@vaxman the 3tb is currently writing 51-71mb/s and plotter is going at 14k nounces the previous attempt the plotter had locked up doing nothing for 8 hours I sat here played with the settings until I got the plotter to run as fast as I think it can.
The 3tb has 1 hour left then it will do the 4tb and lastly the 1tb
3072 640 4096 is what I'm running atm
4096,8192,1024,2048 all work as the first number but the rates drop to between 4000-9000 n/min especially when you run the 8192 I think much of the issue plotting on this machine stems from the ram it has if it had more ram or more vram my numbers would be better.
For the second number 128-768 work a 280x has 2048 stream processors so technically that should work as well but nothing over 768 worked for me.
The third number I wanted the plotter to report more responsively so I reduced it by half I read here that it doesn't effect plotting speed very much and can be set to 4 or up to 8192.
and the 3tb is done average 14333 n/min took 10 hours was done in gpu direct mode