- Aug 30, 2013
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My Gigabyte B75 chipset mainboard has started acting up recently. While working, it freezes completely, and shuts down after a few seconds into freezing. It starts again automatically, but gives continuous beeps and doesn't POST/give any display at all. Now if I swap the RAMs from one slot to the other (Blue-Blue to White-White) it runs fine for a few minutes, sometimes hours if it's lucky. And then the same problem repeats. I'd sent the board for warranty RMA to Gigabyte, when they replaced the bad part (didn't tell me what it was.) It ran smoothly for 3 days, and today it's started acting up again in exactly the same way. I've tried to test it with different RAM sticks, to no avail. Today I brought an old 350W PSU to test and the board didn't POST either, until I placed the RAM(s) into other slot(s).
Now, I'm in a quandary whether it's a permanently faulty mainboard or a faulty PSU that sometimes (note the word SOMETIMES) sends spikes that damages the mainboard. Because when I test the voltages from the PC sensors as well as with a multimeter, they seem all right.
Here's a screenshot of the HW monitor page. Does the +3.3V seem a bit high?
I suspect the PSU because, previously when I had a Cooler Master 650W PSU, never did any problem crop up in one year. Recently when I switched to an Antec 550W PSU, the problems have started after a month or so. Can it be the PSU? Or a coincidence?
So is it really the PSU or the mainboard?
Please help.
Now, I'm in a quandary whether it's a permanently faulty mainboard or a faulty PSU that sometimes (note the word SOMETIMES) sends spikes that damages the mainboard. Because when I test the voltages from the PC sensors as well as with a multimeter, they seem all right.
Here's a screenshot of the HW monitor page. Does the +3.3V seem a bit high?
I suspect the PSU because, previously when I had a Cooler Master 650W PSU, never did any problem crop up in one year. Recently when I switched to an Antec 550W PSU, the problems have started after a month or so. Can it be the PSU? Or a coincidence?
So is it really the PSU or the mainboard?
Please help.
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