GPU works, but doesn't work

reiyne

Prominent
Jul 17, 2017
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510
Hey guys, joined just to try and find help. Had a look but couldn't find answers that work.
Firstly
Op System: Windows 10
Processor: Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz
Card: AMD Radeon HD 7800 Series
MoBo: Intel H77
PSU: 460W
Ram: 16gb

The other day I was sat at my desktop when both monitors went black. I figured the card had died on me and swapped it out for an older 7770 I had lying around and everything worked fine. I took the dead card to my sisters and tried it in her older computer, and it worked fine.

When it is installed in my pc, the fans kick in and I can hear the HDD boot up as normal.

I've tried; reseating it multiple times, uninstalling all drivers, and power supply connections. I can't think what else I could do as the 7770 is unaffected.

Any help is help.
Thanks.
 

maxalge

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HD 7800 Series


please specify which card this is


open the case and look at it if you dont know, they have stickers on them with the model number etc



PSU: 460W


this as well, same as above
 

reiyne

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Jul 17, 2017
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510
Sorry, HD7870, the PSU is just dells stock PSU, model: HU460AD-01
I should have been more specific there

The card is the same that was shipped with the PC, so power SHOULDN'T be an issue imo..But hey, I'm the one stumped.
 

maxalge

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that is a bit underpowered for a 7870

500w or better with at least 30 amps on the 12v rail is recommended


does that psu even have two 6-pin cables?

 

reiyne

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Jul 17, 2017
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510


Even though it has been running fine since I got it over 2 years ago?

 

maxalge

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power supplies decline/degrade as time goes by
 

reiyne

Prominent
Jul 17, 2017
4
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510


Hmm, I'll take it under consideration. I was thinking about upgrading it at some point anyway. Thanks