Originally Posted by Paul17041993
I think crossfire doesn't need reboots to enable/disable, I mean updating drivers doesn't even need a reboot most of the time...
and yea, usually you put the best card in the top (primary) slot, with the exception of some mobos that the primary slot is on the bottom (yea some mobos are like that for whatever reason), in most cases that crossfire doesn't work, the best card is usually chosen to do the job.
I don't have any real first-hand experience with crossfire though so I'm not 100% sure about the application profiles etc.
You don't have 1st hand experience uh?
Well I'm reading through the pages and with the previous crossfire I owned, I could have my main card overclocked at 1Ghz while the slave card would be at 775Mhz, what would crossfire do? Nothing at all.
Main card would wait for the slave card to finish processing, this translates to one card being pegged at 99% usage while the other was at 87% usage with applications that supported crossfire.
If you know of a game that does not have crossfire support you can create a custom profile just for that game disabling crossfire when its being executed (you only require to do this incase the driver tries to use both cards and starts artifacting). You never really need to manually turn off crossfire for anything, think of it as Nvidia Optimus, creating an app profile for low power GPU or high performance GPU.
On a side note...
Yesterday did a test run on my card at some OC's, managed to get 1100Mhz Core and 1350Mhz Mem. Didn't touch power limit or volts, benchmarked heaven with it without artifacting or crashes, gotta see if I can push further and what are the gains.