Memória

Tenho dois pentes de memória de 128 Mb instalados e quero aumentar para 1Gb.
Gostaria de ajuda para poder comprar o pente de memória certo.
Não sei se as informações abaixo ajudam mas.....


CPU-Z 1.44.1 report file
Processor(s)
Number of processors 1
Number of cores 1 per processor
Number of threads 1 per processor
Name Intel Celeron 325
Code Name Prescott
Specification Intel(R) Celeron(R) CPU 2.53GHz
Package Socket 478 mPGA
Family/Model/Stepping F.4.1
Extended Family/Model F.4
Core Stepping E0
Technology 90 nm
Core Speed 2534.0 MHz
Multiplier x Bus speed 19.0 x 133.4 MHz
Rated Bus speed 533.5 MHz
Stock frequency 2533 MHz
Instruction sets MMX, SSE, SSE2, SSE3
L1 Data cache (per processor) 16 KBytes, 8-way set associative, 64-byte line size
Trace cache (per processor) 12 Kuops, 8-way set associative
L2 cache (per processor) 256 KBytes, 4-way set associative, 64-byte line size
Chipset & Memory
Northbridge VIA P4M266 (VT8751) rev. 00
Southbridge VIA VT8237 rev. 00
Graphic Interface AGP
AGP Revision 2.0
AGP Transfer Rate 4x
AGP Side Band Addressing not supported, not enabled
Memory Type DDR
Memory Size 256 MBytes
Memory Frequency 133.4 MHz (1:1)
DRAM Interleave 4-way
CAS# Latency (tCL) 2.0 clocks
RAS# to CAS# (tRCD) 3 clocks
RAS# Precharge (tRP) 3 clocks
Cycle Time (tRAS) 6 clocks
System
System Manufacturer Itautec Philco S.A.
System Name Infoway
System S/N C034C01500012
Mainboard Vendor Itautec Philco S.A.
Mainboard Model ST 1430
BIOS Vendor Itautec ST 1430, LTD
BIOS Version 6.00 PG
BIOS Date 10/05/2004
Memory SPD
Module 1 DDR, PC3200 (200 MHz), 128 MBytes, unknown brand
Module 2 DDR, PC3200 (200 MHz), 128 MBytes, unknown brand
Software
Windows Version Microsoft Windows XP Professional Service Pack 2 (Build 2600)
DirectX Version 9.0c