Right now, either the GTX 280 or 9800GX2 would be your best bets. If you can wait a few weeks, the 4870X2 should be better than either of those, albeit at about $550.

EDIT: However, if you want to go Crossfire, two 4850s cost ~$400 and beat both the GTX and the GX2 in most games.

I really want that IFX. How big is that? Is it worth the money?artiedeadat40

I don't know much about the IFX, but judging from the reviews I saw and the lack of hype I've seen on message boards, it's not an improvement over the TRUE unless you hook up two high-speed, high-noise fans to it. Also, it's huge, heavy, and unwieldy, and doesn't offer much beyond maybe another MHz of overclocking overhead.

How is this sink? Would I be better off getting a true?artiedeadat40

If you were a silence enthusiast, the Thermalright would be better. As a gaming heatsink, the TRUE is still better, but not significantly. It'll save you a few degree over Tuniq, but it also costs a little more, and the installation is similar for both.

This might be your problem: You're supposed to have a 3-pin connector for the motherboard, not the 2-pin one. I took a picture of my system as an example:

Assuming you have the stock fan in your Tuniq (as I do), yours should have two connectors: a 3-pin for the motherboard and a 2-pin for the fan controller.

EDIT: As an aside, if you bought the Tuniq for quiet operation, you bought the wrong heatsink. It's pretty quiet on its lowest setting (at about 1000 RPM), but it's not up to the decibel quality of a Scythe Ninja or even a Thermalright Ultra with a quiet fan attached. If the rest of your system is loud, you shouldn't hear it, though.