Ive been having some unusual flickering on my 30 ACD and I need some advice. But first, a bit of a back story. My 30 ACD was always a bit wonky. I was flickering since I can remember. It was more intense with my old MP 1,1 with 8800 GT. It used to go all out into some sort of static on some days, but a simple monitor sleep cycle would reset it. Since I got my MP 5,1 the 30 ACD flickered much less, and it never went into full out static mode. Again, a simple monitor sleep cycle would solve the issue. At one point I got the power brick replaced, thinking it was at fault new one helped, but didnt solve flickering completely. Few days ago the monitor stared to exhibit some unusual flickering and blue pixels while the video card was under load (in windows 7, playing a game). My current monitor setup is as follows: 30 pulled into 5870 through DVI, 23 ACD plugged into GT120 (slot 2) through DVI. Frist time I saw this was few hours into gaming. The whole display showed a bunch of blue pixels and after a while it started to flicker. Ive quit the game and booted into Lion, but the same stuff kept on showing, even during gray screen boot. After the initial weird flicker + blue pixels I turned off the computer and went away for 4 days and got back into testing yesterday. Ive booted the system into windows yesterday when I got back (wanted to see the temperatures + fan seep of the 5870). The temps where in mid 30C while the video card was idle fan seep at 20%. After few minutes in Windows, blue pixels started to appear (it didnt flicker), but they went away after about 30seconds (power cycling the display didnt help). Ive started the game and again few minutes into it blue pixels appeared followed by intensive flickering. So Ive disconnected the 23 and 30 ACD, plugged in the 23 into 5870 (DVI) 23 didnt flickered; plugged in the 30 into GT120 (DVI) it flickered + blue pixels (23 was disconnected) ; plugged into both 23 into 5870 and 30 into GT120, 30 still flickered. While all the crap was going on the 5870 was at load with temp of around 75C and fan speed of 27-30%. While I was screwing around with the entire monitor plugging the flickering + blue pixels magically went away with my original configuration (30 into 5870, 23 into gt120). So Ive started to play a game to see what happens. Well, nothing really happed for about 3 hours 5870 was in mid-70s Celsius, the fan speed was between 27-30%. During that time I had a window open so the room was rather cool. At one point, Ive closed the window and within 20 minutes or so the monitor started to show a bit of flickering, and then went into full-on flickering with those damn blue pixels. 5870 was at about 78C. For the hell of it, Ive opened the window again just to see what happens. Within 5 minutes the video card temperature dropped to high 60s, flickering stopped and the blue pixels went away. I all honestly I dont know what to make of this crap. Initially I though the video card was simply overheating but since the monitor was flickering on the GT120 and while 5870 was idle I dont think thats the case. Im thinking that the 30 is screwed up - either its overheating or the build-in DVI cables trash. Few weeks ago I got a 900 watt UPS with MP, 30 and 23 plugged in it draws at around 450 watts while playing, and Ive only seen it spike to about 550 when waking from sleep, but again I dont think it contributes to my monitor issues. Any ideas? Any further tests I can do to make sure if its the monitor not the video card, or heaven forbid my mac? Ill be calling Apple Care, but I rather give them a call knowing a bit more. Id appreciate any help. adrian side note: at one point, before I got the gt120, the 23 was plugged into 5870 through single link MDP/DVI. The 30 was still flickering, 23 never did + Ive changed the power bricks when the 30 was going nuts on me yesterday and it still was doing the same with another brick.