請問 我這樣的配備 我想升級顯卡 跟記憶體.....

目前記憶體 是 4G 一條
然後 目前顯卡是GTS450 我想換更高階的顯卡 我想知道 這主板 能支援顯卡到什麼等級
資料如下:
Machine name: USER-PC
Operating System: Windows 7 旗艦版 64-bit (6.1, Build 7600) (7600.win7_rtm.090713-1255)
Language: Chinese (Traditional) (Regional Setting: Chinese (Traditional))
System Manufacturer: MSI
System Model: MS-7597
BIOS: Default System BIOS
Processor: AMD Athlon(tm) II X4 640 Processor (4 CPUs), ~3.0GHz
Memory: 4096MB RAM
Available OS Memory: 4096MB RAM
Page File: 2072MB used, 6115MB available
Windows Dir: C:Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode