Can a PSU kill the CPU?

Eloi · 01-18-2008, 03:46 AM

Hi!

I am trying to upgrade my computer to a 8800Gt video board, and that implies a new PSU.

After installing the new PSU, the computer doesn't start: no beeps, no cpu fan reducing speed, no video image, nothing, black screen and the disks and fans working.

The question is: can a change in the PSU toast the CPU? I would like to know it before buying a new one.

Thanks in advance

1 g0t 0wn3d · 01-18-2008, 03:58 AM

i would have to say it could have killed anything in your computer, however the cpu isthe hardest to bring down and if anthing died it would mostlikly be the ram, motherboard or video card

Tumbleweed36 · 01-18-2008, 04:40 AM

What Power supply did you install this time?

Eloi · 01-18-2008, 05:58 AM

The new psu is the LC Power LC6550GP 550W SilentGiant. The old one is a 250W. Old mobo msi-7301.

Tested the components (cpu, memory, video, psu) in another mobo (asus p5k something) and same results. Nothing.

Maybe the combination of this psu with the old mobo is the cause? Maybe some mobo can not deal with high power psu?

Thanks all. Again.

dai · 01-18-2008, 07:43 AM

it's underpowered for the new card and cheap low quality psu
you need one in the 650-750w range from a quality maker
preferably the 750w
Power Supply Information and Selection

**mattlock** · 01-18-2008, 07:53 AM

Is this your PC? http://support.packardbell.com/de/it...neymoon_imedia

If so, Via chipsets don't like the G92 based video cards (8800gt & gens 8800gts) and you'll probably need a bios update for the video card to make it a gen1 card (PCI-E 1.0) instead of a gen2 (PCI-E 2.0)

Other than that, I have to agree with Dai's assessment that your PSU is inadequate.

01-18-2008, 03:46 AM	#1 (permalink)
Eloi Registered User Join Date: Jan 2008 Posts: 2 OS: xp sp2	Can a PSU kill the CPU? Hi! I am trying to upgrade my computer to a 8800Gt video board, and that implies a new PSU. After installing the new PSU, the computer doesn't start: no beeps, no cpu fan reducing speed, no video image, nothing, black screen and the disks and fans working. The question is: can a change in the PSU toast the CPU? I would like to know it before buying a new one. Thanks in advance

01-18-2008, 03:58 AM	#2 (permalink)
1 g0t 0wn3d Hardware Team Join Date: Jan 2007 Location: Sedona, az Posts: 6,274 OS: Vista basic 32bit My System	Re: Can a PSU kill the CPU? i would have to say it could have killed anything in your computer, however the cpu isthe hardest to bring down and if anthing died it would mostlikly be the ram, motherboard or video card __________________ Bench Test \| PC Wizard \| System specs \| PSU info \| PSU calculator \| Memtest86+ \| Speedfan

01-18-2008, 04:40 AM	#3 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 14,102 OS: XP Professional	Re: Can a PSU kill the CPU? What Power supply did you install this time? __________________ ----------

01-18-2008, 05:58 AM	#4 (permalink)
Eloi Registered User Join Date: Jan 2008 Posts: 2 OS: xp sp2	Re: Can a PSU kill the CPU? The new psu is the LC Power LC6550GP 550W SilentGiant. The old one is a 250W. Old mobo msi-7301. Tested the components (cpu, memory, video, psu) in another mobo (asus p5k something) and same results. Nothing. Maybe the combination of this psu with the old mobo is the cause? Maybe some mobo can not deal with high power psu? Thanks all. Again.

01-18-2008, 07:43 AM	#5 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 41,845 OS: vista 32x ultimate retail	Re: Can a PSU kill the CPU? it's underpowered for the new card and cheap low quality psu you need one in the 650-750w range from a quality maker preferably the 750w Power Supply Information and Selection __________________

01-18-2008, 07:53 AM	#6 (permalink)
mattlock moderator hardware team Join Date: Dec 2005 Location: Ohio Posts: 3,818 OS: XP SP2, Ubuntu Gutsy Gibbon My System	Re: Can a PSU kill the CPU? Is this your PC? http://support.packardbell.com/de/it...neymoon_imedia If so, Via chipsets don't like the G92 based video cards (8800gt & gens 8800gts) and you'll probably need a bios update for the video card to make it a gen1 card (PCI-E 1.0) instead of a gen2 (PCI-E 2.0) Other than that, I have to agree with Dai's assessment that your PSU is inadequate. __________________ Matt Everest-Thermal Paste Instruction-Power Supply Info-Sensorview PSU Calculator-Speedfan-Bench Test Help TSF Fight Disease. It's Free!