For around 2 years I ran my PC in its current location in its current configuration without issue with a 500W PSU that is still functioning in another PC.
In April of last year I bought an HD7950 video card and replaced the PSU with a 750W Thermaltake. I'm running an Intel quad core and the HD7950 and nothing else unusual. http://www.microcenter.com/product/383021/SMART_Series_750_Watt_ATX_Modular_Power_Supply
In August, the PC started shutting off at random times, no error just power down. It was not getting hot and I could start it right back up. The event log just said there was an unexpected shutdown such as loss of power. The shutdowns increased in frequency and eventually the PC would not start. I sent the power supply back and received a replacement and it ran fine for about the same amount of time (4-5 months). Then I had another unexpected shutdown with nothing strange in the event log. This has happened two nights in a row.
I have been told maybe I have dirty power on that circuit (then why did the 500W run fine for years? Why have the two 750W PSUs run fine for 4 months before failing?). Nothing else on that circuit has had an issue.
I have been told that maybe the PSU should be a gold- or silver-rated one instead of the bronze-rated unit I have. Again, it runs fine for 4-5 months. Could I just have gotten 2 bad units in a row?
I have been told maybe I have failing capacitors on the motherboard.
I feel like there should be an answer to this but I'm not sure how to figure out what my actual problem is.
In April of last year I bought an HD7950 video card and replaced the PSU with a 750W Thermaltake. I'm running an Intel quad core and the HD7950 and nothing else unusual. http://www.microcenter.com/product/383021/SMART_Series_750_Watt_ATX_Modular_Power_Supply
In August, the PC started shutting off at random times, no error just power down. It was not getting hot and I could start it right back up. The event log just said there was an unexpected shutdown such as loss of power. The shutdowns increased in frequency and eventually the PC would not start. I sent the power supply back and received a replacement and it ran fine for about the same amount of time (4-5 months). Then I had another unexpected shutdown with nothing strange in the event log. This has happened two nights in a row.
I have been told maybe I have dirty power on that circuit (then why did the 500W run fine for years? Why have the two 750W PSUs run fine for 4 months before failing?). Nothing else on that circuit has had an issue.
I have been told that maybe the PSU should be a gold- or silver-rated one instead of the bronze-rated unit I have. Again, it runs fine for 4-5 months. Could I just have gotten 2 bad units in a row?
I have been told maybe I have failing capacitors on the motherboard.
I feel like there should be an answer to this but I'm not sure how to figure out what my actual problem is.