD 
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post #8 of 17
Thread Starter 
Me neither and was reluctant to do so as I would lose my OC but it both worked and my OC was still saved to as a user setting! win win! Thanks for all the suggestions guys!
post #9 of 17
Was just tring to help out. smile.gif
     
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Intel i7 8700k Nvidia GTX 1070 16GB's Kingston Hyper X DDR4 2400 Samsung PM951 500GB m.2 SSD 
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post #10 of 17
congrats Brian!
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