Which graphics card is best for my PC


Which Graphics card of 2 GB CAN BE SUPPORTED BY SYSTEM. SYSTEM DETAILS AS-:

OS Name -- Microsoft Windows 7 Ultimate
Version -- 6.1.7600 Build 7600
System Manufacturer--- BIOSTAR Group
System Model A55ML2
System Type x64-based PC
Processor AMD A4-4000 APU with Radeon(tm) HD Graphics, 3000 Mhz, 2 Core(s), 2 Logical Processor(s)

BIOS Version/Date American Megatrends Inc. 4.6.5, 4/18/2013
SMBIOS Version 2.7
Hardware Abstraction Layer Version = "6.1.7600.16385"
Installed Physical Memory (RAM) 6.00 GB
Total Physical Memory 5.21 GB
Available Physical Memory 2.68 GB
Total Virtual Memory 10.4 GB
Available Virtual Memory 7.12 GB
Page File Space 5.21 GB