I'm writing to get a general sense from members of what my issue might be. I'm providing a chronology of events here to review. I built my computer in 2009 which is what you see in my details. The original graphics card was an EVGA GTX 590. I purchased a Silverstone 1200 Strider PSU for the original build. I know that is overkill but that is why I bought it thinking it would never be strained. The GTX 590 died in late summer 2016 making it about 7 years old and is the first time I have ever experienced a card failure. I purchased a used an EVGA GTX 780ti Classified off eBay to replace it. The 780 died in November 2017 and I figured it was probably just wear. The original owner told me he used the card at stock settings. I replaced it with a brand new EVGA GTX 980ti I found on eBay. The card was an RMA replacement the owner decided to sell and use the cash to get a stronger card. The 980 died about two weeks ago so it died after 3 months. It was still under warranty from EVGA so I obtained an RMA and EVGA is now sending me a GTX 1080ti as a replacement. When I lost the 980ti I tried some troubleshooting and found that my computer would boot only when the graphics card was not powered. As soon as I plugged in the power cables the computer would not turn on. If I waited a few minutes and tried again all I got was a brief flicker of lights and fans. Unplug the power cables and the system boots. So I'm wondering if the PSU is weak and killing the graphics card. I read several posts on various forums and an old PSU seems to come up as a possible cause. Your thoughts? I realize this is a general analysis without specifics but I do not have the equipment to test the PSU and so forth.