Is my mining potential for my GPU's maxed out? (lyra2z-ZCcoin mine)

[Donut164]

I am attempting to mine Zcoins (lyra2z)

I have 2 AMD Radeon Sapphire HD 7970 3GB GDDR5  GPU's and I'm only getting an average hash rate of 154KH/s each.
(CPU: AMD FX 6100 6 Core)

Am I getting my maximum potential for mining? I feel as if 154 is low. I've attempted to overclock but my system crashes on windows 10 every time I try. I was lazy with the OC'ing though and didn't really try, just turned stuff up a little bit and my rig would lag real bad and I would get your device stopped responding or whatever.

What do y'all think?

Thanks.

[CjMapope]

i think your font is too big

haha no, but yes, you are about maxed on those GPU's at 150kh/s or so, actually i have a workstation that has a 960M, gets same hash ;p
you can check the potential of your GPU or any Nvidia GPU at: http://yiimp.ccminer.org/bench?algo=lyra2z&chip=0
Lyra2z is great as it uses such little power
Happy Hashing!