Monitor goes black

Monitor goes to powersave-mode or I mean it goes blank. Sounds keep repeating the same (Looping). The problem is: to make monitor back online is to restart computer. Only happening on Direct3d- and Openglprograms , not in windows (desktop). Normally it happens about after 15 minutes but there isn't any regural timing, sometimes it doesn't even appear. I have already changed this card once before but it didn't help. Refresh rates / heat are not the problem . Does the card have some incompatible problems with my mainboard or maybe powersupply is broken (350W)? Or do I have some setting just in wrong position.

I have tested different versions of detonators.

MSI K7T266 Pro2-RU (Bios 3.7)
Inno3D Geforce Ti4200-8x
Athlon XP +1700
Windows XP SP1

Core V: 1,74
3.3 V: 3,28
5+ V: 4,84
12+ V: 12,18

Sorry about bad English


<P ID="edit"><FONT SIZE=-1><EM>Edited by ontelo on 06/23/03 05:27 PM.</EM></FONT></P>

Could it be? I have Enermax powersource EG365P-VE (two-year-old). I thought it would be worth of money.