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Problem with XFX 750W PSU

post #1 of 4
Thread Starter 
Hey All. First-time poster, though I've been reading for the last several months. I purchased a XFX 750W PSU less than a month ago after reading about its excellent voltage stability, which, I was told, is important to have when one attempts to overclock components.

I got the PSU, installed it and ran it and all was great. However, after shutting my computer down, I was unable to POST during subsequent power-ups. I finally figured out that I had to shut off the PSU power switch AND wait for the mobo power indicator LED to shut off, then turn the PSU power on again before I could successfully POST during power up again. If I don't wait for the mobo LED to shut off, I won't be able to POST. I must stress that the system runs flawlessly otherwise, so I am confounded as to what the problem could be. I swapped the XFX PSU for a cheap Orion PSU I have laying around, and I have no issues.

I contacted XFX support, but so far their suggestions have not been helpful. I imaging they'll eventually request I exchange it. My questions to y'all are: any idea *** is going on with the PSU? and, is it really so bad if I just have to shut off the PSU every time I shut down my PC?

Thanks in advance.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 955 (3.2 GHz) ASUS M4A79XTD EVO HD 5770 4 GB (2x2) OCZ3OB1600LV2G 
Hard DriveOSPower
2 x 500 GB WD Caviar Blue (mirrored) Windows 7 Pro 64-bit XFX 750W Blk Ed. 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 955 (3.2 GHz) ASUS M4A79XTD EVO HD 5770 4 GB (2x2) OCZ3OB1600LV2G 
Hard DriveOSPower
2 x 500 GB WD Caviar Blue (mirrored) Windows 7 Pro 64-bit XFX 750W Blk Ed. 
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post #2 of 4
This sometimes happens to me and my friend. I believe it to be something happening on the AC the PSU doesn't like. You just need to cut the power to the PSU until it's fully drained, and it will reset. No biggy.
Ryzen 5 1600
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 5 1600 MSI B350 Gaming Plus Gigabyte GeForce GTX 1060 WINDFORCE2 OC 16GB (2x8GB) Corsair DDR4 Vengeance LED, PC4-24... 
Hard DriveHard DriveCoolingOS
256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
KeyboardPowerCaseMouse
Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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Ryzen 5 1600
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AMD Ryzen 5 1600 MSI B350 Gaming Plus Gigabyte GeForce GTX 1060 WINDFORCE2 OC 16GB (2x8GB) Corsair DDR4 Vengeance LED, PC4-24... 
Hard DriveHard DriveCoolingOS
256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
KeyboardPowerCaseMouse
Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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post #3 of 4
tbh the first thing I'd do is test your system with another PSU and see if it happens as well. If it does then there's no way around it, otherwise push for a replacement.

A power supply is the heart of your system, any fault should be rectified asap. Last thing you need is a cut out mid way that decides to take a component with it.

XFX is pretty decent with RMA's, though in the recent months have been a pain to deal with, hopefully you can break they cycle and everything goes smoothly. ^^
    
CPUMotherboardGraphicsRAM
Intel i7 4790k Asus Maximus Impact VII Z97 EVGA GTX 780 Classified Crucial Ballistix VLP 2x8GB 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 830 256GB Seagate 1TB SSHD Lite-On eNAU108-111 Thermalright Ultra Extreme Black 
OSMonitorKeyboardPower
Windows 8.1 Professional Asus PB278Q Das Keyboard Ultimate 4 Seasonic 760W Platinum 
CaseMouseMouse PadAudio
CaseLabs Nova X2M Logitech G602 Razer Scarab Asus Sonar Impact II + AudioEngine A2 
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CPUMotherboardGraphicsRAM
Intel i7 4790k Asus Maximus Impact VII Z97 EVGA GTX 780 Classified Crucial Ballistix VLP 2x8GB 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 830 256GB Seagate 1TB SSHD Lite-On eNAU108-111 Thermalright Ultra Extreme Black 
OSMonitorKeyboardPower
Windows 8.1 Professional Asus PB278Q Das Keyboard Ultimate 4 Seasonic 760W Platinum 
CaseMouseMouse PadAudio
CaseLabs Nova X2M Logitech G602 Razer Scarab Asus Sonar Impact II + AudioEngine A2 
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post #4 of 4
Like I said, I occasionally have the same issue with my Seasonic built Corsair, and my mate's Sirfa designed OCZ PSU. They just occasionally refuse to restart (it's like once a month or so, and random). They just need unplugging from AC until the standby power caps have drained, and it's all fine again. Really, I doubt your PSU has anything wrong with it.
Ryzen 5 1600
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 5 1600 MSI B350 Gaming Plus Gigabyte GeForce GTX 1060 WINDFORCE2 OC 16GB (2x8GB) Corsair DDR4 Vengeance LED, PC4-24... 
Hard DriveHard DriveCoolingOS
256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
KeyboardPowerCaseMouse
Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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Ryzen 5 1600
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Ryzen 5 1600 MSI B350 Gaming Plus Gigabyte GeForce GTX 1060 WINDFORCE2 OC 16GB (2x8GB) Corsair DDR4 Vengeance LED, PC4-24... 
Hard DriveHard DriveCoolingOS
256GB Samsung PM961 Polaris M.2 NVMe  1TB Toshiba DT01ACA100 3.5" HDD, SATA III  Cooler Master Hyper 212 Evo Windows 10 64 
KeyboardPowerCaseMouse
Unicomp Model M 650W EVGA SuperNOVA G1, 80PLUS Gold, Full Modular Kolink Luminosity Cooler Master Reaper Aluminium 
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