Only problem I see is FSB. E8400 is 1333Mhz FSB. Although, The ASUS list does not show anything 45nm. P4 3.0Ghz is likely the best. New motherboard is likely worth it here. Intel P43/45 is the best right now. Hope that helps.
------------------------------System 1
PDC E5200|OCZ 4GB DDR2 800MHz|WD 640GB SATA |Seagate 160GB SATA
|Sapphire Radeon HD 4850 512MB|Corsair 650W PSU|GA-EP45-UD3R
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