Dual cards on nheqminer

I cant seem to get my GPU cards running. I have 2 Nvidea GTX 770s running and I am getting roughly 20 Sols/s but my card monitor shows 1 cards usage at 10% and the 2nd card is 0%.

I am using this line

nheqminer_zcash -l usa -u XXXXXXXXXXXXXXXXXXXXXX -t 6 -cd 1

If i change that to

nheqminer_zcash -l usa -u XXXXXXXXXXXXXXXXXXXXXX -t 6 -cd 0

it activates the 2nd card, but I still only get 10% usage.

Any ideas?

Disable SLI in Nvidia Control Panel :imp:

I did that, and even pulled the sli cable off the cards. Ive managed to get them both working with: nheqminer_zcash -l usa -u XXXXXXXXXXXXXXXXXXXXXXXXX -t 6 -cd 0 1 but they are still only using 10% each max