Currently have an Asus Dual OC 3gb, currently mining zencash.

Settings are:

+160 Core
+390 Memory
90w TDP

300 Sols.

How does this stack up?

You could do better.

80 Power
+200 core
+0 memory

use Bminer. You should be able to do 300-315 with a much better sol/w number.

I am running SMOS which doesn't have bminer.

And about +160 core is the limit before it crashes

Slowly increase memory by +50.