Probleme jeux video

Bonjour,
j'ai un probleme, j'installe un jeu video ya pas de souci je lance le jeu, et quand je suis dessu sa bug, genre y reste blocé 5sec toutes les 10sec..., sur WoW, CSS et America's army 3, pourtant pour css et wow j'ai la config minimum recommander. ma config ==> Version du plugin
3.5.1 build 0
Version de la base
10
Date de la détection
21/07/2009 11:16
Nom de la machine

Système d'exploitation
Windows XP Professionnel (build 2600) Service Pack 3
Navigateur web par défaut:
Client e-mail par défaut:
Client de groupes de discussions par défaut: Outlook Express
Antivirus: Avira AntiVir PersonalEdition 8.0.1.30
Carte mère
SMBios version 2.5
MICRO-STAR INTERANTIONAL CO.,LTD MS-7367 1.0
Bios: American Megatrends Inc. V3.4 03/28/2008 taille: 1024Kb
Chipset
Northbridge: ATI RS690/RS690M
Southbridge: ATI SB600
Processeur
AMD Sempron LE-1200 Sparta Socket AM2 (940) (@65 nm) 2100 Mhz ( L1I: 64 Ko, L1D: 64 Ko, L2: 512 Ko )
Mémoire
Mémoire physique totale: 2048 Mo, Type: DDR2, @261.9MHz, 4.0-4-4-12-2T
DDR2 Transcend Information JM667QLJ-1G 1024 Mo PC2-5300 (333 Mhz) (5.0-5-5-15)
DDR2 MOSEL V916764K24QAFW-E4 512 Mo PC2-4300 (266 Mhz) (4.0-4-4-11)
DDR2 MOSEL V916764K24QAFW-E4 512 Mo PC2-4300 (266 Mhz) (4.0-4-4-11)
Carte Graphique
ATI Technologies Inc RS690 [Radeon X1200 Series] K9AG Neo2 (700 Mo)
Péripheriques IDE
MAXTOR STM3160215AS 4.AAB (SATA, 149.05 Go, tampon: 2 Mo)
Lecteurs CD/DVD
TSSTcorpCDDVDW SH-S203D SB00 (DVD-R/DL sequential recording Recorder)
Disque dur
MAXTOR STM3160215AS (149.05Go)
USB DISK 2.0 USB Device (1.83Go)
EPSON Stylus Storage USB Device
Cartes PCI/AGP
Stockage
ATI Technologies Inc:SB600 Non-Raid-5 SATA: K9AG Neo2
ATI Technologies Inc:SB600 IDE

Réseau
Realtek Semiconductor Co., Ltd.:RTL8111/8168B PCI Express Gigabit Ethernet controller

Affichage
ATI Technologies Inc:RS690 [Radeon X1200 Series]: K9AG Neo2

Multimedia
ATI Technologies Inc:SBx00 Azalia (Intel HDA)

Ponts
ATI Technologies Inc:RS690 Host Bridge
ATI Technologies Inc:RS690 PCI to PCI Bridge (Internal gfx): RS690 PCI to PCI Bridge (Internal gfx)
ATI Technologies Inc:RS690 PCI to PCI Bridge (PCI Express Port 3): RS690 PCI to PCI Bridge (PCI Express Port 3)
ATI Technologies Inc:SB600 PCI to LPC Bridge
ATI Technologies Inc:SBx00 PCI to PCI Bridge: SBx00 PCI to PCI Bridge
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] HyperTransport Technology Configuration: K8 [Athlon64/Opteron] HyperTransport Technology Configuration
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] Address Map: K8 [Athlon64/Opteron] Address Map
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] DRAM Controller: K8 [Athlon64/Opteron] DRAM Controller
Advanced Micro Devices [AMD]:K8 [Athlon64/Opteron] Miscellaneous Control: K8 [Athlon64/Opteron] Miscellaneous Control

Bus Series
ATI Technologies Inc:SB600 USB (OHCI0)
ATI Technologies Inc:SB600 USB (OHCI1)
ATI Technologies Inc:SB600 USB (OHCI2)
ATI Technologies Inc:SB600 USB (OHCI3)
ATI Technologies Inc:SB600 USB (OHCI4)
ATI Technologies Inc:SB600 USB Controller (EHCI)
ATI Technologies Inc:SBx00 SMBus Controller

Périphérique USB
Seiko Epson Corp. CX8300/CX8400/DX8400 (Périphérique USB composite)
Seiko Epson Corp. CX8300/CX8400/DX8400 (EPSON CX8300/CX8400/DX8400)
Seiko Epson Corp. CX8300/CX8400/DX8400 (Prise en charge d'impression USB)
Seiko Epson Corp. CX8300/CX8400/DX8400 (Périphérique de stockage de masse USB)
Analog Devices Canada, Ltd (Allied Telesyn) USB ADSL2 WAN Adapter (USB ADSL2 WAN Adapter)
Kingston Technology Company Inc. Périphérique de stockage de masse USB
Clavier
Clavier standard 101/102 touches ou clavier Microsoft Natural Keyboard PS/2
Souris
Souris Microsoft PS/2
Ecran(s)
Écran Plug-and-Play(Dell Computer Corp. DELL E196FP)