Bonjour j'ai fait une fonction recherche mais c'est pas trop mon problème je crois:
Donc je lance le jeu et tout fonctionne et quand je lance une partie, il se met à laguer :/

J'ai un Pc Portable Fujitsu-Siemens : AMD 64 Athlon X2 .
Donc je sais pas trop le problème si vous pouvez m'aider merci !

Et j'ai oublié, c'es Vista !

Apparemment, il s'agit d'un problème de performances, ton processeur à l'air assez puissant, mais pour le reste on ne sait rien donc:

Donne ton DxDiag:

http://ubisoft-fr.custhelp.com/cgi-bin/ubisoft_fr.cfg/php/enduser/std_adp.php?p_faqid=10437

Au cas ou le lien soit tronqué:

->http://ubisoft-fr.custhelp.com/cgi-bin/ubisoft_f
r.cfg/php/enduser/std_adp.php?p_faqid=10437

Modèle System: AMILO Xa2528
BIOS : Version 1
Memoire: 2046 MB RAM
Processeur : AMD ATHLON 64x2 Dual-Core ProcessorTK-53 1.7GHz
Fige de Pagination : 1205 MO Utilisé, 3124 MO POssible
Direct X 10

Désoler, j'ai pas précisé, il me faut plus de détail, pour cela: dans la fenetre de dxdiag tu peux cliquer sur "enregistrer toutes les information" ça va te demander dans quel fichier enregistrer, puis tu pourras faire un copier collez des parties interressantes, comme ça:

------------------
System Information
------------------
Time of this report: 10/22/2008, 23:09:10
Machine name: FLORIAN-XP
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.080814-1236)
Language: French (Regional Setting: French)
System Manufacturer: VIAK8T
System Model: AWRDACPI
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Athlon(tm) 64 Processor 3700+, MMX, 3DNow, ~2.2GHz
Memory: 1022MB RAM
Page File: 464MB used, 1993MB 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

------------
DxDiag Notes
------------
DirectX Files Tab: No problems found.
Display Tab 1: No problems found.
Sound Tab 1: The file hercwdm.sys is not digitally signed, which means that it has not been tested by Microsoft's Windows Hardware Quality Labs (WHQL). You may be able to get a WHQL logo'd driver from the hardware manufacturer.
Music Tab: No problems found.
Input Tab: No problems found.
Network Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (n/a)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (n/a)
DirectMusic: 0/5 (n/a)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: NVIDIA GeForce 6600 GT
Manufacturer: NVIDIA
Chip type: GeForce 6600 GT
DAC type: Integrated RAMDAC
Device Key:
Enum\PCI\VEN_10DE&DEV_00F1&SUBSYS_00000000&REV_A2

Display Memory: 128.0 MB
Current Mode: 1024 x 768 (32 bit) (85Hz)
Monitor: Écran Plug-and-Play
Monitor Max Res: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0010.9424 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail
Driver Date/Size: 4/19/2007 13:26:00, 4543616 bytes
WHQL Logo'd: Yes
WHQL Date Stamp: n/a

...

-------------
Sound Devices
-------------
Description: Gamesurround Fortissimo III 7.1
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: HERCULES\GF3_WDM_INTERFACE
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: hercwdm.sys
Driver Version: 5.12.0001.4102 (English)
Driver Attributes: Final Retail
WHQL Logo'd: No

Voila.

Ok ^^

System Information
------------------
Time of this report: 10/23/2008, 15:13:07
Machine name: PC-DE-JC
Operating System: Windows Vista™ Édition Familiale Premium (6.0, Build 6001) Service Pack 1 (6001.vistasp1_gdr.080917-1612)
Language: French (Regional Setting: French)
System Manufacturer: FUJITSU SIEMENS
System Model: AMILO Xa 2528
BIOS: Version 1.0
Processor: AMD Athlon(tm) 64 X2 Dual-Core Processor TK-53 (2 CPUs), ~1.7GHz
Memory: 2046MB RAM
Page File: 1790MB used, 2537MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 10
DX Setup Parameters: Not found
DxDiag Version: 6.00.6001.18000 32bit Unicode

------------
DxDiag Notes
------------
Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Input Tab: No problems found.

--------------------
DirectX Debug Levels
--------------------
Direct3D: 0/4 (retail)
DirectDraw: 0/4 (retail)
DirectInput: 0/5 (retail)
DirectMusic: 0/5 (retail)
DirectPlay: 0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow: 0/6 (retail)

---------------
Display Devices
---------------
Card name: NVIDIA GeForce 8600M GS
Manufacturer: NVIDIA
Chip type: GeForce 8600M GS
DAC type: Integrated RAMDAC
Device Key:
Enum\PCI\VEN_10DE&DEV_0425&SUBSYS_110C1734&REV_A1

Display Memory: 1007 MB
Dedicated Memory: 241 MB
Shared Memory: 766 MB
Current Mode: 1152 x 864 (32 bit) (60Hz)
Monitor: Moniteur Plug-and-Play générique
Driver Name: nvd3dum.dll,nvwgf2um.dll
Driver Version: 7.15.0011.5615 (English)
DDI Version: 10
Driver Attributes: Final Retail
Driver Date/Size: 7/19/2007 01:31:00, 5025792 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: {D7B71E3E-4765-11CF-6B61-073101C2CA35}
Vendor ID: 0x10DE
Device ID: 0x0425
SubSys ID: 0x110C1734
Revision ID: 0x00A1
Revision ID: 0x00A1
Video Accel: ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C ModeVC1_B ModeWMV9_B ModeVC1_A ModeWMV9_A
-------------
Description: Haut-parleurs (Realtek High Definition Audio)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID:
HDAUDIO\FUNC_01&VEN_10EC&DEV_0885&SUBSYS_17348405&
REV_1001
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: RTKVHDA.sys
Driver Version: 6.00.0001.5361 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 1/18/2007 18:56:56, 1729632 bytes
Other Files:
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
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

Description: Realtek Digital Output (Realtek High Definition Audio)
Default Sound Playback: No
Default Voice Playback: No
Hardware ID:
HDAUDIO\FUNC_01&VEN_10EC&DEV_0885&SUBSYS_17348405&
REV_1001
Manufacturer ID: 1
Product ID: 100
Type: WDM
Driver Name: RTKVHDA.sys
Driver Version: 6.00.0001.5361 (English)
Driver Attributes: Final Retail
WHQL Logo'd: Yes
Date and Size: 1/18/2007 18:56:56, 1729632 bytes
Other Files:
Driver Provider: Realtek Semiconductor Corp.
HW Accel Level: Basic
Cap Flags: 0xF1F
Min/Max Sample Rate: 100, 200000
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

---------------------
Sound Capture Devices
---------------------
Description: Microphone (Realtek High Definition Audio)
Default Sound Capture: Yes
Default Voice Capture: Yes
Driver Name: RTKVHDA.sys
Driver Version: 6.00.0001.5361 (English)
Driver Attributes: Final Retail
Date and Size: 1/18/2007 18:56:56, 1729632 bytes
Cap Flags: 0x1
Format Flags: 0xFFFFF

Apparemment tes pilotes graphiques sont à jour, mais dans le doute tu peux les réinstaller:

http://support.fujitsu-siemens.fr/Download/ShowDescription.asp?SoftwareGUID=55C5940C-7BF3-4F22-90DB-675D75F4CEA0&OSID=DD13C337-8EFF-4CFB-A589-72971D7BCBCE&Status=True&Component=nVIDIA%20-%20GeForce8400M%20(NB8M-SE)%20/%208600M%20GS

sinon, tu devrais essayer de diminuer la qualité graphique pour voir.