hi all, I'm contemplating a new barebones kit system for FSX one isAMD and Radeon basedMSI K9A2 Platinum Motherboard - AMD Phenom X4 9850 Black Ed. 2.50GHz Retail - Qty: 1 Corsair 4096MB PC6400 DDR2 - Qty: 1 Maxtor DiamondMax 21 500GB Hard Drive - Qty: 1 Visiontek Radeon HD 4850 512MB PCIe 2.0 - Qty: 1 Ultra Aluminum Mid-Tower Case - Qty: 1 Ultra X3 ULT40064 1000-Watt Power Supply - Qty: 1 one is Nvidia and core 2 quad basedEVGA nForce 680i SLI Motherboard - Qty: 1 Intel C2Q Q6700 2.66GHz OEM - Qty: 1 OCZ SLI 4098MB PC6400 DDR2 - Qty: 1 Ultra M923 Full Tower ATX Case - Qty: 1 BFG GS-650 650-Watt ATX Power Supply - Qty: 1 EVGA GeForce 8800 GT 512MB PCIe w/Dual Link DVI - Qty: 2 Seagate Barracuda 7200.11 500GB Hard Drive - Qty: 1 LITE-ON DH-20A4H-08 Burner with Lightscribe - Qty: 1 I'm thinking XP 64 as an operating system.which system will give the best , most stable platform for FSX?Thanksstan

StanI believe both systems will suffice where FSX is concerned. Is there any particular reason why you would choose XP x64 over Vista? With 4GB RAM and quad core processing FSX should run handsomely with Vista, especially 64bit Vista. Don't get me wrong here. I run FS9 and FSX in XP x64 quite well, but I also have Vista for the benefit of DX10.Scratch1964

sorry for the late reply......overtime has taken a toll on my free time.I have heard too many Vista horror stories as of late.I actually know no person who likes that OS yet. Several guys on the PMDG Md-11 tech team with me have reported painless, very stable Simming with XP 64. I just cant decide whether the ATI or Nvidia graphics is the way to goStan