Which GPU will bottleneck my system? (Moved to 'New to PC gaming & upgrade advice')

[DanScott]

Hi,

I've been eyeing up a new GPU for a while and now that the prices are starting to come down I might finally be able to justify paying the price.

My question is, which Nvidia GPU would be bottlenecked by the rest of my hardware?

Motherboard: Asus P6T Deluxe
CPU: i7 920 @ 3.6 GHz
Memory: 16GB 2800 MHz

Ideally I'd like to play any game on ultra at 1080p at 60+ fps and maybe upgrade to a 144 Hz monitor in the future.

Thanks

Dan