Corsair AX1500i dying?

[quest for silence]

I'm dealing with a friend rig.

Specs in brief:

• CPU: Intel Core i7 5820k watercooled
• Mobo: ASUS X99 De Luxe
• Ram: 32gb G.Skill Ripjaws 4 2800Mhz
• GPU: Sli GTX 970 Galaxy HOF watercooled
• Drives: Samsung 850 EVO 250gb, 3 WD Blue 1tb, Blu Ray Asus BW16D1HT
• Audio: Creative ZX
• Ctrl: Nzxt Hue RGB
• Fan: 7 Noctua NF-F12 Ippc 2000 / Noctua NF-A14 Ippc 3000 (Akasa PWM splitter with SATA supply)
• Case: Phanteks Enthoo Primo

Some symptoms:

• Since about a week ago, when pushing the on/off case button, sometimes the rig starts, but more often it doesn't, almost always if you cut the AC.
• If you plug off the PSU cord (or toggle the rear switch), when you power on it again, the mobo lights come live but system/PSU don't boot.
• On the contrary, if you don't cut the AC at night, almost always it starts at first try in the morning.
• Tried different ATX 24 pin cables (original and modded) and issue persists.
• Longest period unable to boot about 24 hrs: then the rig was taken out of the case and rebuilt, unexpectedly it booted fine but then the issue comes again.

Any thoughts? Some short somewhere? Defective cabling? Rear switch gone bad? PWR_OK issue? 5VSB issue? Other issues? RMA the AX1500i? RMA the X99 De Luxe?

[-The_Mask-]

Don't you have a PSU lying around with four 8 pins PEG connectors for testing? A high quality 550W PSU can already be enough without overclocks for testing.

[quest for silence]

The connectors might be an issue: I will see which spare may fit, in case.

In the meantime, what's your opinion (if any)?

[-The_Mask-]

Looks like motherboard or power supply, but power supply is the easiest to replace, so.

[Jon Gerow]

Probably the motherboard. Wife's Asus board was doing the same thing. Of course, swapping the PSU is easier, so try that first.

[ridgid13579]

Did you try clear the CMOS? I've had issues like that until I cleared it, but then bye bye overclock settings!


I'm on my second 1500i, but the replacement is quite good. Jonny did you see what's wrong with the original one yet?

[quest for silence]

Tried a Platimax 1000: the rig didn't boot, so at the moment the mobo is likely (or more likely) the culprit.