Just bought a Seasonic S12

[SleepWalkerX]

I hooked up the psu properly, but here's what happens when I turn on the unit:

It starts to receive power and starts to spin up, but then it looks like it cuts off power to the computer (the fans stop spinning, but then start up again in a few seconds). Plugging in a fan to the motherboard's sysfan connector doesn't work. I have to use a molex to sysfan adapter that receives power straight from the psu. Is there anything I should do to troubleshoot this further or is there something wrong with my psu?

The rest of that system includes a Core 2 Duo E6300, Gigabyte DS3 (P965 chipset), and a gig of memory. We pretty much disconnected everything else (the hard drive and dvd burner). What's up?

 

[Nathelion]

Is this a completely new system or have all the components been known to actually work?

 

[oynaz]

My first bet would be a faulty motherboard or faulty RAM.

 

[yuppiejr]

I have two DS3 mainboards, this is not a PSU issue - it's the DS3 reacting to an invalid setting in the BIOS or incompatible hardware. I see this behavior all the time if I push an overclock farther than the board likes.

Use the CLEAR CMOS jumper and try again. If you have another set of DDR RAM lying around (something known to work at 1.8v) try it out in the board instead, or try using a single stick of the RAM you do have at a time.

 

[SleepWalkerX]

we were kinda thinking the motherboard might be at fault. first i'll rma the psu just in case and if it still happens i'll get a new mobo. thanks!

 

[rise]

Originally posted by: SleepWalkerX
we were kinda thinking the motherboard might be at fault. first i'll rma the psu just in case and if it still happens i'll get a new mobo. thanks!

why would you do that?

what size is that psu anyway? maybe i'll buy it

 

[Howard]

You sure it's not the motherboard's fan control?

Is the fan a 4-pin?

 

[LOUISSSSS]

99% sure the psu is fine..

50% sure its the mb problem

 

[bryanW1995]

I thought that too so I bought a new mobo. Come to find out, the new mobo wouldn't work with the psu...whoops...

 

[Conky]

This is a known issue with the DS3... the cpu fan doesn't fully power up for a few seconds after the board starts.

It's really not a big issue but it bothered me enough that, like you, I simply bypassed the onboard cpu/fan connector and connected it directly to the PSU. Problem solved. This DS3 overclocks too well for me to get rid of it for such a minor annoyance.