Current System Specs:
Tiger K8W Mobo (Dual Socket 940, AGP 8x)
One Opteron 280 (2 cores running at 2.4ghz each)
2 GB ECC Registered PC3200 DDR (64-bit)
Saphire Radeon X800 XT (500mhz, 256mb GDDR3)
Running Windows XP Pro 32
Upgrade Options:
Additional Opteron 280 (roughly $200)
4 GB RAM, Unfortunately it must be ECC, it must be PC3200, it must be 128-bit for my board to accept it (roughly $200)
HIS ICEQ3 Radeon 3850 AGP (roughly $200)
Which should I do to run Crysis, and why? Clearly if all 3 are necessary, $600 could get me a brand new PC, but I'm slightly overestimating the cost of some of the upgrades.