IBM Intellistation Pro Workstation DUAL Opteron 2.8GHz IBM is selling these for over 2000.00 at 50 something percent discount. The company has had one complaint since 98 and that’s been resolved. (BBB) Information from IBM : ftp://ftp.software.ibm.com/systems/support/system_x_pdf/31r1995.pdf Supports up to two AMD Opteron microprocessors (two 64-bit memory channels per microprocessor) v 1 MB Level-2 cache v 800 MHz front-side bus (FSB) with data rate of 1.6 GHzMemory: v Minimum: 1 GB v Maximum: 16 GB (depending on your configuration) v Type: PC2700 (2 GB DIMMs only) or PC3200 double-data-rate (DDR) registered v Connectors: Four or eight dual inline memory module (DIMM) connectors, depending on your configuration The company will sell you the 2gig memory chips at 60.00 a pop I understand for performance you want two sticks per processor at least for each processor running at 64bit. Add a bad ass video card and get some cheap drives to run striped and BAM! I bet even Vista would run well on one of these babies