Originally Posted by Crystal_Castles
SLI GTX 460s is a decent choice, and should be a good bit faster than what you currently have.
If you're not dead set on nvidia, you could snag a pair of 6870s which would be a bit faster than two 460s for not much more money: http://www.newegg.com/Product/Produc...82E16814102948
It depends on the GTX 460, if you are going to overclock, and what kind of cooler it has / case airflow.
If you don't plan on overclocking, and you don't/won't use 3D Vision or PhysX then the 6870 is a very good card.
When both are stock a 6870 will outperform a GTX 460. However, the 6870 really doesn't have any overclocking headroom, and there are a couple of different GTX 460 models out there that will reach 900Mhz on the core. Once overclock a GTX 460 should close the gap on the 6870, and in some benchmarks preform better.
I decided to go with a GTX 460 myself. However, the two you are looking at are a bit expensive for a 460, and I'm not sure how much overclocking headroom you are looking at. You want to find one that will keep the card cool with a voltage bump, and you also need to take a look at your motherboard. Is there at least 1 PCI slot worth of air space between the 2 cards, or will they be sandwiched against each other?
I was able to snag a MSI GTX 460 Hawk for $144.99 + $30MIR. There seems to be a deal like this on the 460's every month or so. You can also find some GTX 460's that people are selling on here used ~$100.Edited by AtomicFrost - 10/19/11 at 1:29pm