I've been on 3x 670 4gb cards since early 2012...they've been great for my 28" surround setup...mostly. Some obvious lagging and stuttering and turning down this and that trying to make it run better in games like Bf4, GtaV. Decided it was time.. I ordered 3x EVGA 06G-P4-4995-KR 980 Ti's..2 for me, 1 for my brother. WOW.. all I can say. Never thought I'd see games run so smooth at 5760 x 1200. Only tested Gtav and Bf4 so far, but those are some of the most taxing, so other than maybe Crysis 3 which I'll be running later I doubt I'll be disappointed.
 
  Only complaint if any is that I got no game codes. Wanted to order from Newegg.com to order on my newegg account, but with the lack of stock and limit of 1, a rushed out game wasn't worth the wait, I.m.o. I found this link http://forums.evga.com/Watercooled-EVGA-GTX980Ti-SC-ACX-20-SLI-m2355179.aspx to use Ek block and stock Evga backplate, but after having the sweet lights on the 670 XSPC blocks I'm holding out to see if they will release a block for the Ti. Temps on air in game are 69c max on top card, 58c max on bottom card, fan speed around 80-90%, acceptable enough to wait on XSPC!
 
  I never wait this long to upgrade gpu's, but I was saving for my first home until last year. I almost upgraded to 970's because the price / performance and fact the XSPC 670 blocks were compatible seemed sweet. But I couldn't justify the cost at the time. The 980 Ti's were a no brainer after seeing all the reviews!
 
 Firestrike with 3 x 670's clocked to 1200 on the core =14198
 Firestrike extreme with the same clocks = 7740
 
 Firestrike with 2 x 980 Ti's, stock clocks that boost to 1278 =21342
 Firestrike extreme with the same clocks = 13842
 
More importantly than benchmarks is the smoothness of Bf4 and GtaV.. ALL settings maxed in both games, they run and look amazing!!

Every setting in both games absolutely maxed. 2750 gb Vram right now in Bf4, Hainan Resort with 50+ people, which is weird because it used to be well over 3, pushing 4 with the 670's! I only played maybe 20 minutes or so on Gtav, but I looked last night, was sitting a little over 5 gb vram. I never felt so good about spending money..I can't stress enough how smooth the gameplay is...

Keep in mind I'm running 8x msaa....looks real pretty.

GtaV....no msaa = 60-95 fps per Fraps and 4gb vram used.
GtaV....2x msaa = 55-85 fps per Fraps and 4.4gb vram used.
GtaV....4x msaa = 45-70 fps per Fraps and 4.6gb vram used.
 
All of those were driving at night, all settings maxed with 1 exception..Nvidia TXAA, at 5760 x 1200....I love these video cards!

raw2dogmeat
GtaV....no msaa = 60-95 fps per Fraps and 4gb vram used.
GtaV....2x msaa = 55-85 fps per Fraps and 4.4gb vram used.
GtaV....4x msaa = 45-70 fps per Fraps and 4.6gb vram used.
 
All of those were driving at night, all settings maxed with 1 exception..Nvidia TXAA, at 5760 x 1200....I love these video cards!

Thanks for the results :) just wanted to make a point to a friend that 4gb is not enough for games.... or bareeeelly enough