I have a RTX 3050 8GB working in my Optiplex 9020 MT. The motherboard is PCIe 3.0 and the card is 4.0 but that's no problem. I used a coolermaster 850 watt PSU with 24 to 8 pin adapter. The PSU is a bit of an overkill and barely fitted (I can't close the case properly now). I also tried a RTX...
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