now I setup Yosemite instead of Sierra, and switched off v-sync with QUARTZ debug. with 4 screens I have 100-120 fps at output, but when I add anoter one screen in resolute fps fade down to 24 fps. it not depend of thunderbolt bus - 0,1,2, where I connect last display...Anothertom wrote:This is unlikely to be a v-sync issue as that would reduce frame rate to one of the factors of 60 (so 30 then 15 fps), and if you're using active v-sync then that deactivates when frame rates drop below 60fps.
I use four apple dual-link dvi adapter with dedicated usb and power charger for it and one solidmate minidisplayport 1.1 to dual-link dvi with dedicated usb https://www.monoprice.com/product?p_id=6904 - is it good enough to use?Oaktown wrote:Make sure you only use active adapters with the AMD cards.