Ajout RAM pour accélérer vieux PC

Bonjour,

je souhaite augmenter la vitesse de mon vieu PC. voila la configuration de la carte mere :

Manufacturer MSI
Model MS-7260
Version 1.0
Serial Number [unknown]
Bridge
North Bridge NVIDIA nForce 550 Revision A1
South Bridge NVIDIA nForce 550 Revision A2
CPU
Name AMD Athlon(tm) 64 Processor 3500+
Cpu Socket Socket AM2 (940)
Max CPU Speed 2200 MHz
Memory
Maximum Capacity 8192 MBytes
Maximum Memory Module Size 1024 MBytes
Memory Slots 4
Memory Type DDR2
System Slots
ISA 0
PCI 1
AGP 1
VL-BUS 0
EISA 0
PCMCIA 0
ExpressCard 0
MCA 0

et de la RAM :

Property Value
YAEL (MSI MS-7260)
Memory Summary Reported by BIOS
Maximum Capacity 8192 MBytes
Maximum Memory Module Size 1024 MBytes
Memory Slots 4
Error Correction None
DRAM Frequency 315.9 MHz
Memory Timings 5-5-5-15 (CL-RCD-RP-RAS)
Device Locator Slot 1
Capacity 512 MBytes
Memory Type DDR2 (PC2-5300)
Speed 333 MHz (DDR2 667)
Supported Frequencies 200.0 MHz, 266.7 MHz, 333.3 MHz
Memory Timings 3-3-3-9-12 at 200.0 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Memory Timings 4-4-4-12-16 at 266.7 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Memory Timings 5-5-5-15-20 at 333.3 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Data Width 64 bits
EPP SPD Support No
XMP SPD Support No
Device Locator Slot 2
Capacity 512 MBytes
Memory Type DDR2 (PC2-5300)
Speed 333 MHz (DDR2 667)
Supported Frequencies 200.0 MHz, 266.7 MHz, 333.3 MHz
Memory Timings 3-3-3-9-12 at 200.0 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Memory Timings 4-4-4-12-16 at 266.7 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Memory Timings 5-5-5-15-20 at 333.3 MHz, at 1.8 volts (CL-RCD-RP-RAS-RC)
Data Width 64 bits
EPP SPD Support No
XMP SPD Support No

Du coup j'ai cherché des barrettes PC2-5300 DDR2 de 512Mo et 333.3Mhz et je n'en ai pas trouvé.

QUe me conseillez vous?

Si cela ne sert à rien de rajouter de la Ram et qu'il vaut mieux racheter un PC hésitez pas à me le dire.

Merci.