Power Supply Problem

Glock1337 · 07-20-2008, 06:10 PM

New computer build... put a 750w power supply (Rosewill RX750-D-B) in the comp, was working for a bit, then while trying to put windows on my hard drive, the computer powered down, and now when I try to turn it back on, the fans start up for a split second, but it never powers up.

Specs - P5N-D Asus motherboard, Q6600 Intel, 4G Corsair ram, EVGA 8800GT, 500G Western Digital HD, 2 Lite On optical drives, stock cpu coolers, 1 front case fan, 1 side fan, 2 back fans.

Did I blow the power supply? Any tips/suggestions as to why it happened, and how to prevent it next time? Is this power supply a bad apple, or is it generally a bad PSU altogether? (I got it for about 35% it's MSRP value, so I couldn't resist) I can't RMA it, but it is under warranty, should I send it in and have it repaired?

Any help is greatly appreciated, Thanks. Brian

**Fox** · 07-21-2008, 06:43 AM

I would check the seating of the ram, video card and processor first. The only time I've had this sort of thing happen to me was when I accidentally shorted out a motherboard. The board failed halfway into a linux install, but the power supply was actually alright.

I would try a different psu first, and if that doesn't work, start looking for scorch marks on the motherboard :/

dai · 07-21-2008, 09:19 AM

we don't recommend rosewill psu's

Glock1337 · 07-22-2008, 08:13 PM

I appreciate the help, the power supply turns out is ok, but probably toasted something else (motherboard probably). Will never buy rosewill psu's again, it turns out the problem was likely due to the low amperage of the 12v rails.... I guess a 750w sli certified and recomended for 8800 GTXs power supply ONLY has 20 amps.... my fault for not checking. a 8800GT requires 26 amps MINIMUM for the 12v rail....

Dumb me, now i need a new power supply with enough amperage... any suggestions? I also gotta find out what i burned, prolly motherboard but well see. I want a 700-800w power supply with atleast 26 amps on 12v rail, preferably lower priced and on newegg.

Ty for help!

Tumbleweed36 · 07-22-2008, 08:43 PM

Take a look at the Corsair 650 to 750 (if you can, get the 750 to future proof any near upgrades you might want down the road), it will run about anything you wish and still have power to spare. They seem to be on sale quite a few places now, so shop at NewEgg and some of the other popular online stores.

07-20-2008, 06:10 PM	#1 (permalink)
Glock1337 Registered User Join Date: Jul 2008 Posts: 2 OS: XP Pro	Power Supply Problem New computer build... put a 750w power supply (Rosewill RX750-D-B) in the comp, was working for a bit, then while trying to put windows on my hard drive, the computer powered down, and now when I try to turn it back on, the fans start up for a split second, but it never powers up. Specs - P5N-D Asus motherboard, Q6600 Intel, 4G Corsair ram, EVGA 8800GT, 500G Western Digital HD, 2 Lite On optical drives, stock cpu coolers, 1 front case fan, 1 side fan, 2 back fans. Did I blow the power supply? Any tips/suggestions as to why it happened, and how to prevent it next time? Is this power supply a bad apple, or is it generally a bad PSU altogether? (I got it for about 35% it's MSRP value, so I couldn't resist) I can't RMA it, but it is under warranty, should I send it in and have it repaired? Any help is greatly appreciated, Thanks. Brian

07-21-2008, 06:43 AM	#2 (permalink)
Fox Moderator, Microsoft Support Join Date: Sep 2002 Location: NJ Posts: 7,752 OS: XP Pro, CentOS My System	Re: Power Supply Problem I would check the seating of the ram, video card and processor first. The only time I've had this sort of thing happen to me was when I accidentally shorted out a motherboard. The board failed halfway into a linux install, but the power supply was actually alright. I would try a different psu first, and if that doesn't work, start looking for scorch marks on the motherboard :/ __________________ Antec Neo Power 500W, ABIT IP35-E, Intel E2180@2.66Ghz, Corsair XMS2 2x1GB DDR2-800, PNY 8800GT, 320GB Seagate * lazy college student alert *- If I've inadvertently ignored a thread, please Let me know about it Have I helped you solve your problem? Donate to Techsupportforums Klart Skepp!

07-21-2008, 09:19 AM	#3 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 42,012 OS: vista 32x ultimate retail	Re: Power Supply Problem we don't recommend rosewill psu's __________________

07-22-2008, 08:13 PM	#4 (permalink)
Glock1337 Registered User Join Date: Jul 2008 Posts: 2 OS: XP Pro	Re: Power Supply Problem I appreciate the help, the power supply turns out is ok, but probably toasted something else (motherboard probably). Will never buy rosewill psu's again, it turns out the problem was likely due to the low amperage of the 12v rails.... I guess a 750w sli certified and recomended for 8800 GTXs power supply ONLY has 20 amps.... my fault for not checking. a 8800GT requires 26 amps MINIMUM for the 12v rail.... Dumb me, now i need a new power supply with enough amperage... any suggestions? I also gotta find out what i burned, prolly motherboard but well see. I want a 700-800w power supply with atleast 26 amps on 12v rail, preferably lower priced and on newegg. Ty for help!

07-22-2008, 08:43 PM	#5 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 14,168 OS: XP Professional	Re: Power Supply Problem Take a look at the Corsair 650 to 750 (if you can, get the 750 to future proof any near upgrades you might want down the road), it will run about anything you wish and still have power to spare. They seem to be on sale quite a few places now, so shop at NewEgg and some of the other popular online stores. __________________ ----------