Hello, I was just wondering what a decent gpu would be? My budget for it is around 300-350 new Zealand dollars. I have picked this card so far but want to know if there is a better one for a similar price http://www.pbtech.co.nz/index.php?z=p&p=VGALTK00560
Generally speaking the more powerful a card, the more expensive it will be for that extra boost in performance. You can use the following performance chart to help you decide. This is a general performance chart, I recommend you click the link below to focus on the resolution that you play games at (or the closest one to it) and to look at the benchmarks for each individual game. In the review, the Radeon HD 7870 is used as a baseline. The Radeon HD 7850 has 87% the performance of the HD 7870 and the GTX 560 Ti has 80% of the Radeon HD 7870. That basically means the HD 7850 is 9% faster than the GTX 560 Ti.
Based on the HD 7850 price of $339 and the GTX 560 Ti price of $289. Based on price the HD 7850 is a little more than 17% expensive than the GTX 560 Ti while only providing about 9% better overall performance. So basically you are paying $5.55 more for every additional % of performance.
Like I said, the higher up you go in performance the more you pay for that performance. It's call the "Law of Diminishing Returns".
I don't know about SLI. I would suggest buying a single graphics card, going SLI means micro-stuttering, which can be very annoying. I'm looking for a gpu as well and I'm thinking of buying a gtx 570 or the HD 7850