4 Go de ram 300 W

Salut tout le monde J'ai 2 Go avec 2*1Go 800Mgz et je voudrais changer les 2 barrette par 2*2GO 800 Mhz Car j'ai que 2 port et ma config :
Processors Information
-------------------------------------------------------------------------

Processor 1 ID = 0
Number of cores 2 (max 2)
Number of threads 2 (max 2)
Name Intel Pentium E2200
Codename Conroe
Specification Intel(R) Pentium(R) Dual CPU E2200 @ 2.20GHz
Package (platform ID) Socket 775 LGA (0x0)
CPUID 6.F.D
Extended CPUID 6.F
Core Stepping M0
Technology 65 nm
Core Speed 1197.0 MHz
Multiplier x FSB 6.0 x 199.5 MHz
Rated Bus speed 798.0 MHz
Stock frequency 2200 MHz
Instructions sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T
L1 Data cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L1 Instruction cache 2 x 32 KBytes, 8-way set associative, 64-byte line size
L2 cache 1024 KBytes, 4-way set associative, 64-byte line size
FID/VID Control yes
FID range 6.0x - 11.0x
Max VID 1.350 V

Carte graphique : Nvidia Geforce 9500 Gt 1 Go DDr2
Alimontation : Lite-on 300W
Esque la 300 w ne sera pas saturé ..
Et merci d'avance !!!