SGMiner 'Modded' versions are usually nothing more than standard sgminer compiled under 14.6 Beta (rev 1) Drivers. With some small .cl kernel changes to allow for the 14.6 Beta driver.

So yes SGMiner v5 will offer the same hash increase (if not more) if you use the correct drivers (or at least .bin files built with 14.6 Beta drivers)

On a 280X i get: (using SGMiner v5 -4.2.2-)
4.4MH/s X11
3.3MH/s X13
2.8MH/s X15
13.6MH/s Nist5

WHAT IS YOUR OVERCLOCK TO GET THESE RATES?


All run cool at avg 67.C max 70.C

It amazes me how many people have no idea what they are doing, and just look for other peoples mining compiles/software.
Do a little work, and you can do it yourself. Plus it is a LOT less risky, than downloading miners that are probably doing hidden mining.
I know i am falling on deaf ears, as nearly all you 'miners' are point-and-click warriors, and have no fundamental knowledge on what you are doing. If it wasn't so sad i would laugh. 

My Geforce 660ti (ccminer 1.2)
2.5MH/s X11
2.0MH/s X13
1.8MH/s X15
7.2MH/s Nist5

Nothing is impossible, but if you rely on everyone else to do it for you, you will have no advantage anyway. (as everyone else does the same)