is there a reason your down grading from the gtx660 to the gtx750i ?
the 750i has lower power requirements than your 660 so should work just fine in your pc, and "The card says something about an Extra requirement of a 6pin PCI-Express Connector (I don't know what this means." means it uses the same power lead your current 660 should be connected with.
looks like this :- http://www.allpinout...CIe)_6pin_power
"is there a reason your down grading from the gtx660 to the gtx750i ?" It is the TI Version of the 750 not 750I (eye) it is the (Tee Eye) version.
You may have misread. The "Asus GTX 750 TI" is a whole generation above the "Asus GTX 660"
https://www.komplett...2gb-physx-cuda#<----- Look at this link
sorry for late reply been away for a week, newer is not always better and especially not in this case.
so if your changing your gtx660 to a gtx750i because you think it is more powerfull and a better card for gaming then i'm sorry to say it's not and your just wasting your money, probably should have said a side ways step and not a downgrade because performance between the 2 is about equal.
your temps are fine, and if your having no problems running the gtx660 then you shouldn't have any problems running the gtx750i because it has lower power requirements than the gtx660.
here's some links comparing the 2 cards :-
thought i'd add the below link to help you choose a good upgrade card for your gtx660.
GPU Hierarchy Chart:- http://www.tomshardw...iew,3107-7.html
I don’t recommend upgrading your graphics card unless the replacement card is at least three tiers higher. Otherwise, the upgrade is somewhat parallel, and you may not even notice any worthwhile difference in performance.
Edited by terry1966, 26 September 2015 - 08:02 PM.