Dell XPS 8300 vs x51 Alienware: New PC options

[dragon16]

Hey, i'm from India. I'm stuck between Dell XPS 8300 and alienware x51. I'm not interested in custom build PC, couple of my friends have heating issues and it is cheaper to buy a branded one compared to their custom build PC.

Dell XPS:
i7 2600
8 gb ram
intel HD 3000 (I would be manually adding a 560 ti gtx to the current system, existing PSU 460 ~ 500 Watt i think)

Alienware x51:
i7 2600
8gm ram
555 GTX (OEM)

I would like to know if i would have to upgrade the PSU as well for the dell xps for the 560 ti to work. How much would be the performance difference ?

 

[newt183]

The gtx 560 ti needs at least 500w and two six pin power connectors, so as long as you got that, you should be fine.

Performance wise, I know the gtx 560 ti is a great card, and its better than a gtx 555. I'm not sure how much better though.