Hello Eveybody. I am Deepak. I have a optiplex 745 desktop with 2gb ram, 280watt power supply, 500 HDD and Genuine Intel(R) CPU 2160@ 1.80 GHz. Bios Version 2.6.6. I want to install windows 8 64 bit. Whenever i install it, the graphics performance will be too slow. what kind of Graphics card should i use to enhance the graphics performance and play with higher gaming performance. Please suggest me.