Is Nividia 210 Supported On Dell Optiplex 755 Destop

What is the cheapest GPU (video card) that I can put into my Dell Optiplex 755?

You have a very borderline system with 2.66 GHz dual-core and 667 MHz DDR2. You could waste $34 to $39 on a very low performance 1GB GeForce 8400 GS, GeForce 210, or GT 710.The GT710 as the fittest of this bunch can be found in a 2GB DDR3 version ($46) with 192 CUDA cores running at 954 MHz with a memory bandwidth of 14.4 GB/sec.For a dollar more at $47, you can get a factory refurbished MSI GT 730 with 384 CUDA cores running at 902 MHz with the same 64-bit bus and the same memory bandwidth of 14.4 GB/sec, but double the GPU power.The GT 730 that I own is the PNY Verto which is around $68 and comes with 1GB GDDR5 and benchmarks a memory bandwidth of 40 GB/sec. On a Dell Vostro 230 with 2.93 GHz dual-core and 4 GB DDR3–1033 I can play many great older games (like NFS: Most Wanted) very nicely at 1080p.Wattage rating on these is negligible.31W for the GDDR5 Verto
26W for the 2BG DDR3 GT730
19W for the 2GB DDR3 GT710
…and so should be fine in a small form factor PC like the Optiplex 755 or any PC with a 250W PSU or higher (300W is recommended, but the actual operating wattage of any typical desktop PC is realistically 75W to 150W)Also, be sure you have at least 4GB of system RAM.For your system running a DDR3 GT730, you should have pretty good luck gaming at 1366x768, or 1280x1024 on a 4:3 monitor.