x11 has never been profitable on NVIDIA. Mine Lyra2v2 or quark. The optimized AMD kernals are slow and use alot of power.
When using Xintensity of 1024 the client will report higher numbers than on the pool. (bug in the kuchur bins)
You probably right.
To avoid "panic" i decided to make some calculation on "kh/s per watt" comparsion:
(750Ti vs 280x)
NVIDIA:
$speedx11 = 3.35;
$speedlyra = 5.135;
$speedquark = 6.9;
$watt = 40;
$speed* / $watt * 1000
result:
nvidia
X11 kh\s per watt 83.75
Lyra kh\s per watt 128.375
Quark kh\s per watt 172.5
AMD
$speedx11 = 11.72;
$speedlyra = 13.06;
$speedquark = 16.19;
$watt = 180;
result:
X11 kh\s per watt 65.111111111111
Lyra kh\s per watt 72.555555555556
Quark kh\s per watt 89.944444444444
Well, based on number 750 Ti is faster. Numbers can't lie.
P.S. please keep in mind that ofcourse we need to understand that it will be different money for full rig setup, but this difficult to calculate because all of us have different prices for cards (new or used one)
P.P.S. but amd also has benefit. you can mine eth with 280x.