I noticed on my expert tab there is a setting in the extra client options that says open-web-control true, is this necessary or is it just the command that tells FAH client to open a browser. Can I disable opening a browser and set it to open the advanced interface?

Thanks!

Wouldn't folding an all cores increase PPD? That way more threads and cores are dedicated to folding, along with the GPU's.
 
Right now in my folding rig I have 3 590's folding and my 990X (6 GPU's and 6/12 cores/threads). From what I'm readying, I should change it so I'm only folding on 6 threads instead of the full 12?

Sorry my help post wasn't clear enough. When I said 2 cores for a single or odd number of GPU's
was so with SMP folding, it "SMP Folding" would always be done on even number of CPU cores.
A single CPU core is all that is needed per GPU, but SMP works best on even number of CPU cores.
With 3x GPU it'd be best to leave 4 cores open so that the SMP is working on "even #" the other 8 CPU cores
of your 12 Thread CPU. Read back threw the complete thread may help you better, please post any other
question you may have and me or someone will try to help.
 
Edit: if folding on both of the GPU's of your 590's a single CPU core per 590 should be enough
and I'd still go the route of 4 CPU core free for the 3x GPU's and 8 cores used by SMP.
Sorry I was thinking 580 when I first posted even tho I saw the 590 in your post.
A single GPU doesn't use a full 100% CPU core with core 17, but with the use of a free CPU core
to use as it needs the PPD is much improved. The actual usage if I remember correct is 0%/35% max
and that's the reason I'd say that 1 590 should work at or pretty close to its max PPD with 1 CPU core.
Being that you have 4 free any extra need by the 6x GPU's will be off loaded to the forth free core.
You can also test 6x6 6 free for the GPU's and 6 for SMP to use to see if there is a improvement in PPD in your case.