Version 1.3 of the ttdclient has been released in both windows and linux versions.  The big change for this version is an updated settings.ini file that allows your client to compute between 1 and 16 ranges.  Lets say you have a 2080 ti that can do 1280 mk/s according to bitcrack but because of startup time your only getting 1020 mk/s according to ttdclient.  If you set ranges to 8 you essentially reduce the time wasted on startup by 87.5%.  As always I am available for assistance if you need any.

http://www.ttdsales.com/64bit/

I also have 4 amd 290x gpus for sale for $50 each or $150 for all four.