Coin/Algo: Alloy / cryptonight-alloy
How would I determine optimized settings? I guess I should see what I get on CN v7 to see if it's close to that 900 number. any suggestions of coins to try? Sumo?
Oh. Alloy is a harder variant of CN Heavy. You shouldn't mine CN-Heavy or CN-Alloy with CPUs, since their drop of hashrate in comparison to CN ist enormous, whereas GPUs aren't affected in the same way. CN-Heavy and CN-Alloy are tailormade for GPUs. How would I determine optimized settings? I guess I should see what I get on CN v7 to see if it's close to that 900 number. any suggestions of coins to try? Sumo?
Consider to mine a CN-Lite coin with your CPUs. You may reach around 2700 H/s with CN-Lite (Aeon, Turtlecoin) or about 1300 H/s with CN-Fast (Masari). 
If you want to mine CNv7, why not Monero? 
Sumo is back to ASIC friendly original CN. It's absurd to mine an ASIC coin with CPUs. 
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I didn't know that about AMD FX Piledriver dies. Your response is very informative. Thank you for that.
No problem ahhh, that's why I see all the negative comments on Sumo coin. So much has changed with the cryptonight algorithm since the days when I mined with a few lowly AMD cards. It is really interesting about all the variants.
Good to know about alloy coin. It makes me want to throw some GPUs at it for a bit.
Thanks for the CN-Lite and CN-Fast comments... just to be clear, for CPU mining, I want to look for CN-Lite --and-- CN-Fast algorithms?