The cooling fan on my video card is going fast. I currently have a ECS NGT520C-1GQK-F GeForce GT 520 (Fermi) 1GB 64-Bit DDR3 PCI Express 2.0 x16 HDCP Ready Low Profile Ready Video Card. It's served me well. What things should I look for in the new card? I use the computer a lot for poser and also luxrenderer.

Also what damage am I doing to the rest of my computer if I keep using this one as is, until I get a new one?

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I use Poser 13 and win 10