Amelioration de mon pc (cherche avis/aide)

Bonjour,

Je viens vous voir car j'aimerais avoir de l'aide pour améliorer mon pc (3ans) car sur certain jeu, je sens bien qu'il pousse en "haut résolution"

Voici donc la configuration actuelle de ma machine :

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System Information
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Time of this report: 9/11/2011, 16:58:23
Machine name: *********
Operating System: Windows 7 Professionnel 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.110622-1506)
BIOS: BIOS Date: 06/16/08 11:02:10 Ver: 5.25
Processor: Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz (2 CPUs), ~3.0GHz
Memory: 3584MB RAM
Available OS Memory: 3584MB RAM
Page File: 1894MB used, 5270MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 64bit Unicode

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DxDiag Notes
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Display Tab 1: No problems found.
Sound Tab 1: No problems found.
Sound Tab 2: No problems found.
Sound Tab 3: No problems found.
Input Tab: No problems found.

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DirectX Debug Levels
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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)

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Display Devices
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Card name: NVIDIA GeForce 9500 GS
Manufacturer: NVIDIA
Chip type: GeForce 9500 GS
DAC type: Integrated RAMDAC
Device Key: ****************
Display Memory: 2033 MB
Dedicated Memory: 497 MB
Shared Memory: 1535 MB
Current Mode: 1680 x 1050 (32 bit) (59Hz)
Monitor Name: Moniteur Plug-and-Play générique
Monitor Model: HP w2007
Monitor Id: HWP26A6
Native Mode: 1680 x 1050(p) (59.954Hz)
Output Type: HD15
Driver Name: nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
Driver File Version: 8.17.0012.8026 (English)
Driver Version: 8.17.12.8026
DDI Version: 10
Driver Model: WDDM 1.1
Driver Attributes: Final Retail
Driver Date/Size: 8/3/2011 13:50:00, 15064168 bytes
WHQL Logo'd: Yes
WHQL Date Stamp:
Device Identifier: *************
Vendor ID: 0x10DE
Device ID: 0x0644
SubSys ID: 0x13301462
Revision ID: 0x00A1

J'ai sorti ça de Dxdiag si il faut une autre information, indiquer moi comment l'obtenir.

Encore merci pour votre aide