I just ran a benchmark on my desktop with similar specs and got about 2200 low-res score. However, looking at the CPU/memory gadget, I could clearly see that the memory bottleneck was what was dragging the score down. Two gigs of memory and a minor vid-card swap would probably do you well, but don't take that to the bank just yet.
Edit: Oh and the 465 like most of the 400 line needs a minimum of a 550W powersupply.
Edited, Jul 11th 2010 8:58pm by desmar
WoW Blackhand-US-Date of Retirement: 9/21/2010... /Sigh
Devari - 90 Rogue 85 DK Druid/Mage/Warrior 70+
FFXI - Shiva "Retired.... Or not? One more try, honest."
Desmar - 65 Sam 36 Mnk 18 Thf 12 War
FFXIV - Devari Garamond - Sargatanas 50 Paladin / Culinarian / Weaver / Armorer
Beta - Devaria Ariadne - Ultros - Pugilist