On AMD you probobly undervolted your cards to get them to use less power. On Nvidia you change the TDP of the card. You can do it in software with the nvidia-smi tool, or modify the bios. (voids warranty)
yes I modded the bios myself, 0.8V, stable at 860Mhz, 1250 mem (sapphire 7950 dual X oc)
are you saying that i can run under linux, before loading ccminer, a nvidia-smi sentence that will change in real time the TDP of every card??? WOW!!! I thought that the only way was modifying the BIOS!, do you have any link / tuto or hint how to?, I will get right on it!.
I decide not to modify the BIOS because if I fuck something up, there is no backup, in AMD 7950 there is a dual bios switch, if you fuck up your card (which I did more than 100 times when researching this) just move the switch to position 2, power cycle, move switch to 1, reflash, power cycle and good to go!, but nvidia has no switch!.
GPU's in my country are EXTREMELY COSTLY, and there is no such a thing like warranty here, if you fuck it up, it's gone, one card to the bin basket.
My Speeds:
Gygabyte 750Ti (dual fan, 6 pin connector, model GV-N75TOC-2GI) I got 16 of those:
4300 Kh in Lyra2v2
6000 Kh in Quark
EVGA 750 TI ACX FTW (only two of these, and seems to be the real deal, but i found out after purchasing the other 16
)4900 Kh in Lyra2v2
6800 Kh in Quark
I tested all your releases from 67 up to 78, the fastest one is 74 by FAR specially in lyra2v2