Experiencing odd power problems with computer

Darrk Intentions

Reputable
Jan 18, 2015
4
0
4,510
The specs:
Dell XPS 8900 (less then 6 months old)
Core I7 6700
Radeon HD 7970 Ghz Edition
550W power supply
16 GB Ram
1 TB Hard Drive
All drivers -updated- and clean OS re-install

The Problem:
I press the power button and the computer starts but has absolutely no video. No bios screen -nothing. I don't hear the video card fan rev up or the hard drive engage. After about 3 minutes, I have to do a hard shut-down (holding the power button until it shuts off). About 3 seconds later, the computer powers on by itself and then shuts off after another 3 seconds. When it does this, if I count 1, 2, 3 and hit the power button -it will start up normally about 75% of the time. The other 25% of the time it will not do anything for about 1-2 minutes and then start up by itself again with no video whatsoever or fan rev up or hard drive engage. Then I must do another hard shut-down and start the process all over again. Occasionally it will go into Windows recovery because it says I am having problems starting up and it says my hard drive is not found. I know my video card is under powered by the 550W PS but we are just talking about OS start-up here, not intensive graphics power during a game. Could it be the PS or is it something else I am missing? Also another problem I am having and not sure if it is related or not is that my clock is never correct on start-up. It is usually several hours off. I was thinking of replacing the motherboard battery.
 
Solution
test the theory, remove the graphics card and run off the intel GPU and see if removing the voltage draw stabilizes the system. quick easy test.
yes replace the button cell battery on the motherboard.

Darrk Intentions

Reputable
Jan 18, 2015
4
0
4,510
UPDATE: I removed the video card and the PS was more stable. Also the clock is keeping time now without replacing the battery. I fell back to an older card with the same PS (Radeon HD 6850). The results are that the system seems to be stable now. I think I better get a new PS before using the 7970 again. Both cards are getting old though so I will most likely upgrade the video card and PS at the earliest opportunity. Thanks for the comments and best of luck on your builds.