Just hooked up my two U2410's to each side of my Samsung 25.5 and it is just incredible, I run iRacing sim and this take it to a whole new level! Hell I couldnt even get my wife off it and she never had the slightest interest in running laps....now she does...LOL. So far no problem other than a occasional blink on my right monitor which is connected via display port. My 5870 seems to do real good with no issues. Thanks for all the info here it was a big help!
Are you running with a dp monitor? Any adapters? I have a 5970 and 3 1680x1050 monitors. 2 with dvi and 1 with minidp to dp adapter then dp to vga monoprice adapter. I just ordered a dell p2210 dp monitor and a monoprice minidp to dp cable. I will be hugely unhappy if I sprung another $250 and I still get the on/off of the dp monitor. I have read here that a dp monitor is not getting the on/off flicker that the vga and active dvi adapters are getting. Thanks for the reply.