hi i just got a quick question about my hp xw4400 desktop workstation pc. i was wondering how high my pc can support the video card between dd3 or dd5. i am currently using pny geforce gtx 750 ddr5 dual fan. and i'm trying to see if this can handle this video card in my hp using this video card ( Asus GeForce GTX 950 2GB 128-Bit GDDR5 Graphics Card.) thank you.