need power supply help

travisbrummett · 10-19-2006, 05:38 AM

im ordering a motherboard with a 24 pin main connector will a 20 pin or 20+4 pin power supply work?

**ceewi1** · 10-19-2006, 08:00 AM

A 20+4 pin PSU will work fine. A 20 pin should work as well, but for maximum stability it is not recommended.

PC eye · 10-19-2006, 08:24 AM

Most new boards mandate a 24pin connection. That requires picking out a supply with either the 24pin or 20+4pin type main connector on it. On some of the AMD Socket 754 boards and Earlier Intel boards you could get away with a 20 to 34pin adapter. For AMD 939, 940, and AM2 along with the newest Core 2 Duo boards plan on using 24pins.

MagGoT_4_liFE · 10-20-2006, 06:17 PM

I'm almost positive a 20+4 pin draws no less power than a 24 pin. All a 20+4 Pin PSU means is that if you get a 20pin mobo you can detach the extra 4 pins to fit a 20 pin......(I think...)

PC eye · 10-21-2006, 03:21 AM

Quote:

Originally Posted by MagGoT_4_liFE

I'm almost positive a 20+4 pin draws no less power than a 24 pin. All a 20+4 Pin PSU means is that if you get a 20pin mobo you can detach the extra 4 pins to fit a 20 pin......(I think...)

There's no difference in drawing power there. The only difference is the type of connection. While some have only the 24pin connector the rest generally use the 20+4pin type to allow use on older boards as replacement supplies. The newer boards just happen to require the 24pin configuration for the difference in power distribution. The extra feeds now provides for newer features on the boards themselves.

**ceewi1** · 10-21-2006, 01:45 PM

Quote:

Originally Posted by MagGoT_4_liFE

I'm almost positive a 20+4 pin draws no less power than a 24 pin. All a 20+4 Pin PSU means is that if you get a 20pin mobo you can detach the extra 4 pins to fit a 20 pin......(I think...)

Correct, although you can generally overhang the extra 4 pins when using a 24-pin PSU on a 20-pin motherboard.

Quote:

Most new boards mandate a 24pin connection.

DFI are about the most stringent in this regard, most of the others just 'strongly recommend it'. There's also the issue of whether an older 20 pin, ATX 1.3 PSU with a heavier emphasis on the +5V rail will be sufficient for a powerful modern system.

As I said earlier, it will work in many cases, particularly for budget systems, but I would never recommend it.

PC eye · 10-22-2006, 01:03 AM

When first trying to start the Asus A8N SLI here the old Antec TP II 430w 20pin didn't cut it. Nothing not even any fan started. A quick run to a retail store for the TP II 480w with the 20+4pin saw the replacement board fire right up. I had somehow overlooked the now required 24pin power configuration on the 939 boards.

It was one of those days when....

!

10-19-2006, 05:38 AM	#1 (permalink)
travisbrummett New Member Join Date: Sep 2006 Posts: 20	need power supply help im ordering a motherboard with a 24 pin main connector will a 20 pin or 20+4 pin power supply work?

10-19-2006, 08:00 AM	#2 (permalink)
ceewi1 Moderator Join Date: Dec 2005 Location: Melbourne, Australia Age: 21 Posts: 5,275	A 20+4 pin PSU will work fine. A 20 pin should work as well, but for maximum stability it is not recommended. __________________ CPU: Core 2 Duo E6600 / MOBO: Gigabyte 965P-DS3 / GPU: Gigabyte HD4870 RAM: 2GB G.Skill F2-6400CL4D-2GBPK / HDD: 2TB Total HDD / PSU: Antec NeoPower 480W Cheap PSUs - 2% of system costs, responsible for 28% of system deaths As Sealed Stick was removed, lost or damaged, it shall be out of warranty validity. - The "Warranty void if removed" sticker on numerous CoolerMaster PSUs. Useful PSU Guides

10-20-2006, 06:17 PM	#4 (permalink)
MagGoT_4_liFE Silver Member Join Date: Jul 2006 Location: Boston, MA (6+1=7) WOOT Age: 18 Posts: 170	I'm almost positive a 20+4 pin draws no less power than a 24 pin. All a 20+4 Pin PSU means is that if you get a 20pin mobo you can detach the extra 4 pins to fit a 20 pin......(I think...) __________________ WC3TFT_4_liFE (Till WC4+SC2 :D) 98% of the teenage population will try, does or has tried smoking pot. If you're one of the 2% who hasn't, copy & paste this into your signature. 3.7216% of people are sexually attracted to midgets....If your one of the 3.7216%, copy & paste this into your signature. 100% of people are people, if you are in the 100% copy & paste this into your signature. (wtf?)

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10-19-2006, 08:24 AM	#3 (permalink)
PC eye Diamond Member Join Date: Apr 2006 Location: Inside a pc Posts: 19,717	Most new boards mandate a 24pin connection. That requires picking out a supply with either the 24pin or 20+4pin type main connector on it. On some of the AMD Socket 754 boards and Earlier Intel boards you could get away with a 20 to 34pin adapter. For AMD 939, 940, and AM2 along with the newest Core 2 Duo boards plan on using 24pins.

10-22-2006, 01:03 AM	#7 (permalink)
PC eye Diamond Member Join Date: Apr 2006 Location: Inside a pc Posts: 19,717	When first trying to start the Asus A8N SLI here the old Antec TP II 430w 20pin didn't cut it. Nothing not even any fan started. A quick run to a retail store for the TP II 480w with the 20+4pin saw the replacement board fire right up. I had somehow overlooked the now required 24pin power configuration on the 939 boards. It was one of those days when.... !