View Full Version : Graphics card problems

05-19-2006, 02:11 AM
A few days ago, my computer was seemingly running fine, and had been running for days. But something happened. First, a pattern of misplaced dots appeared on the the screen, looking like a sync problem. (I was trying to calibrate the colour temperature on screen at this very moment and so thought the issue was with the screen...) A minute or two later, the entire screen changed to just a random pattern of red, green and blue. After maybe a 5-10 seconds the screen turned black and I quickly turned off the comp and left it turned off over night so it could cool down before I tried to diagnose it. (I've seen components overheating before.)

When I turned it on again everything was seemingly running fine as normal, till Windows was loaded. Then the graphics driver warned that the graphics card was getting insufficient power and was turned into a low power mode.

Now, I have pretty much power hungry stuff in this box. Things connected to the power supply are: the main board, 7 harddrives, 1 dvd drive, 6 chassi fans, the processor fan (runs on one cable from main board and one directly from the power supply), and two power connections (from separate cords) to the graphics card. Powered from the main board are also one bluetooth hub and the WiFi connection. Power supply is a single 480 W unit.

I've of course gone into my drivers panel and checked all the "warn me if anything is not behaving as it should". And I've kept the program up and running and checked it every once in a while. Sometimes I've noted that the fan stops. Usually just for a few seconds, but at least twice for so long that I've had to shut the computer down.

Now, in all likelyhood the problem is a broken fan. But it could be that the power supply is unreliable or that the fan is simply getting too little power when my dvd spins up, my CPU goes to full capacity and my hard drives spin high. How do you diagnose for these kinds of problems so you know if it's a second power supply or a new fan that you need?

05-19-2006, 03:18 AM
Well you could try if possible unplugging the power to some of the hard drives and see if the problem goes away. If it does, then a second power supply might be in order. If you can't do that or that doesn't fix it, I'd say try replacing the fan. Which fan is it that stops?

05-19-2006, 09:50 AM
What make/model is the power supply? I've seen these high wattage cheap power supplys screw pretty quickly when you're using them under high useage for long periods of time.

05-19-2006, 01:07 PM
Which fan is it that stops?Ah, I forgot to say that, did I? It's the GPU and GRAM fan on the graphics card.
What make/model is the power supply?Antec, NeoPower.