(It's Back)Two Graphics cards, Five displays, Low Framerates
Is there a limitation in the way IS handles multiple graphics cards that causes this?
If I run 4 sessions, set up as individual game profiles in IS, in different displays (windows extended) as the third and fourth sessions start all framerates drop into the low teens (generally 12-15 fps) on the login screen. They then stay that way when entering the game and even when closing some of the sessions down.
If I run three of my displays (connected to an ATI 5850) in eyefinity as a single huge desktop and create a window layout within that space I get framerates of 60 on main and 25-30 on the slaves.
If I try to run three sessions in eyefinity and one on the secondary adaptor (an ATI 4800), fps drops to sub 15 as soon as a session opens on the secondary adaptor.
I realise the setup attempts to push a lot of pixels around, but as I understand it, with instant swap turned on, the four sessions are effectively running at full resolution anyway.
Just as a point of reference, this is the same system I used two years ago to quad box, although at the time I used two displays connected to the 4800 with acceptable performance.
Running with IS instant swap off does not help, but keyclone is able to run four session spread across my displays with reasonable framerates (at the expense of ISBoxers functionality).
I've no plans to go back, I'm already using functions of ISBoxer that are not possible with keyclone, but since I have the displays it would be nice to have all four toons with their own display =D.