PSU Question

Windows Sniper · 03 Mar 2011

Here is one for the Community.

I Replaced an Old Psu last night with a New one.

Old Psu has all Needed Connections as does the new one.

Old =
24 pin M/B
8 Pin CPU
Molex *8
Sata *6
2* PCI-E

New
24+4pin M/B
4+4 pin CPU
Molex * 7
Sata * 8
4* PCI-E

So All in all a simple transfer?

The motherboard has 3 Power inputs,
24 Pin
8 Pin
and a 4 Pin Molex Input.

The Problem

Swapping the PSU's over no problem, Disconnect all from Old then put the new one in.

The New one however makes the MB shut off after 2 seconds. After an hour of tinkering i found the problem,

The 8 Pin Input to the MB makes it shut off, if i remove the 8 Pin it runs and doesnt crash (Had it on for an Hour Straight)

The Question

Is it safe to Run the Pc WITHOUT the 8 Pin Connection?
Or do i need to return the PSU to the Supplier?

I will upload pics when i can get them.

Anything helpful would be appreciated.

stormy13 · 03 Mar 2011

This the motherboard listed in your specs or another one?

Windows Sniper · 03 Mar 2011

I dont get your Question, Yes this is all about one Motherboard

stormy13 · 03 Mar 2011

I'm looking at the manual for it right now and it doesn't have a 4 pin molex connector on it. It does have a 4 pin (square) power connector along the left side near the keyboard and mouse ports.

For that you split the 2x4 connector and only use one; ideally it shouldn't matter which you use but who knows. If you haven't, try it with each.

P.S. What is the make and model of the new power supply?

Windows Sniper · 03 Mar 2011

Oh no sorry Completly Different i thought you meant the specs listed above ^^

The motherboard in Question is a FOXCONN but i cannot find the serial for it

ignatzatsonic · 03 Mar 2011

Windows Sniper said:

New
24+4pin M/B
4+4 pin CPU
Molex * 7
Sata * 8
4* PCI-E

The motherboard has 3 Power inputs,
24 Pin
8 Pin
and a 4 Pin Molex Input.

I assume these connectors are keyed in such a way that if you use all 8, you can only insert the plug in one way, not reversed?

If I understand correctly, by "4+4" you mean a PSU connector that has 8 pins, but you can use either of 2 groups of 4 separately?

If so, have you tried just using just 4 of the 8, into either the top 4 on the mobo 8 pin receptacle, or maybe the bottom 4?

My motherboard has an 8 pin receptacle but I have only a 2x2 connector from the PSU. It turns out that the 2x2 was keyed so that it would fit into the top 4 of the 8 pin, but not into the bottom 4. It worked fine when put into the top 4.

You have a molex connector onto the motherboard? Don't think I have seen that.

Windows Sniper · 03 Mar 2011

Ig In answer to your Questions

1) Yes they are Keyed in a certain way
2)Yes it has 2*4 which can be used seperatly or Together for an 8pin
3)i have tried 3 ways with the 4 pin on their own so... Left, Right and Center the same problem happens.
4)And yes it has a Molex 4 pin just above the PCI slots Lemmie link the photo's in to show you.

stormy13 · 03 Mar 2011

The proper model number for the new motherboard would help.

You have a molex connector onto the motherboard? Don't think I have seen that.

Some SLI and Crossfire capable motherboards have them for providing extra power to the PCI-E slots when two cards are used. It isn't needed in a single card setup. I used to have an old A8N-SLI board that has it,

Windows Sniper · 03 Mar 2011

That Makes sense since this PC is using x-fire. Im waiting for the Images to upload now.

Any more thoughts on this? the only difference in power is the old PSU is 800 and the New one is 850.

And i am Not doing a Transatlantic Call as the Supply office is in America or Taiwan

OH and i Know the Computer is a Dust Factory, its why the Old PSU died, So im Cleaning that out as i go...\/\/

Windows Sniper · 03 Mar 2011