Yesterday I looked at the x11-x15 algos again. I have found some improvements.. The next version of the private miner will have a boost in x11-x15 , qubit , whirlpool, whirlpoolx and perhaps quark.
Can i have a HaleLuja!
Oh shit, i only have AMD cards

A wellcoded x11 kernal should be able to do 4-5MHASH on the 750ti @ 50 watt. I haven't done any work on the x11 kernal in 1 year.. With my code your old AMD cards will be obsolete.
If you can make 5 mhash on 750Ti x11 i will personally pay you 1 btc.
P.S. right now it's 3350kh\s
I will try. It will be in my private miner. You should buy it to support my work. 1-2% faster already in the x11 algo.
release 1 sp-mod private (bether than release 78):
X11 is up 30khash (750ti) (+1%)
x13 is up 100khash(750ti) (+4.3%)
x15 is up 66Khash(750ti) (+3.3%)
quark is up 200khash(750ti) (+3.2%)
lyra2v2 is up 250khash(750ti)(+6%)
Results vary a bit between the different cards and the clock rates. But they are almost always faster.