Having trouble installing my Gigabyte r9 390 GPU

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nathan.w.gehman

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Jan 1, 2018
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I recently bought a r9 390 card from my friend. When I installed it, there was nothing showing up on my monitor. I believe it was getting signal, as it was not saying "No Signal", but don't know this for sure. I have uninstalled previous drivers from my old card, which was a r7 260x. After hours of troubleshooting, I decided to go back to my 260x.

Specs:
500w PSU (don't know the manufacturer)
Everything else is unchanged from the build here (Yes I know, it is old and crappy and it needs to be changed) https://support.hp.com/us-en/document/c02839589
 
Solution
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I was given an R9 390x from a friend and had trouble getting it to post/show output. I upped my power from 500 to 850 and the issue did not change. I then flashed the bios on my motherboard to the most current stable version. After this the card worked fine, I have not tried going back to the 500watt supply - as previously stated the card wants power.

My CPU/motherboard were first gen 2011 chipset, I was also running the first version of bios on my MB. It was the first time that I flashed bios and I was scared to do it, if you go this path it is not difficult. I was sure to get the bios from my MB manufacturer and I went with the most recent non-beta version.
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Mark RM

Mark RM

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Jul 16, 2014
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That unit ships with a UEFI BIOS. But it states the PSU is only 300 watts. I know you said you had a random 500 W PSU, but a R9 390 is a true power sucking beast (great card though) ...

Still it should at least start. If you leave the monitor attached to the mobo, do you get into windows with the card? Is it detected in device manager?
 
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nathan.w.gehman

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Jan 1, 2018
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I currently can't connect directly to the motherboard because I don't have a DVI or VGA cable, and the motherboard doesn't have HDMI. I will get one soon, and see what happens.
 
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nathan.w.gehman

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Jan 1, 2018
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Ok so I did a bit more research, and found out something. When I first read the UEFI BIOS thing, it went straight over my head but recently I did a bit more research, and found that I actually have Legacy BIOS from the msinfo32 thing. I still don't know much about BIOS, but is it possible that both are on my computer and I need to switch it somehow? Do I need to upgrade to UEFI?
 
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robin.pierce.84

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Jan 4, 2018
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I was given an R9 390x from a friend and had trouble getting it to post/show output. I upped my power from 500 to 850 and the issue did not change. I then flashed the bios on my motherboard to the most current stable version. After this the card worked fine, I have not tried going back to the 500watt supply - as previously stated the card wants power.

My CPU/motherboard were first gen 2011 chipset, I was also running the first version of bios on my MB. It was the first time that I flashed bios and I was scared to do it, if you go this path it is not difficult. I was sure to get the bios from my MB manufacturer and I went with the most recent non-beta version.
 
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Solution
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nathan.w.gehman

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Jan 1, 2018
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When you flashed your BIOS, was it an upgrade to UEFI? Also, how do I find the software needed to flash BIOS?

 
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