Quelle ram choisir ?

Bonjour,
Histoire de redonner un peu de "peps" a un laptop, je souhaite acheter 3go de ram. Mais même après lecture de la page CCM, je n'arrive pas choisir le bon modele. Pourriez vous m'aider ?
Voici le rapport CPU-Z :

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Processor 1 ID = 0
Number of cores 1 (max 1)
Number of threads 1 (max 1)
Name Mobile AMD Sempron 3500+
Codename Keene
Specification Mobile AMD Sempron(tm) Processor 3500+
Package Socket S1 (638)
CPUID F.C.2
Extended CPUID F.4C
Brand ID 3
Core Stepping DH-F2
Technology 90 nm
Core Speed 1795.7 MHz
Multiplier x FSB 9.0 x 199.5 MHz
HT Link speed 798.1 MHz
Stock frequency 1800 MHz
Instructions sets MMX (+), 3DNow! (+), SSE, SSE2, SSE3, x86-64
L1 Data cache 64 KBytes, 2-way set associative, 64-byte line size
L1 Instruction cache 64 KBytes, 2-way set associative, 64-byte line size
L2 cache 512 KBytes, 16-way set associative, 64-byte line size
FID/VID Control yes
Max FID 9.0x
Max VID 1.250 V
P-State FID 0x0 - VID 0x18 (4.00x - 0.950 V)
P-State FID 0x8 - VID 0x10 (8.00x - 1.150 V)
P-State FID 0xA - VID 0x0E (9.00x - 1.200 V)

K8 Thermal sensor yes
K8 Revision ID 5.2
Attached device PCI device at bus 0, device 24, function 0
Attached device PCI device at bus 0, device 24, function 1
Attached device PCI device at bus 0, device 24, function 2
Attached device PCI device at bus 0, device 24, function 3

Memory SPD
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DIMM # 1
SMBus address 0x50
Memory type DDR2
Module format SO-DIMM
Manufacturer (ID) MOSEL (4000000000000000)
Size 512 MBytes
Max bandwidth PC2-5300 (333 MHz)
Part number V916764B24QBFW-F5
Serial number 09A32E00
Manufacturing date Week 34/Year 07
Number of banks 2
Data width 64 bits
Correction None
Nominal Voltage 1.80 Volts
EPP no
XMP no
JEDEC timings table CL-tRCD-tRP-tRAS-tRC @ frequency
JEDEC #1 3.0-3-3-9-12 @ 200 MHz
JEDEC #2 4.0-4-4-12-16 @ 266 MHz
JEDEC #3 5.0-5-5-15-20 @ 333 MHz

DIMM # 1
SPD registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 80 08 08 0D 0A 61 40 00 05 30 45 00 82 10 00 00
10 0C 04 38 01 04 00 07 3D 50 50 60 3C 28 3C 2D 40
20 20 27 05 17 3C 1E 1E 00 00 3C 69 80 18 22 00 59
30 7C 9B 41 3F 33 52 39 82 2A 50 00 00 00 00 12 E8
40 40 00 00 00 00 00 00 00 02 56 39 31 36 37 36 34
50 42 32 34 51 42 46 57 2D 46 35 00 00 00 07 34 09
60 A3 2E 00 50 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80 44 45 4C 58 50 53 2D 30 35 31 00 00 00 00 00 00
90 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
A0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
B0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
C0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
D0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
E0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
F0 AA 00 00 00 00 00 00 00 04 41 00 00 00 00 00 00

Monitoring
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Mainboard Model 30C2 (0x000000D8 - 0x000022B0)

LPCIO
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LPCIO Vendor SMSC
LPCIO Vendor ID 0x55
LPCIO Chip ID 0x36
Config Mode I/O address 0x2E
Config Mode LDN 0x9
Config Mode registers
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00 00 00 00 00 00 00 00 09 00 00 00 00 00 00 00 00
10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
20 36 00 00 00 84 04 2E 00 00 00 00 00 00 00 00 00
30 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Register space LPC, base address = 0x0500

DMI
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DMI BIOS
vendor Hewlett-Packard
version 68YTT Ver. F.07
date 07/16/2007

DMI System Information
manufacturer Hewlett-Packard
product HP Compaq 6715b (GU475EC#ABF)
version F.07
serial CNU74123HS
UUID {F906F815-15D1-11E0-4384-6D990E48E529}

DMI Baseboard
vendor Hewlett-Packard
model 30C2
revision KBC Version 71.28
serial unknown

DMI System Enclosure
manufacturer Hewlett-Packard
chassis type Notebook
chassis serial CNU74123HS

DMI Processor
manufacturer AMD(R)
model Mobile AMD Sempron(tm) 3500+
clock speed 1800.0 MHz
FSB speed 200.0 MHz
multiplier 9.0x

DMI Extension Slot
designation PC CARD-Slot 0
type PCMCIA
width 32 bits
populated no

DMI OEM Strings
string[0] www.hp.com
string[1] ABS 70/71 79 7A 7B 7C

DMI Physical Memory Array
location Motherboard
usage System Memory
correction None
max capacity 4096 MBytes
max# of devices 2

DMI Memory Device
designation DIMM #1
format SODIMM
type unknown
total width 64 bits
data width 64 bits
size 512 MBytes

DMI Memory Device
designation DIMM #2
format SODIMM
type unknown

Software
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Windows Version Microsoft Windows Vista (6.0) Home Basic Edition Service Pack 2 (Build 6002)
DirectX Version 11.0

Merci d'avance.
Cordialement.