GTX 660 vs GTX 560ti SLI

[azaran]

Have a buddy who has the option of running a single GTX 660 or run two GTX 560ti in SLI. I don't usually deal with SLI so I was hoping someone could give me some solid input on whats going to give him the best performance.

The cards in question
N560GTX-Ti Twin Frozr II/OC
vs
EVGA 02G-P4-3063-KR

His usual setup is to run games like TF2, Dirty Bomb and other Steam non AAA titles and stream it over Twitch using OBS.

The 560ti's were hand me downs from friends to get his system running, and the 660 is a new had me down offer of an upgrade. So buying new hardware isn't part of the equation.

Relevant specs on the system:
i5-4670k
ASRock Z87 Extreme4
16GB DDR3 1866
XFX Core Edition PRO650W

Thank you for any help

 

[JackNaylorPE]

All very interesting but as someone who is still using the nine year old 620w PSU that was running SLi'd 560Ti's, SLi'd 660ti's and now SLi'd 970's I'm no longer convinced by such numbers.

Sounds like a S12 or M12 ... excellent PSU. Wouldn't be surprised to see that thing handle 600 watts w/o a struggle. I wouldn't expect 10% degradation to handle any capacitor concerns.

A 970 can pull as much as 213 and a 4670k 135 ... that's 561.. I wouldn't be too worried, when I run Furmark, biggest CPU load is aw was 40 watts, so say 426 + 40 + 60 for everything else. With an M12 / S12 620, I'd be content. Would love to see what a Kil-o-Watt reads tho.