The problem is definitely heat and the HDMI connector on the monitor. That corner gets very hot, even hot enough that a fan blowing from behind wont address it.
Most definitely. After getting the GTX260 and finding out I had to hack the EDID in the registry to make the stupid card realize it is a monitor and not a TV (and therefore reducing the color gamut from 0-255 on RGB to 15-235 [or something] ) I took the easy way out and plugged in the D-SUB.
Ding! No more blackouts. And my eyes can't tell the difference in the things I'm doing, so I'm leaving it at that.
Doesn't help those of you doing the Xbox/TV thing though, or who absolutely have to have a Digital-digital connection for whatever reason.
BB