What is better? 1 GTX 295 or 2 ATI 4890?

[Nashsafc]

If you're not thinking of upgrading, and have spent some money on an i7 processor, you can not argue about that. That 2 ATI 4890s are a better choice to be honest than having one gtx 295 or 2 gtx 275s. The performance of the 4890 x2 is amazing anyway. Already overkill since it is better than the single best GPU.

 

[Nashsafc]

The 2 ati 4890s would work on a 800 watt PSU because pcspecialist wourld tell me so if it wasn't powerful enough. They have a box down at the bottom where it tells you the errors of what you have configured/ or whether something is not compatible.