Where is my limit?

[JeditOjanen]

Slightly different to the usual "spec me a card at £X" threads: I'm curious as to how powerful a GPU I could use without being bottlenecked, including SLI options. Current system is an i5 2500K (OCed to 4.60GHz) with 4GB RAM and a single 560Ti 1GB.

Also, what would I be looking to upgrade in order to shift the bottleneck - RAM or CPU?

 

[JeditOjanen]

Mobo and psu?

Yep, sorry. Mobo is the Asus P8Z68-V, PSU is Corsair HX 850W modular.

ALXAndy - it sounds from what you're suggesting that a GTX580 would be better than a pair of 560Tis? Not that I plan to upgrade now; I'm just fishing for the limit so that when I do, I won't buy anything I can't use effectively. I can always scale down if I can use more than I'd need.

Also, almost forgot: what is best for running a dual-display setup, one for gaming and one for browsing/other apps? Been meaning to go dual-monitor for ages but never got round to it.