When' s the latest you want to wait?
Don' t buy anything unless the motherboard has a PCI-E 2.0. Your upgrade path will be pretty ***ing short if you don' t have that much.
OS: The most difficult question. 32 Bit Vista or 64 bit Vista? 32 bit has a maximum of 4GB or memory and that' s shared with the other add in cards. 32 bit should be dead by now, but the 64 bit has some compatibility issues. I would look into it. If all your software is supported I would go with 64 bit. I doubt future games will have issue with 64 bit.
Motherboard:
The X38 motherboards are already out are already out (at least one of them is). It' s basically the top dog now. It supports 45nm chips (penryn) as well as all the older chips already out. This motherboard is perfect except that it does not support SLI. It' s an overclocking champion, if you want to push Penryn quad core past 4Ghz you' ll want an X38 or X48 mobo. If you only want one card which I recommend. Just upgrade more often. If you always have the best card, you' ll always be able to play anything max settings.
http://www.ncix.com/products/index.php?sku=26337&vpn=GA-X38-DQ6&manufacture=Gigabyte CPU:
What you really want is the Penryn coming out in a few months, November I think. So buy a cheaper but still blasing fast chip just to take on UT III and Crysis. I would go for a Q6600 since Crysis supports quad core.
Videocard:
8800 ULTRA
RAM:
Some X38 mobo' s support DDR2 and some support DDR3. The one I gave as an example supports DDR2. DDR3 is obviously better and in the future it will be a lot better, but it' s very expensive atm. Some motherboards support both. I' m either waiting for DDR3 prices to go down or until I find a motherboard that has two DDR2 slots and four DDR3 slots. If you don' t mind paying 800$ for RAM then go with DDR3, more for future proofing than immediate benefits.
Physics Card:
UT III is supposed to support it properly, I think they hinted that some levels will only be accessible to people with the card. So do what I did, buy one. They' re cheap as hell now. At 300$ I said *** off, but I can live with paying 150$ for the card. Hopefully they won' t drop the support at the last minute.
Case:
Obviously a personal preference, but I strongly suggest the Coolmaster CM Stacker 832 Black. Add about 4 120mm fans and you' ll be good to go. Go for a large case at least. You can thank me when you' re building your PC.
http://www.ncix.com/products/index.php?sku=22231&vpn=RC-832-KKN1&manufacture=COOLERMASTER Power supply:
A lot of good options here, I recommend the 1200Watt Silverstone Decathlon. I have the 850 Watt version and it' s great. Whatever you get, make sure it' s at least 850 Watt and you have dual 8 PCIE pins for future videocards.
< Message edited by Agent Ghost -- 4 Oct 07 21:29:24 >