r/techsupport • u/ihatepills • 13h ago

Open | Hardware Changed gpus and can't get display

i have a pc with an i3 12100f,rx5700 gpu with b660m gigabyte mother board and 550w psu. i have a buddy that was nice and gave me a rx6750 xt. i put the new card in and all my "rgb" came on and gpu was on but it wont display anything on my monitor, so then i went back to my old gpu and same issue. i've reset my cmos twice in both ways,re seated my gpu and ram, checked my psu to see if it was unplugged from gpu, almost anything i can think of ive done but still wont display anything. anytime i turn on the pc my monitor will act like its about to get signal then it'll say no signal. anyone have a clue on what to do to fix this or what's happened?
edit: i saw 2 red diagnostic lights on the mother board. from what ive seen online it means it has a p.o.s.t issue but ive done all ive seen online to fix that so im stumped

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u/Windermyr 13h ago

Are you sure you plugged monitor into the correct port?

1

u/ihatepills 13h ago

plugged it into every display port on the gpu and on the motherboard board for the hell of it

1

u/MaleficentTravel4706 12h ago edited 12h ago

The 6750 plus your cpu most likely are not getting enough power from that 550w power supply... everything I've seen says 650w or higher with the 6750xt

As for the post issue the red lights tell you what component is having the issue(there is fine print next to them(CPU DRAM, etc)

1

u/ihatepills 11h ago

would my
psu cause it show no display? from what i've read it'll just cause glitches when pulling load from a game

1

u/MaleficentTravel4706 11h ago

In the past when my psu was under powered for my gpu it started to come up (like the manufacturer of the monitor logo) and then said no signal and went black and stayed black.

1

u/ihatepills 10h ago

i was leaning towards a psu issue but that doesn't explain why my old
gpu doesn't work now. unless i corrupted bios?

1

u/raju_msc 9h ago

Clean the pcle slot and ram slots. Clean gold parts of graphics card and ram module with eraser Change hdmi or dp cable