Can I use 20 pin PSU in 24 pin motherboard?

MikeTyson · Dec 15, 2009

Basically I've just got a PSU of 550W, better than my 480W for the W rating obviously

It's a cheaper generic model but it has come from an OEM SLi system with exactly the same setup as mine other than the motherboard...

The power supply only has 20 pins for connecting to the motherboard, but my motherboard has a 24 pin socket...

Will it be stable if I just plug in this 20 pin power supply to my 24 pin socket?

Thanks

[Ion] · Dec 15, 2009

Yep, it'll work, I ran a 24-pin mobo with a 20-pin PSU for a while

MikeTyson · Dec 15, 2009

Hmm I've been reading around a bit and some people say that it could be unstable due to having to run everything from 1 rail, cos the extra 4 pins were for splitting the rails?

It's all a bit confusing... but considering this PSU has been in a system identical to this other than the motherboard which had a 20 pin, I'm trying to figure out if there could be a problem still, hmmm...

Disparia · Dec 15, 2009

Yes, most likely. There are adapters that will take 20 pin to 24pin, if stability issues occur.

But why switch out your Hiper 480w, that's presumable working, for a generic 550w?

MikeTyson · Dec 15, 2009

Because when I overclock a bit, the system won't boot

This is only after installing the second video card

Prior to having SLi, and only running 1x 7950GT I could clock up to 3.0GHz and be stable

Same story with my memory, if I clock it up to the 1000MHz I had it at before the SLi, the system won't boot

So I assume it's all down to not enough juice

Disparia · Dec 15, 2009

Specs for the Hiper:

+3.3V, 28a.
+5V, 32a.
+12V1, 18a.
+12V2, 16a.
-12V, .8a.
+5Vsb, 2.5a.
3.3+5V Combined, 240w.
12V1+12V2 Combined, 350w.
Total Power 480w.

Could you post the model and/or specs for the 550w? Generics aren't known for supplying a lot of stable 12v.

MikeTyson · Dec 15, 2009

Hmm...

I've put it back to 3.0GHz and 1000MHz but I left the voltages on Auto this time around...

And it's booted with the Hiper 480W

This is strange cos it wasn't doing it earlier

erocker · Dec 15, 2009

Please do not make more than 1 thread on the same subject. Thanks.

http://forums.techpowerup.com/showthread.php?t=110589

System Name	Swag
Processor	Intel Xeon E3110 4GHz
Motherboard	GIGABYTE GA-G31M-ES2L
Cooling	Scythe Infinity I Push-Pull w/ AS5
Memory	2x2GB Transcend 800MHz DDR2 @ 890MHz 1.9v
Video Card(s)	Palit nVIDIA GTX460 1GB 800/1600/2000
Storage	Crucial M4 64GB
Display(s)	LG Flatron M1917TM 1280x1024 @ 60Hz
Audio Device(s)	Realtek HD Audio
Power Supply	OCZ StealthXStream 2 600W
Software	Windows 7 Professional 64-bit

System Name	Niedersachsen / Ribe / Minsk
Processor	i3 3240 / i7-3520M / 4x Opteron 6376 @ 2.86GHz
Motherboard	BIOSTAR H61M / HP Q77 / Supermicro H8QG7
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Memory	1x8GB / 2x4GB / 4x4GB
Video Card(s)	GTX260 / Intel HD 4000 / nVidia GT310
Storage	80GB Intel SSD / 256GB Intel SSD / 2x 60GB SSD (RAID1)
Display(s)	Dell 3007 + HP 2245w / 12.1" 1366x768 / None
Case	Antec NSK3480 / HP / Supermicro 1U
Audio Device(s)	Onboard
Power Supply	Enermax 500W / HP 130W / Supermicro Gold 1400W
Keyboard	IBM Model M
Software	Windows 7 (Niedersachsen/Ribe) / Linux Mint 17.2 (Minsk)

System Name	Swag
Processor	Intel Xeon E3110 4GHz
Motherboard	GIGABYTE GA-G31M-ES2L
Cooling	Scythe Infinity I Push-Pull w/ AS5
Memory	2x2GB Transcend 800MHz DDR2 @ 890MHz 1.9v
Video Card(s)	Palit nVIDIA GTX460 1GB 800/1600/2000
Storage	Crucial M4 64GB
Display(s)	LG Flatron M1917TM 1280x1024 @ 60Hz
Audio Device(s)	Realtek HD Audio
Power Supply	OCZ StealthXStream 2 600W
Software	Windows 7 Professional 64-bit

Processor	Intel i5-6600
Motherboard	ASRock H170M-ITX
Cooling	Cooler Master Geminii S524
Memory	G.Skill DDR4-2133 16GB (8GB x 2)
Video Card(s)	Gigabyte R9-380X 4GB
Storage	Samsung 950 EVO 250GB (mSATA)
Display(s)	LG 29UM69G-B 2560x1080 IPS
Case	Lian Li PC-Q25
Audio Device(s)	Realtek ALC892
Power Supply	Seasonic SS-460FL2
Mouse	Logitech G700s
Keyboard	Logitech G110
Software	Windows 10 Pro

System Name	Swag
Processor	Intel Xeon E3110 4GHz
Motherboard	GIGABYTE GA-G31M-ES2L
Cooling	Scythe Infinity I Push-Pull w/ AS5
Memory	2x2GB Transcend 800MHz DDR2 @ 890MHz 1.9v
Video Card(s)	Palit nVIDIA GTX460 1GB 800/1600/2000
Storage	Crucial M4 64GB
Display(s)	LG Flatron M1917TM 1280x1024 @ 60Hz
Audio Device(s)	Realtek HD Audio
Power Supply	OCZ StealthXStream 2 600W
Software	Windows 7 Professional 64-bit

Can I use 20 pin PSU in 24 pin motherboard?

MikeTyson

[Ion]

WCG Team Assistant

MikeTyson

Disparia

MikeTyson

Disparia

MikeTyson

erocker

*

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