J'veu augmenté ma mém ram a 512mb

IL nous faut le modèle exact, mais bon au premier abord la mémoire maxi est de 512Mo soit 2 barrettes de 256Mo.
Vous n'avez que 2 sockets mémoires.

Allez sur ce site par exemple:
http://www.execute.be/kingstonconfig.asp
Choisissez la marque Hp.Compaq , puis desktop puis 866

Cette barrette là par exemple:
http://www.ec.kingston.com/ecom/config/partsinfo.asp?ktcpartno=KTH6501%2F256

vla kelk info :
System Information
------------------
Time of this report: 2/6/2009, 16:27:36
Machine name: CLIENT-1A38BA8A
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp.080413-2111)
Language: French (Regional Setting: French)
System Manufacturer: Compaq
System Model: Deskpro
BIOS: 686P2 v3.14
Processor: Intel Pentium III, ~860MHz
Memory: 190MB RAM
Page File: 435MB used, 46MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.5512 32bit Unicode
Display Devices
---------------
Card name: Intel(R) 82815 Graphics Controller (Microsoft Corporation)
Manufacturer: Intel Corporation
Chip type: Intel(R) 82815
DAC type: Internal
Device Key: Enum\PCI\VEN_8086&DEV_1132&SUBSYS_001A0E11&REV_02
Display Memory: 32.0 MB
Current Mode: 1024 x 768 (24 bit) (75Hz)
Monitor: Écran Plug-and-Play
Monitor Max Res: 1600,1200
Driver Name: i81xdnt5.dll
Driver Version: 6.13.0001.3198 (English)
DDI Version: 8
Driver Attributes: Final Retail
Driver Date/Size: 4/13/2008 20:33:28, 702845 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a
VDD: n/a
Mini VDD: i81xnt5.sys
Mini VDD Date: 4/13/2008 10:34:28, 161020 bytes
Device Identifier: {D7B78E66-5272-11CF-DF61-1B20A0C2CB35}
Vendor ID: 0x8086
Device ID: 0x1132
SubSys ID: 0x001A0E11
Revision ID: 0x0002
Revision ID: 0x0002
Video Accel: ModeMPEG2_A ModeMPEG2_B ModeMPEG2_C ModeMPEG2_D
Deinterlace Caps: n/a
Registry: OK
DDraw Status: Enabled
D3D Status: Enabled
AGP Status: Enabled
DDraw Test Result: Not run
D3D7 Test Result: Not run
D3D8 Test Result: Not run
D3D9 Test Result: Not run

-------------
Sound Devices
-------------
Description: Audio intégrée Intel(r)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: PCI\VEN_8086&DEV_2445&SUBSYS_000F0E11&REV_02
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: ac97intc.sys
Driver Version: 5.10.0000.3523 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 8/17/2001 21:20:04, 96256 bytes
Other Files:
Driver Provider: Microsoft
HW Accel Level: Full
Cap Flags: 0xB5B
Min/Max Sample Rate: 8000, 48000
Static/Strm HW Mix Bufs: 1, 0
Static/Strm HW 3D Bufs: 0, 0
HW Memory: 0
Voice Management: No
EAX(tm) 2.0 Listen/Src: No, No
I3DL2(tm) Listen/Src: No, No
Sensaura(tm) ZoomFX(tm): No
Registry: OK
Sound Test Result: Not run

---------------------
Sound Capture Devices
---------------------
Description: Audio intégrée Intel(r)
Default Sound Capture: Yes
Default Voice Capture: Yes
Driver Name: ac97intc.sys
Driver Version: 5.10.0000.3523 (English)
Driver Attributes: Final Retail
Date and Size: 8/17/2001 21:20:04, 96256 bytes
Cap Flags: 0x41
Format Flags: 0xCCC