New motherboard help needed

enfield_freddy

Cycrow wrote: »

no that wouldn't stop the fans from powering up (especially if the fans are connected directly to the psu). the 4/8 pin give additional power, it gets it main power through the 20+4. You can run motherboards without having to connect those at all, althou it may effect stability.

i have an atom ion motherboard with a 4pin connector, and it runs fine using a pico psu connected just to the 20pin

And even if it was a problem, it would still attempt to power up, which will cause the fans to flick

ok , I stand corrected ,

Fightsback

poppellerant wrote: »

I would advise against using an adaptor to convert the current 4 pin cable to an 8 pin one. Believe it or not, this is a fire hazard due to currents. You're asking a cable to provide twice the amount of power, which is likely to be more than what it was designed for.
.

I think he will proabaly be fine using a 4>8 pin adaptor, it is only a 65 w CPU, more of a worry if he's using a 95-125w. Besides it's the cheapest way to find out of it is the 8 pin plug causing the problem as there is still the possibility it's a duff refurbished board, static bang (didn't earth themselves and touched tracks) or have blown something due to error. If it is the 4>8 pin issue they can review their options later.

Those 4 pin/8 pin plugs are for the CPU voltage regulator alone.

poppellerant

Fightsback wrote: »

I think he will proabaly be fine using a 4>8 pin adaptor, it is only a 65 w CPU, more of a worry if he's using a 95-125w. Besides it's the cheapest way to find out of it is the 8 pin plug causing the problem as there is still the possibility it's a duff refurbished board, static bang (didn't earth themselves and touched tracks) or have blown something due to error. If it is the 4>8 pin issue they can review their options later.

Those 4 pin/8 pin plugs are for the CPU voltage regulator alone.

I see what you're saying and for short term use it would probably be fine. But I wouldn't like it on my conscious if i told somebody that such an adaptor is safe for long term use, when I and others know they aren't.

Fightsback

poppellerant wrote: »

I see what you're saying and for short term use it would probably be fine. But I wouldn't like it on my conscious if i told somebody that such an adaptor is safe for long term use, when I and others know they aren't.

Those 4 pin connectors are current limited by design and spec so no possibility of a fire:

http://www.formfactors.org/developer/specs/atx12v_psdg_2_2_public_br2.pdf

See section 1.2.3

Vejovis

Thank you once again everyone.

I couldn't find an adaptor in Maplin, so thanks for that link. I think I will buy one just to see if we get any movement at all. And then if we do I'll look at buying a new PSU. I just don't want to spend £50 on a PSU if it's the motherboard that's goosed.

Cycrow

tbh, its probably a good idea to replace the PSU anyways, many computers tend to come with really budget PSU's (yours sounds like a budget make), and they are a more important part than people realise.

So even if it is the motherboard thats a problem, its possible that the psu may cause problems in the future.

enfield_freddy

however , and the OP has,nt stated otherwise , the OP is simply replacing a motherboard , and using the same CPU


why would a bigger , better PSU be needed?


when boards started appearing with usb sockets for mice/keyboards instead of the old PS2 , we did,nt all go out and buy new mice/keyboards , we picked little usb to ps2 adaptors up from ebay (china)


if the Psu has proved ok in the past (same cpu / graphics) it just needs an adaptor




I have here 3 c CIT cases for a job , all new from the wholesalers yesterday , all with nice 500w PSUs , non have a 8 pin plug.

Fightsback

Vejovis wrote: »

Thank you once again everyone.

I couldn't find an adaptor in Maplin, so thanks for that link. I think I will buy one just to see if we get any movement at all. And then if we do I'll look at buying a new PSU. I just don't want to spend £50 on a PSU if it's the motherboard that's goosed.

Just out of curiosity why did you need to replace the motherboard in the first place and how much did you pay for the refurb board ?

Cycrow

enfield_freddy wrote: »

however , and the OP has,nt stated otherwise , the OP is simply replacing a motherboard , and using the same CPU


why would a bigger , better PSU be needed?


when boards started appearing with usb sockets for mice/keyboards instead of the old PS2 , we did,nt all go out and buy new mice/keyboards , we picked little usb to ps2 adaptors up from ebay (china)


if the Psu has proved ok in the past (same cpu / graphics) it just needs an adaptor




I have here 3 c CIT cases for a job , all new from the wholesalers yesterday , all with nice 500w PSUs , non have a 8 pin plug.

because cheap psus often case problems, sometimes these can be more subtle, with just some instability problems. Its also common for these to eventually fail, and when they do, they can take the whole pc with them.

The lack of proper connectors is not the issue, its more down to the build quality of the psu in general.

I also didn't say the psu needed to be bigger, just better. a 400/500W decent PSU would do the job

Vejovis

Fightsback wrote: »

Just out of curiosity why did you need to replace the motherboard in the first place and how much did you pay for the refurb board ?

Sorry I didn't get back on yesterday.

Today I decided that rather than buy the adaptor, I took the board with processor and fan attached to a computer store and the chap there tested it. He got the fans to start, but they stopped almost as soon as they started. So he said that the motherboard was goosed.

That said, we decided to just put the computer back together with the old board, and guess what! That isn't working now, it's doing the same thing as the computer guy said the new board was doing. It's starting up the fans and then stopping.

Personally I'm close to 'accidentally' dropping it in the wheelie bin

In answer to the question above. There was no good reason (IMO) to change the motherboard. My son got new case at Christmas, and it had several fans to keep it cool (and some fancy lights), and the old motherboard didn't have anywhere to plug them in. And we paid $77.99 plus postage and import taxes, so it came to about £75 all in.