read the label in the pics for info...it clearly states ( NV 8400GS 256MB 64BIT DDR2 TV DVI PCI-EX) Wish I had a 64BIT system that I could use this in......
it doesn't matter which operating system you are using 32 nor 64 bit..... what matters is... do you have the correct port on your motherboard? This cars is PCI Express and *BTW* the specs of the video card are = Core 450 MHz - Shader 900 MHz Memory Clock 400 MHz - Memory Amount 256 MB - Memory Interface 64 bit - Memory Bandwith (GB/Sec) 6.4 - Texture Fill Rate (Billion/sec) 3.6....... in case you didn't want to or know where to look them up!