I decided to upgrade an older computer I have to use for nothing but distributed computing (World Community Grid), CF2, and FS9. It had a Leadtek A380 - 5950 Ultra video card. I installed a 7800 GS card a few days ago. It's almost UNBELIEVABLE how much difference there is between those two cards!
If you have a pretty good computer (CPU, PSU, RAM, etc.) don't listen to those that tell you to junk it and build a PCI-E system because yours is obsolete. You can upgrade your old video card and see a performance increase right now and upgrade to the latest and greatest DX 10 stuff in a year or so after things settle down a bit.
If you have an Intel P4 system take a look at eBay for good deals on CPU's. The Intel CPU's have dropped in price quite a bit and if you are careful you can get a CPU that would have cost you ~$500 a few months ago for less than half that amount. You can upgrade that old AGP system with a new video card and maybe a CPU for a lot less than a new PCI-E system will cost.
I switched from a 2.8 GHz Northwood to a 3.4 GHz Northwood at the same time I switched the 5950 Ultra for the 7800 GS and my 3DMark06 scores jumped from ~ 500 to ~ 3000. Cost, including shipping, was a tad under $400 and I still have both the 2.8 CPU and the 5950 video card. Haven't decided whether or not I am going to sell them (probably) or keep 'em for spares.
I still have my PCI-E system with a P4 670 and a 7800 GTX if I want to run something that needs a little more horsepower. (I'm also in the process of building a Conroe system and will be using some of the parts from this PCI-E system in it eventually.)
If you have a pretty good computer (CPU, PSU, RAM, etc.) don't listen to those that tell you to junk it and build a PCI-E system because yours is obsolete. You can upgrade your old video card and see a performance increase right now and upgrade to the latest and greatest DX 10 stuff in a year or so after things settle down a bit.
If you have an Intel P4 system take a look at eBay for good deals on CPU's. The Intel CPU's have dropped in price quite a bit and if you are careful you can get a CPU that would have cost you ~$500 a few months ago for less than half that amount. You can upgrade that old AGP system with a new video card and maybe a CPU for a lot less than a new PCI-E system will cost.
I switched from a 2.8 GHz Northwood to a 3.4 GHz Northwood at the same time I switched the 5950 Ultra for the 7800 GS and my 3DMark06 scores jumped from ~ 500 to ~ 3000. Cost, including shipping, was a tad under $400 and I still have both the 2.8 CPU and the 5950 video card. Haven't decided whether or not I am going to sell them (probably) or keep 'em for spares.
I still have my PCI-E system with a P4 670 and a 7800 GTX if I want to run something that needs a little more horsepower. (I'm also in the process of building a Conroe system and will be using some of the parts from this PCI-E system in it eventually.)