Dell Optiplex 990

My specs: Dell Optiplex 990 8gb ddr3 ram i5-2500 windows 10 500w psu I bought a MSI GTX 1050ti off of ebay and when I plugged it in and started it, I got a few beeps and nothing else. The fans and the leds on the card itself come on so it is definitely getting power from the 6-pin but no matter...

i have an old dell optiplex 990 with core i5 2500(3.3ghz), 4 gigs ram(1333mhz). 06D7TR motherboard and psu 265w,, please suggest a decent gpu with sufficient vram, which components need to upgrade to avoid bottle neck , i have a budget of 150$ to 180$. thanks in advance.

Hello there I've just bought a dell optiplex 990 i7, 8gb ram, 1tb storage and I have a gtx 1050ti I was wondering what power supply I need to buy to run the 1050 and the rest of the pc.