Finally finished building and benching my new 5960X, 2x TITAN X, 16GB-2133 system. Found it could do 4.5GHz with decent RAM and CPU cache overclocks, but the temps and noise on the Nepton 120XL weren't fun. Switched down to 4.4GHz to hit a peak of 80-82C under 100% load for 1 hour+ at acceptable noise when using headphones, making it even quieter during gaming.
Similarly, dialled back my GPU clocks to maintain a relatively quiet system, in the end settling on 1,237MHz boost, with 1,853MHz memory and a modified fan curve.
Firemark Extreme:
http://www.3dmark.com/3dm/6457783 (should be #18 when the HoF updates)
Firemark Ultra:
http://www.3dmark.com/3dm/6458189 (#13 when HoF updates)
Extreme went from 9663 with OC'd i7-2600K and OC'd 980s, to 12398 with OC'd 5960X and OC'd 980s, to 16338 with OC'd 5960X and OC'd TITAN Xs.
It is for TITAN X (our deep learning box is configured with 4-Way):
http://www.geforce.com/hardware/desktop-gpus/geforce-gtx-titan-x/specifications Perf will be limited by CPU, game engine, game's specific coding, and SLI profile. Does Tomb Raider 2013 scale with 4-Way? That game's usually the poster child for multi-GPU scaling.