Tom's Hardware: Topic System fans don't power down when using FSP Booster X3
Tom's Hardware > Forum > CPU & Components > Power Supplies, PC Cases & Case Mods > System fans don't power down when using FSP Booster X3
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My buddy just got an ABIT IP35 Pro Mobo and intel e4500 cpu.
He is using an Old 430 watt thermaltake psu and an FSP Booster x3 supplement psu for his video card (Geforce 7950)
When the system powers down, everything but the fans and the FSP unit power down. If we take the FSP off the system everything powers down fine...The FSP unit worked fine on a setup that included an OCZ 520w psu,8800gts,nforce 570 mobo, e6600 cpu.... Any thoughts on what may be causing this issue? Main psu not working right? FSP unit broken????
Thanks for looking 
I learned of another detail about this problem recently. It appears that that the fan in the psu still runs after the system is powered down and the psu is unplugged. It seems as if the X3 unit is feeding power back into the whole system.
Good times 
Yeah the X3 is crap tbh, have one myself.
It is SUPPOSED to be switched on/off by a +5v signal from the main PSU (this is why it needs a molex connector plugged into it).
However it seems it is able to power the main PSU via the Gfx card or the molex connector and ends up keeping itself switched on... I assume that all the rails on the main PSU are linked, and there is some 12v-5v drop down meaning it is still outputting +5v and switching on the X3?
I also found that with the X3, 3 8800GTXs in tri-sli, and a PC P&C 1kW as the main PSU, I got the "nvidia card is not recieving sufficient power" message, while I DON'T get that message without it.
It now sits on a shelf doing nothing
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