[SOLVED] Amd gpu not working

[Mr_iny]

Hey guys
A few weeks ago a got a good deal on the dell optiplex 390
The specs were
I5 2400 3.1ghz
4gb ram ddr3
265w psu
320gb hdd
I bought a new thermaltake litepower 550w rgb
And i found a nice deal on SAPPHIRE Radeon HD 7870 XT for 50$
I hooked everything up and started the pc put there was no signal on the monitor then i plugged the vga cable in the motherboard and it worked but the amd was not detected what so ever on the pc the power cables were fine i tried the gpu on another pc and it worked fine and tried an old Nvidia 9800 gt and it worked fine the bios update is the latest i don't know what's the isuss
the Bois is on legacy could that be the issue why it's not booting ?
Tell me your thoughts

 

[Lutfij]

You might want to set the BIOS to UEFI(hybrid) and see if your experience varies. Mind sharing a link to the GPU you've purchased?

 

[sizzling]

Dell have been known to add BIOS restrictions so only certain gpu models are supported. Could be you have run into this.

 

[Mr_iny]

You might want to set the BIOS to UEFI(hybrid) and see if your experience varies. Mind sharing a link to the GPU you've purchased?

https://www.techradar.com/reviews/p...rds/sapphire-radeon-hd-7870-xt-1130535/review

 

[lynx1021]

Does yours have the 2-6 pin extra power connector on it? If so have you hooked them up? Also says 500watt PSU required
(TDP is 185 watts) Saw where some have been able to run a 1050Ti on the 390.

 

[lynx1021]

Found this on GPU BOSS "Some have a switch on them,
that's the BIOS switch. Side 1 is the regular BIOS that you can flash and upgrade it. side 2 is the factory version of the BIOS and can not be flashed.
You would use this switch in case you tried to flash side 1 and something went wrong and you bricked the bios. You can power down, switch to side 2 and boot up on the factory version of the BIOS. Once you have booted up, while running you can flip back to #1 and re-flash it and fix it."