想買加ram

Machine name: WWW-A91EF702442
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.070227-2254)
Language: Chinese (Regional Setting: Chinese)
System Manufacturer: Tiny Computers
System Model: n/a
BIOS: Award Modular BIOS v6.0
Processor: Intel(R) Pentium(R) 4 CPU 2.40GHz
Memory: 256MB RAM
Page File: 320MB used, 323MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode


我應該買邊款?
幾$到??