Comment augmenter les performances de mon PC?

Bonjour,

voici les caracteristiques de mon PC, je voudrais le rendre plus performant, que dois je acheter?que dois je ameliorer dans le system?

I N T E L (R) A C T I V E M O N I T O R

System Information Report
2/6/2008 6:54:14 PM

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General Information
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Product name Intel(R) Desktop Board D865GBF based system
Board model Genuine Intel(R) D865GBF system board
OS version Windows* XP version 5.1 Service Pack 2 build 2600
OS memory 522,992 KB RAM

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Processor
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Processor Genuine Intel(R) Pentium(R) 4 Processor
Processor speed 2.40B GHz
Bus speed 533 MHz
L1 cache Data Cache 8KB, Execution Trace Cache 12K Micro-ops
L2 cache Advanced Transfer Cache 512 KB
Form factor Socket 478
Stepping 7

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System
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Physical memory 512 MB RAM
Memory speed DDR333
Memory type DDR, Synchronous
Form factor DIMM
BIOS date 04/04/2003
BIOS size 512 KB
BIOS version P03 (BF86510A.86A.0024.P03.0304041329)

merci de votre aide a tous

Greg