try to choose a graphics card

System Manufacturer/Model Number: home Made
OS: Windows 7 RTM x64
CPU: AMD Phenom II X3 720 2.8GHz (not overclocked yet)
Motherboard: ASUS M4A785TD-V EVO AM3
Memory: G.SKILL 4GB (2 x 2GB) DDR3 1333
Graphics Card: XFX Radeon HD 4870 1GB 256-bit GDDR5
Sound Card: On Board 7.1
Monitor(s) Displays: 1
Screen Resolution: 1920x1080
Keyboard: Microsoft Sidewinder x6
Mouse: ikari laser gaming mouse
PSU: COOLER MASTER RS-600-AMBA-D3 600W modular
Case: Cooler Master Storm Scout
Cooling: Stock heatsink for now
Hard Drives: SeaGate 120GB and a 80 GB as back up
Internet Speed: 1.5 MB/s