Also,don't forget that you beed the PSX bios to run ePSXe,I can't give you a link,but search using google and you should find it:
www.google.com
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System Specs:
OS: Windows Vista Ultimate x64 Edition CPU: Intel Core 2 Duo E8500 @4GHz
Video Card: MSI GeForce 8800 GTX Motherboard: ASUS Maximus Formula SE
RAM: 4GB OCZ XMS2 PC6400