vic-20

Hi, I have a Dell Precision Workstation 650, currently running two Xeon 3.2ghz's, and I just found out that quad core Socket 604 processors exist. Would my computer be able to use two of these, or am I stuck with single core? Link to proc: http://www.ebay.com/itm/2x-matched-QUAD-Core-2400MP-8M-1066-xeon-E7340-SLA68-cpu-socket-604-2-40ghz-/201071929308?pt=LH_DefaultDomain_0&hash=item2ed0d227dc Thanks