Probleme de son win xp

Bonjour, j'ai récemment "monter" un pc moi même mais après l'installation de Windows et des pilotes je me suis rendu compte que je n'avais pas de son,j'ai passer énormément de temps a rechercher le bon pilote audio mais sans résultat,sil vous plait aidez moi .

voici les infos de mon pc selon Everest Ultimate :


Field Value
Computer
Computer Type PC multiprocesseur ACPI
Operating System Microsoft Windows XP Home Edition
OS Service Pack [ TRIAL VERSION ]
Internet Explorer 6.0.2900.5512
DirectX 4.09.00.0904 (DirectX 9.0c)
Computer Name ALKA
User Name ALKATASTROPHE
Logon Domain [ TRIAL VERSION ]
Date / Time 2012-05-29 / 11:19

Motherboard
CPU Type Intel Xeon, 3200 MHz (16 x 200)
Motherboard Name Hewlett-Packard hp workstation xw6200
Motherboard Chipset Intel Tumwater E7525
System Memory [ TRIAL VERSION ]
DIMM1: Infineon 72T128000HR5A 1 GB DDR2-400 Reg. ECC DDR2 SDRAM (5-3-3-8 @ 200 MHz) (4-3-3-8 @ 200 MHz) (3-3-3-8 @ 200 MHz)
DIMM2: Infineon 72T128000HR5A [ TRIAL VERSION ]
DIMM3: Infineon 72T128000HR5A [ TRIAL VERSION ]
DIMM4: Samsung M3 93T2950CZP-CCC [ TRIAL VERSION ]
BIOS Type Compaq (12/22/05)
Communication Port Port de communication (COM1)
Communication Port Port imprimante ECP (LPT1)

Display
Video Adapter Matrox MP-PCIe-9064 (128 MB)
Video Adapter Matrox MP-PCIe-9064 (128 MB)
3D Accelerator Matrox P690
Monitor NEC MultiSync LCD1960NXi (Analog) [19" LCD] (46017862YB)

Multimedia
Audio Adapter Analog Devices AD1981B(L) @ Intel 82801EB ICH5 - AC'97 Audio Controller [A-2/A-3]

Storage
IDE Controller Intel(R) 82801EB Ultra ATA Storage Controllers
IDE Controller Intel(R) 82801EB Ultra ATA Storage Controllers
Floppy Drive Lecteur de disquettes
Disk Drive WDC WD800JD-75MSA1 (74 GB, IDE)
Optical Drive HL-DT-ST DVD-ROM GDR8164B (16x/52x DVD-ROM)
SMART Hard Disks Status OK

Partitions
C: (NTFS) [ TRIAL VERSION ]
Total Size [ TRIAL VERSION ]

Input
Keyboard Clavier standard 101/102 touches ou clavier Microsoft Natural Keyboard PS/2
Mouse Souris compatible PS/2
Mouse Souris HID

Network
Primary IP Address [ TRIAL VERSION ]
Primary MAC Address 00-17-08-2A-B9-A1
Network Adapter Broadcom NetXtreme Gigabit Ethernet (192. [ TRIAL VERSION ])

Peripherals
USB1 Controller Intel 82801EB ICH5 - USB Controller [A-2/A-3]
USB1 Controller Intel 82801EB ICH5 - USB Controller [A-2/A-3]
USB1 Controller Intel 82801EB ICH5 - USB Controller [A-2/A-3]
USB1 Controller Intel 82801EB ICH5 - USB Controller [A-2/A-3]
USB2 Controller Intel 82801EB ICH5 - Enhanced USB2 Controller [A-2/A-3]
USB Device Périphérique d'interface utilisateur USB

DMI
DMI BIOS Vendor Hewlett-Packard
DMI BIOS Version 786B7 v2.08
DMI System Manufacturer Hewlett-Packard
DMI System Product hp workstation xw6200
DMI System Version
DMI System Serial Number [ TRIAL VERSION ]
DMI System UUID [ TRIAL VERSION ]
DMI Motherboard Manufacturer Hewlett-Packard
DMI Motherboard Product 08B8h
DMI Motherboard Version
DMI Motherboard Serial Number [ TRIAL VERSION ]
DMI Chassis Manufacturer Hewlett-Packard
DMI Chassis Version HP Minitower
DMI Chassis Serial Number [ TRIAL VERSION ]
DMI Chassis Asset Tag [ TRIAL VERSION ]
DMI Chassis Type Mini Tower


Merci a vous.