Solve : Do I need a 24 pin PS on a new Asus A8N-SLI MB??

1.	Solve : Do I need a 24 pin PS on a new Asus A8N-SLI MB??
Answer» The new ASUS A8N-SLI Premium MB has a 24 pin connector on the MB. Will my 20 pin ATX12 PS work? Thanks for any input. I don't want to blow up the board on first power up.Get what it's made for - 24 pin. I doubt that old PSU has enough horsepower anyway.My PS is a year old Antec True Blue 480W. I've used it on other 24 pin MB's with np. Just curious if anyone knows about compatibility with the ASUS A8N-SLI Premium. ThanksDid you try it on this one yet?I got 2 DOA MBs from NewEgg. Fans would just spin up but wouldn't POST even with nothing but the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed. No beeps, no video. ASUS told me the boards were NG and to return for replacement. I'm wondering about the reality of that percentage of bad product from a reputable manufacturer and sounding out you pros about what else may be causing the problem. Have to ask if the empty 4 pins in the power molex could have anything to do with it. By the way, I tried a 24 pin PS on that board as well with the same symptoms. (after the fact) Thanks for the replyQuote I got 2 DOA MBs from NewEgg. Fans would just spin up but wouldn't POST even with nothing but the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed. No beeps, no video. ASUS told me the boards were NG and to return for replacement. I am ASSUMING you had a heatsink/fan attached?But of course. I don't think these boards will POST without seeing a current draw on the CPU-FAN plug. Well, that was the point. You said it didn't post!So, GX1-Man, I guess you don't know about the power plug and would rather play verbal tennis than address the initial question? Quote but wouldn't POST even with [highlight]nothing but [/highlight]the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed To be honest you were not clear in your post. That's why it took a while to get to the issue. I am not into verbal tennis. I haven't used that specific board so I can't give you a definite. Perhaps ASUS could? Be sure pin 1 on the 20 pin power connector aligns to pin 1 on the motherboard 24 pin power connector. Same applies to the ATX12V AUX connector, as long as its pin 1 on the four pin connector aligns with pin 1 on the six pin connector on the motherboard, they should work. I am concerned about two "bad" boards in a row. Did you have that same PSU on them? What about something like this: http://www.geeks.com/details.asp?invtid=ATX20-24&cat=CBLChrisVe...... I just had a look at your mobo manual .....and in Chapter 2 page 26 ...... it would appear that that board requires a 24 pin EATX connector....... http://support.asus.com/download/download.aspx?SLanguage=en-us&model=A8N-SLI%20Premium Before I sent the boards back , I would be trying a new psu with a EATX 24 pin connector ...... dl65 Thank you for posting back guys. When the inital board wouldn't POST, I did in fact run to the local computer store and buy a 24 pin PS figuring that was the problem but when hooked up made no difference at all so I returned it. I downloaded the manual before I bought the board to COMPARE it with others. It does say to use a 24 pin PS but doesn't say you can't use a 20Pin. Last month I built a box with an ABit board featuring a 24 pin plug and in the manual it says you can use a 20 pin PS and I did, but (as GX1-Man says) made sure the molex is shifted to the proper end. It seems that the general concensus and recommendation is that if you load it up with drives and expansion boards, you should split the load between the power rails by feeding the 4 extra pins. Yesterday I made a CompUSA run for one of those 20 to 24 pin adapters. For 6 bucks, I can't go wrong. Now I just have to wait for the new MB. I've got some experience building and upgrading desktop computers. My first was an IBM 8086 with 256K of RAM on-board, dual 5 1/4" floppy drives and a 20meg HD running DOS v1.02. The obsession has only gotten worse!! This has me scratching my head. Like you, I can't imagine the probability of a major player having this kind of failure rate. Thanks for the input.

Answer»

The new ASUS A8N-SLI Premium MB has a 24 pin connector on the MB. Will my 20 pin ATX12 PS work?
Thanks for any input. I don't want to blow up the board on first power up.Get what it's made for - 24 pin. I doubt that old PSU has enough horsepower anyway.My PS is a year old Antec True Blue 480W. I've used it on other 24 pin MB's with np. Just curious if anyone knows about compatibility with the ASUS A8N-SLI Premium.
ThanksDid you try it on this one yet?I got 2 DOA MBs from NewEgg. Fans would just spin up but wouldn't POST even with nothing but the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed. No beeps, no video. ASUS told me the boards were NG and to return for replacement.

I'm wondering about the reality of that percentage of bad product from a reputable manufacturer and sounding out you pros about what else may be causing the problem.

Have to ask if the empty 4 pins in the power molex could have anything to do with it.

By the way, I tried a 24 pin PS on that board as well with the same symptoms. (after the fact)
Thanks for the replyQuote

I got 2 DOA MBs from NewEgg. Fans would just spin up but wouldn't POST even with nothing but the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed. No beeps, no video. ASUS told me the boards were NG and to return for replacement.

I am ASSUMING you had a heatsink/fan attached?But of course. I don't think these boards will POST without seeing a current draw on the CPU-FAN plug. Well, that was the point. You said it didn't post!So, GX1-Man, I guess you don't know about the power plug and would rather play verbal tennis than address the initial question?

Quote

but wouldn't POST even with [highlight]nothing but [/highlight]the CPU (AMD 4000+ SanDiego), a 512 stick of Corsair ram and a 7800GTX vid card installed

To be honest you were not clear in your post. That's why it took a while to get to the issue. I am not into verbal tennis.

I haven't used that specific board so I can't give you a definite. Perhaps ASUS could? Be sure pin 1 on the 20 pin power connector aligns to pin 1 on the motherboard 24 pin power connector. Same applies to the ATX12V AUX connector, as long as its pin 1 on the four pin connector aligns with pin 1 on the six pin connector on the motherboard, they should work.

I am concerned about two "bad" boards in a row. Did you have that same PSU on them? What about something like this:

http://www.geeks.com/details.asp?invtid=ATX20-24&cat=CBLChrisVe...... I just had a look at your mobo manual .....and in Chapter 2 page 26 ...... it would appear that that board requires a 24 pin EATX connector.......

http://support.asus.com/download/download.aspx?SLanguage=en-us&model=A8N-SLI%20Premium

Before I sent the boards back , I would be trying a new psu with a EATX 24 pin connector ......

dl65 Thank you for posting back guys.

When the inital board wouldn't POST, I did in fact run to the local computer store and buy a 24 pin PS figuring that was the problem but when hooked up made no difference at all so I returned it.

I downloaded the manual before I bought the board to COMPARE it with others. It does say to use a 24 pin PS but doesn't say you can't use a 20Pin.

Last month I built a box with an ABit board featuring a 24 pin plug and in the manual it says you can use a 20 pin PS and I did, but (as GX1-Man says) made sure the molex is shifted to the proper end.

It seems that the general concensus and recommendation is that if you load it up with drives and expansion boards, you should split the load between the power rails by feeding the 4 extra pins.

Yesterday I made a CompUSA run for one of those 20 to 24 pin adapters. For 6 bucks, I can't go wrong. Now I just have to wait for the new MB.

I've got some experience building and upgrading desktop computers. My first was an IBM 8086 with 256K of RAM on-board, dual 5 1/4" floppy drives and a 20meg HD running DOS v1.02. The obsession has only gotten worse!!
This has me scratching my head. Like you, I can't imagine the probability of a major player having this kind of failure rate.

Thanks for the input.

Solve : Do I need a 24 pin PS on a new Asus A8N-SLI MB??

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