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Windows 7: PSU upgrade.

14 Jul 2010   #1
bilzmale

Win 7 Home Premium 64 bit
 
 
PSU upgrade.

Have rebuilt my PC today, new mobo, HDD, more RAM, powered sound card and Win 64 bit.

I picked up a s/hand PSU (Antec 650W) but it would not run. Gone back to old 500W PSU but it only has a 4 pin mobo connector instesd of 8.

Everything is now working but I need to upgrade the PSU. Is there any harm in running the 4 pin 12V for now? I will also add a new video card which may need power - how big a PSU should I buy? What brands are recommended.

I will update my system info.


My System SpecsSystem Spec
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14 Jul 2010   #2
Zepher

Windows 7 Ultimate 64bit
 
 

Corsair, Antec, Seasonic are good brands.
650 watt should do you fine, that is what I am running and I have a ton of shit in my case.
My System SpecsSystem Spec
14 Jul 2010   #3
MK2

 
 

Hi,

It's not advised to use a 4 pin on a 8 pin motherboard, you can find more information on this site about it: All about the various PC power supply cables and connectors

I myself use a Corsair PSU (HX850W), had good reviews and i'm very happy with it.

Here's a good site to calculate the wattage you need: Enermax Power Supply Calculator

Also good to know is that it's not only the wattage that's important but also how much amperage the 12v line has.

MK2
My System SpecsSystem Spec
.


14 Jul 2010   #4
Win7User512

Windows 7 x64 / Same
 
 

You should use the 8-Pin if possible.

I use a 550W OCZ PSU it has both 4 and 8 Pin. Naturally, I use the 8.
My System SpecsSystem Spec
14 Jul 2010   #5
Adrian

 

Quote   Quote: Originally Posted by bilzmale View Post
Have rebuilt my PC today, new mobo, HDD, more RAM, powered sound card and Win 64 bit.

I picked up a s/hand PSU (Antec 650W) but it would not run. Gone back to old 500W PSU but it only has a 4 pin mobo connector instesd of 8.

Everything is now working but I need to upgrade the PSU. Is there any harm in running the 4 pin 12V for now? I will also add a new video card which may need power - how big a PSU should I buy? What brands are recommended.

I will update my system info.
Recommend that you use 8 pin, parts of your mobo are not being provided power.
My System SpecsSystem Spec
14 Jul 2010   #6
kodi

Windows 8.1 Pro x64
 
 

Get yourself one of THESE
My System SpecsSystem Spec
14 Jul 2010   #7
Win7User512

Windows 7 x64 / Same
 
 

IMO, it would be safer to find a 650W PSU with the 8-Pin.
My System SpecsSystem Spec
14 Jul 2010   #8
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by bilzmale View Post
Have rebuilt my PC today, new mobo, HDD, more RAM, powered sound card and Win 64 bit.

I picked up a s/hand PSU (Antec 650W) but it would not run. Gone back to old 500W PSU but it only has a 4 pin mobo connector instesd of 8.

Everything is now working but I need to upgrade the PSU. Is there any harm in running the 4 pin 12V for now? I will also add a new video card which may need power - how big a PSU should I buy? What brands are recommended.

I will update my system info.
The last couple of motherboards I have purchased have 8 pin 12V sockets, but they came with plugs that blocked four of the pins. I believe that was to make iteasy to know how to insert the 4 pin plug. That suggests that most CPUs don't really need the extra current. (I haven't seen specs on that.)

If your system is running reliably with the 4 pin connector, I suggest that you not worry about it. I built up a system a few months ago that had an 8 pin socket; it runs perfectly reliably with a 4 pin plug. (Decent Antec PSU.)

Of course, on the newer systems, I removed the plug and used my 8 pin power connector. Because I could. (And I overclock.)
My System SpecsSystem Spec
14 Jul 2010   #9
DrWho

Windows XP-Pro-SP3, Windows 7
 
 

I'm also running the Antec Earthwatts 650 PSU and it's a real PowerHouse!
I'm running three SATA II hard drives, two DVD burners, 6 gig's of ram, AMD 5200+ X2, 64 cpu and a floppy drive and multi-card reader. OH, and 12 cooling fans.

So I'm curious what has happened to your 650 that it won't start. I'd almost have to suspect that if it wasn't hit by lightning, then it's not connected properly.

Just curious......

My System SpecsSystem Spec
14 Jul 2010   #10
smarteyeball

 
 

It's perfectly fine to run a 8-pin mobo off a 4-pin connection. As long as you aren't overclcking that is.


All PSU's have duds for varying reasons. Probably why it was 2nd hand...
My System SpecsSystem Spec
Reply

 PSU upgrade.




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