The 550 ti was a choice i made is do to the system im putting it in.
The PCIe is 16 2.0 and the PSU is 500w
My current screen rez is 1600x900
In the near future i want to up the board and the PSU and use a double card. and this card supports it. I am under the impression that 2 550 ti would be better than 2 5670's or am i way off the map here. I have not joined 2 before . Have not needed it.
If you are taking advantage of the mail in rebate of the Zotac 550 ti to bring its cost to $99.99, then it is a fine purchase. The 550 ti should be great at 1600x900 but may be a little underpowered when you move to 1920x1080 gaming.