Hello there, that version you have there is quite outdated, so you should try the latest build from here:
DolphinWx - Windows Live SkyDrive
Just try them out and see what works best for you.
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OS: Windows XP x64 edition
Processor: AMD Athlon 64 X2 5200+
Motherboard: MSI K9VGM-V
Memory: 2 Gig DDR2 RAM
Graphics card: NVIDIA 7300 LE 256MB
Power Supply: 500W!!
