Blue/Green Blocky screen

[Tai-2]

Every now and then when playing FSX my monitor will freeze into a blue sometimes green blocky screen, as in the entire screen turns that color, bit is blocky like.

Other games like MWF2, Bad Company 2, etc do not do this, only FSX.
Is it a sign of possible over heating?

The card is Radeon 4830 HD with stock cooler on it,
Room temps are 78-83.F
System temp during gaming is around 40-45 C

EDIT- Also, have latest drivers,

[HarvesteR]

That sounds a little familiar... I hope your problem isn't the same as the one I had...

So the computer freezes entirely when this happens right? does restarting fix the problem? do you see these artifacts outside FS?

Just to check, do these artifacts resemble aliens from space invaders? 

If so, you might have the same problem I did.

Hopefully that's not the case... if you could post a screenshot, or if that's impossible maybe a picture of the screen when the problem occurs, it would be very helpful.

Cheers

[Tai-2]

[quote]That sounds a little familiar... I hope your problem isn't the same as the one I had...

So the computer freezes entirely when this happens right? does restarting fix the problem? do you see these artifacts outside FS?

Just to check, do these artifacts resemble aliens from space invaders?