Asus P5B do I need 24 pin and 4 pin 12 volt ?

[phoneguy]

Hey started new build tonight and I guess I didn't look at my installation guide closely enough.The psu I have does not have both 24 pin and 4 pin connectors,it has the 24 pin that you can separate into 20 and 4 pin.Do I have to have both 24 and 4 pin connectors?


Asus p5b motherboard
intel E4500 cpu

 

[heymrdj]

You could just hold the connector to the board and see it. But from my research it's a 24 pin board, so yes use the 20 pin, the 4 pin addon, and the 4 pin P4 connector.

 

[jonnyGURU]

Originally posted by: phoneguy
The psu I have does not have both 24 pin and 4 pin connectors, it has the 24 pin that you can separate into 20 and 4 pin.

Then you have a 24-pin. That's called a 20+4 and it's meant to fit in motherboards with both 20-pin and 24-pin power connectors. The +4 cannot be used in place of the 4-pin (+12V) that powers the CPU.

But if the PSU is new enough to have a 20+4, it should also have a 4-pin (+12V) for the CPU power.

People please, if you have power supply questions it's only going to help to list what kind of power supply you have. Otherwise, all we can do is guess what you're talking about.

 

[phoneguy]

Thanks for your replies guys,sorry about not listing psu model.It is an Ultra xfinity 600w I was given.After looking at psu tier chart I think I will just get a better one anyway since all of my other parts are new.

 

[jonnyGURU]

Wow! There's an official tier chart? :roll:

Pardon my sarcasm.

Your PSU has a 4-pin. Find the 8-pin and split it in half.

There may be no reason to buy another PSU if you already have that one. It's not THAT BAD of a PSU in that it does have all of the necessary protections in place (OVP, OCP, SSP, etc.) List the specs of your WHOLE BUILD and not just the CPU and let's figure it out.

The graphics card (or cards) is actually the big dynamic on figuring out what PSU is right for you. Not the CPU.

 

[phoneguy]

Hey Jonny thanks so much for your reply,sorry for coming and going but we had a blizzard here in Ohio and I've been clearing snow from driveways all day.Anyway the psu was given to me,supposedly unused.no manual.I did as you said and split the 8 pin.I triple checked! my other connections After holding my breath and doing nothing else then went to try the system.Everything was connected,psu turned off.When I connected the power cord to psu it arced where it plugs into the psu.After holding my breath and waiting a few seconds I looked at the motherboard and the led was lit.When I turn on the psu nothing happens and the led goes out after about ten seconds.I rechecked everything and retried,this time with the cord plugged into the psu and plugged it into the wall,this time there was a pretty severe arc so I unplugged it and gave up for now.Do you think my motherboard was damaged? Any reply will be greatly appreciated,Thanks..

asus p5b intel e4500cpu kingston ram wd 250 gig sata hd asus sata dvd drive
xfx 8600gt 512 mb

 

[phoneguy]

Hey just found a guide to test psu without psu tester.I shorted pins 13 & 14 and the psu fans spun up,very slowly.Using a digital multimeter there was no output voltages on any of the leads and the fans quit spinning after about 1 minute.

 

[jonnyGURU]

Are you doing this with the power supply with no other power connectors hooked up to any other devices?

In other words, the power supply is "free" from any load, you jumped the green and black, kept it jumpered and tested the voltages?

 

[phoneguy]

At first yes,nothing.Then I went back to clearing snow,several hours later I tested each component separately and they worked?I then put it back together and it posted,should I be worried about the psu?I have no idea where the short or whatever the problem was came from.Thanks for the answers and sorry about coming and going but it's been nuts around here with weather!

 

[jonnyGURU]

Hmm... sounds like you're doing something wrong here.

If the PSU is free from ANY components and you short the green and black wires, you should get fans and voltages on all leads.

It concerns me that you didn't, but if it works when you hook up other components then I have to assume that maybe the green to black connection you made wasn't a good one.

That PSU doesn't require you to load up a rail if all you're going to do is check for voltages.

 

[phoneguy]

Thats what I'm concerned about.When I tried it the first time I did it 10 or 15 times checking my connections each time and having someone hold the clip to ensure good contact.I used a Fluke digital multimeter and got absolutely no reading.I just wonder if this psu is just flaky and should I just run to Microcenter & get a better one.

 

[SparkyJJO]

in my experience some psus won't run properly without a load... I have an xfinity 600w here actually I'm selling for a friend that I know works fine, maybe I should test it the same way and see what happens....

 

[MarcVenice]

oops wrong thread -_-

 

[phoneguy]

Hey guys,went and got new psu,everything fired right up,bios sees all drives.Went to install windows,not working! Guess I'll check out the other forums now to try to figure that out,thanks so very much for your replies.I guess this is sometimes harder than it seems huh.

 

[jonnyGURU]

Originally posted by: SparkyJJO
in my experience some psus won't run properly without a load... I have an xfinity 600w here actually I'm selling for a friend that I know works fine, maybe I should test it the same way and see what happens....

I've "jumped" plenty of X-Finity 600W's without a load. Like I said, it doesn't need one if you're just checking voltages. Sounds like phoneguy's friend gave him a dead PSU.

 

[SparkyJJO]

I agree with you.