I'm a little behind the curve (two years).
HP DVD+-RW burner
Antec 902 case (hey, it's very durable and has decent cooling, and ended up being under $100)
Western Digital 640 GB SATA HDD @ 7200 RPM
ASUS M4A79XTD EVO AM3 790X mobo
Phenom II X4 955 Black Edition (with a CoolerMaster Hyper212 Plus on it)
G.SKILL Ripjaws @ PC3 12800 (in theory - mobo doesn't like these at full speed, never totally stable, so they're running slower unfortunately)
Antec TruePower TP750W Power Supply
EVGA GTX260 core 216 SuperClocked Edition
Anyone have thoughts on how I'd do with newer games? Only PC game I've played that's less than a year old is Deus Ex, which is very playable but doesn't run perfect... Think I'd be pretty OK if I just upgraded the video card.
Depends on your definition of "playable". Personally, I play PC games because I want the best... best graphics, best performance. Me personally, I'd say that the 260 needs to go. It's very aged, and while it will run a majority of games decently
, it won't run new games on high or above settings very well, and you will run into issues because of lack of VRAM on the card (I'm guessing it's 1GB?).
As Jeeba said, pick up a 6950 2GB
, they can be had for roughly $210-220 now. Try to keep an eye out on the comments section of the card you're buying, as not all 6950's unlock. Jeeba probably bought his a while ago, I bought one a week or so ago and lucked out that mine unlocks (probably because I bought it at a local shop, it'd probably sat on the shelf for a while).
As for the rest of your system, you're great. Games these days use very little CPU resources, as most of the intense graphic and AI work has been shifted to the GPU. I'd overclock your 955 a little, try to hit 3.8-4.0Ghz, if you can't on a 212 grab a Corsair H40 or H60. As far as RAM, what you have is good, and as long as you have a minimum of 4GB you're fine. If your motherboard is slowing down the timings or speed of the RAM, replace your board.
Like most of PC building, it all depends on how cushy your wallet is, and what you're after. There is a lot you could do with your system without breaking the bank and replacing everything, but at the same time if you dont expect the best out of it, it's fine how it is.