ATX 12v issues

( |-| |2 ][ $ · 15 Jul 2009 at 11:22

I'm helping my brother with a PC he's just built.

THe main isssue is with the 12v power for the motherboard. With the 6 pin or 6 plus two pin connected it just will not power up.

With the 4 pin connector it works fine. Can someone offer an explaination of how this should work and what the different configurations are for?

Motherboard: Gigabyte GA-MA770T-UD3P
Power supply: CIT 650UT
Graphics asus eah4670 1GB

I really appreciate any help anyone can offer.

pastymuncher · 15 Jul 2009 at 11:26

It sound's like you are trying to plug a 6 pin pci-e power plug into the motherboard. This is a bad idea. You should have a single 4 pin, a pair of 4 pin plugs that join together or a 8 pin plug.

That's a terrible cheap and nasty poor quality psu by the way. Never ever skimp on a psu as it's the single most important component of a pc.

Mattus · 15 Jul 2009 at 11:29

pastymuncher said:
Never ever skimp on a psu as it's the single most important component of a pc.

Very true

Get rid of it.

( |-| |2 ][ $ · 15 Jul 2009 at 11:33

It's not one of those ones that blows up and sets fire is it?

Is the PSU going to work or is it a case of it's that bad it's going to cause damage?

I presume the 6+2 pin connector is for some high powered graphics cards and is plugged directly onto them?

pastymuncher · 15 Jul 2009 at 11:42

( |-| |2 ][ $;14481261 said:
It's not one of those ones that blows up and sets fire is it?

Is the PSU going to work or is it a case of it's that bad it's going to cause damage?

I presume the 6+2 pin connector is for some high powered graphics cards and is plugged directly onto them?

They are of a extremely poor quality. Poor psu's never output their claimed wattage, are innefficent and when they fail are more likely to do it in a spectacular fashion, often taking other components with it.

Yes 6+2 pin connectors are for graphics cards only.

Depending on the cpu you are using a quality 400w psu would be more than enough for that rig.

( |-| |2 ][ $ · 15 Jul 2009 at 11:50

pastymuncher said:
They are of a extremely poor quality. Poor psu's never output their claimed wattage, are innefficent and when they fail are more likely to do it in a spectacular fashion, often taking other components with it.

Yes 6+2 pin connectors are for graphics cards only.

Depending on the cpu you are using a quality 400w psu would be more than enough for that rig.

PSU is an AMD phenom ii x4 810 2.6Ghz.

Thanks again for your advice. He's reading this now so is aware of his bad buying skills.

Ch3m1c4L · 15 Jul 2009 at 11:52

it may well be fine, but i wouldnt stick too much more in that pc. I had a q-tec 550w back in the day (when i was like 15 and on my first ever build) Did me proud for 2 years as it didnt blow up etc, but then i wa sonly drawing about 250-300 w using a 6600gt and a single core etc. Added a 7950 so put the load up to around 450 and it would always spike and kill one outpu ton the card (went through 3 of them before i remembered id had to put the q-tec back in because of the gayness that was hiper type-r 580w's).

So yea, dont put any high end componants on it. Get one of the corsair/be quiet/enermax/pc power and cooling/ocz/another brand that seems to be around £1 per 10 watts of power.

pctestcard.com · 15 Jul 2009 at 12:12

Invest more on the PSU, do not wait till the psu short your mainboard.

Hope this helps!
Bill

Mattus · 15 Jul 2009 at 12:14

Judging by the specs, it isn't as bad as some.. it's about equivalent to a good 500W. But you don't know how accurate the specs are, and generic PSUs as a rule shouldn't be used on higher-end systems.