New power supply with older motherboard

[dualsmp]

I recently took apart an old Antec supply to clean out the dust only to find a bad capicitor, so I'm looking to find a new 80 plus power supply to work with my old Abit BP6 motherboard.

However the newer power supplies do not have a -5 volt connection so how will this affect the motherboard? Will the motherboard simply not work at all (?), or will just the ISA slots not work? I'm thinking I could get by without ISA slots if that's the only thing that doesn't work.

Also is there a hack to enable a -5v connection?

 

[BlahBlahYouToo]

24 -> 20 pin adapter?
it's a question, not an answer because i don't know myself.

 

[dualsmp]

Originally posted by: BlahBlahYouToo
24 -> 20 pin adapter?
it's a question, not an answer because i don't know myself.

Most all the new power supplies have 24 pin connector that should separate to 20 pin. I've replaced the power supply on a Abit IC7 with a Corsair VX450 and it works perfectly by separating the 24 pin-->20 pin. However the IC7 doesn't have any ISA slots so -5 volt isn't a problem.

 

[Zap]

I'm not sure you'd find any 80+ units with -5v.

As for purchasing a new power supply with -5v, you can try this wildly popular model for $29 after rebate with free shipping. It seems reasonably solid, just that it is an older design as evidenced by the presence of -5v, the 65% efficiency and only having 18A on the +12v.

For some reason people keep buying this to power modern systems.

 

[Beanie46]

You're probably going to have to find a very much older design power supply to replace your dead/dying Antec....your system is very 3.3/5V dependent, and new power supplies are now skewed towards the +12V side.

I'd suggest looking around for something like a Silverstone ST400 or the Enermax EG301P-VB 24P 300W or something along those lines. Whatever you choose probably will not have active or passive PFC circuitry, so will have a voltage selector switch on the rear. Suggest looking for a 20-pin ATX connector power supply with a +3.3/5V combined rating of at least 180W.

 

[Beanie46]

Originally posted by: Zap
you can try this wildly popular model for $29 after rebate with free shipping.

For some reason people keep buying this to power modern systems.

You answered your own question already.....$29 with free shipping AR. Just about sums up what some want in the most neglected piece of a computer....a dirt cheap hunk of anything that'll power their computer. Guess that's why CoolMax still sells their junk, too.

 

[dualsmp]

I found a supply that is 80 plus and has -5 volt (says -5v included). Looks like a server supply though.
http://www.fsp-group.com.tw/en...nid=2&fid=141&proid=94

I have a kill-a-watt and the BP6 draws only 50watts idle, and 100% load it's drawing around 105watts. So 250 watts is actually plenty.

Going to do a bit more digging though and see if I can find a standard size ATX supply. I'll report back.

 

[BlahBlahYouToo]

if you want, i have this psu available for sale.
Text

 

[HOOfan 1]

Originally posted by: BlahBlahYouToo
if you want, i have this psu available for sale.
Text

I figured that was the one you had when you were talking about it in the other thread.

You are being very wise getting rid of that and not powering your new system with it....

 

[BlahBlahYouToo]

Originally posted by: HOOfan 1

Originally posted by: BlahBlahYouToo
if you want, i have this psu available for sale.
Text

I figured that was the one you had when you were talking about it in the other thread.

You are being very wise getting rid of that and not powering your new system with it....

haha, it's not a bad psu though. i hooked it up to a e7400/8800gs system @ stock speeds with the 20-24 pin adapter AND a molex to 6pin pci-e adapter and it works!

 

[Modelworks]

Originally posted by: dualsmp
I recently took apart an old Antec supply to clean out the dust only to find a bad capicitor, so I'm looking to find a new 80 plus power supply to work with my old Abit BP6 motherboard.

However the newer power supplies do not have a -5 volt connection so how will this affect the motherboard? Will the motherboard simply not work at all (?), or will just the ISA slots not work? I'm thinking I could get by without ISA slots if that's the only thing that doesn't work.

Also is there a hack to enable a -5v connection?

There is a way to generate the -5v but it wouldn't be worth the effort or cost.
You do not need the -5v anyway 99% of the time. It was used in VERY old circuits, think 1995 era.

 

[dualsmp]

Originally posted by: Modelworks

Originally posted by: dualsmp
I recently took apart an old Antec supply to clean out the dust only to find a bad capicitor, so I'm looking to find a new 80 plus power supply to work with my old Abit BP6 motherboard.

However the newer power supplies do not have a -5 volt connection so how will this affect the motherboard? Will the motherboard simply not work at all (?), or will just the ISA slots not work? I'm thinking I could get by without ISA slots if that's the only thing that doesn't work.

Also is there a hack to enable a -5v connection?

There is a way to generate the -5v but it wouldn't be worth the effort or cost.
You do not need the -5v anyway 99% of the time. It was used in VERY old circuits, think 1995 era.

Ok thanks. I might try to hook up my Corsair VX450 and see if it works. I suppose it should be safe to do. If it works I'll probably just buy one of the modern 80plus power supplies around 250 or 300 watts without worrying about -5v.

 

[SparkyJJO]

You could replace the bad caps in the Antec.