The 660 Ti is about 20-40% faster than the 750 Ti, depending on the game settings/benchmark level and resolution. It is a decent card for 1080p gaming. Even the none Ti 660 is faster than the 750 Ti. I agree with stat1cx, 650 Ti Boost is on the same performance level as the 750 Ti.
It isnt. Ive been assessing upgrade options for my 660ti and the 770 seems about the minimum to bother upgrading to.
I went sli I get around 780/Titan performance in some games 1st time sli really pleased not had any problems
660ti is a great gpu, but 192bit a low still better i myself own it, and it has great performance in most game. except AMD EDGE games.
To be honest when sli 660ti is slow and can't play games the 780 will also be slow on high settings so we will all be looking to upgrade to much newer and faster hardware 660ti in sli awesome at 1080p Titan performance for £440
Not really it is the upgrade. When it is no longer powerful enough replace both cards with the latest greatest card.
Can't argue with that. But it's also a good idea to sell and move on to a faster single GPU, then SLi that if you need more performance now.