Which PSU to use...

linkin93 · 06-22-2009, 08:29 AM

I have two psu's:

a 400w one with 15 amps on 12v rail
a 300w one with 22.5 amps on 12v rail

Which should i use in my new pc? Neither have PCI-E power cables but i can get an adapter. I wont be SLI'ing or CF'ing anything and I wont be overclocking.
No LED's or cathodes in the case either.

I plan to be using a GeForce 9600gt or Radeon HD 4650
Should I just get a new PSU wiht PCI-E cables or will one of mine do fine?

kookooshortman55 · 06-22-2009, 08:36 AM

NVidia recommends around 26A on the 12V rail for it to run smoothly but according to this site

http://www.gpureview.com/show_cards....rd1=557&card2=

it only uses 8A. I would much rather just buy a new PSU and have peace of mind. You don't want to stress a PSU either, it's better to get too big of a one and not have it fully loaded all the time. You can probably find a nice one for $40.

Aastii · 06-22-2009, 10:26 AM

Quote:

Originally Posted by kookooshortman55

NVidia recommends around 26A on the 12V rail for it to run smoothly but according to this site

http://www.gpureview.com/show_cards....rd1=557&card2=

it only uses 8A. I would much rather just buy a new PSU and have peace of mind. You don't want to stress a PSU either, it's better to get too big of a one and not have it fully loaded all the time. You can probably find a nice one for $40.

you are right, but not $40 australian money, that is about $25-30 US money, so that would be a massive waste of time even at power that low

linkin93 · 06-22-2009, 11:59 AM

Looks like i'll use the 300w one. better amps and its new.
molex to PCI-E cables it is.
Thanks for the info on the 9600gt, but what about the radeon 4650?

**bomberboysk** · 06-22-2009, 07:59 PM

Quote:

Originally Posted by linkin93

Looks like i'll use the 300w one. better amps and its new.
molex to PCI-E cables it is.
Thanks for the info on the 9600gt, but what about the radeon 4650?

What manufacture is the power supply? Amps and wattage arent all that matter. Plus with that amerpage on the +12v rail, sounds more like rubbage specs that some chinese company decided to put on the label...

kookooshortman55 · 06-22-2009, 07:55 PM

http://www.gpureview.com/show_cards....rd1=580&card2=

This would probably be a safer bet to use on that 300W. Although I definitely won't perform up to the 9600GT. It would definitely be worth the money for a PSU upgrade to get a 9600GT imo.

StrangleHold · 06-23-2009, 01:01 AM

What kind of Power Supply is the 300W? I find it hard to believe that a 300W Supply could have 22/23 amps on the 12V rail.

linkin93 · 06-24-2009, 02:23 PM

It has 22.5 amps on 12v rail, got it for $30 au. Maybe so cheap because its micro atx. On the listing it said it was a rebadged seasonic brand? what does that mean?

Also, what do you think of this PSU?
http://cgi.ebay.com.au/New-Shaw-860W...3%3A3|294%3A50

I should be able to run a 9400gt with my trusty 300w psu according this in the ebay listing:

http://cgi.ebay.com.au/GALAXY-GEFORC...3%3A1|294%3A50

kookooshortman55 · 06-26-2009, 09:44 AM

You do not need an 860W PSU to power a 9400GT. Depending on the rest of your system, I wouldn't even upgrade the PSU if you're just going to throw a 9400GT in there.

bigfellla · 07-03-2009, 08:46 AM

Quote:

Originally Posted by StrangleHold

What kind of Power Supply is the 300W? I find it hard to believe that a 300W Supply could have 22/23 amps on the 12V rail.

agreed and....

Neither of those PSU's have sufficient amperage or quality to run that system. You need a new psu.

06-22-2009, 08:29 AM	#1 (permalink)
linkin93 Diamond Member Join Date: Jun 2009 Location: NSW, Australia Age: 16 Posts: 2,330	Which PSU to use... I have two psu's: a 400w one with 15 amps on 12v rail a 300w one with 22.5 amps on 12v rail Which should i use in my new pc? Neither have PCI-E power cables but i can get an adapter. I wont be SLI'ing or CF'ing anything and I wont be overclocking. No LED's or cathodes in the case either. I plan to be using a GeForce 9600gt or Radeon HD 4650 Should I just get a new PSU wiht PCI-E cables or will one of mine do fine?

06-22-2009, 08:36 AM	#2 (permalink)
kookooshortman55 Diamond Member Join Date: Jul 2008 Location: California/Arizona Age: 19 Posts: 1,546	NVidia recommends around 26A on the 12V rail for it to run smoothly but according to this site http://www.gpureview.com/show_cards....rd1=557&card2= it only uses 8A. I would much rather just buy a new PSU and have peace of mind. You don't want to stress a PSU either, it's better to get too big of a one and not have it fully loaded all the time. You can probably find a nice one for $40. __________________ CPU: AMD Athlon 64 x2 5200+ @ 2.6GHz GPU: Zotac 8800GT AMP! w/ Akimbo 740/1800/2000 PSU: 450W Corsair VX450 Monitor: Acer 22" X223W Memory: 4GB DDR2 PC2-5300 HDD: 320GB HDD Speakers: Logitech 5.1 X-540 3DMark06: 9521 3DMarks

06-22-2009, 07:55 PM	#6 (permalink)
kookooshortman55 Diamond Member Join Date: Jul 2008 Location: California/Arizona Age: 19 Posts: 1,546	http://www.gpureview.com/show_cards....rd1=580&card2= This would probably be a safer bet to use on that 300W. Although I definitely won't perform up to the 9600GT. It would definitely be worth the money for a PSU upgrade to get a 9600GT imo. __________________ CPU: AMD Athlon 64 x2 5200+ @ 2.6GHz GPU: Zotac 8800GT AMP! w/ Akimbo 740/1800/2000 PSU: 450W Corsair VX450 Monitor: Acer 22" X223W Memory: 4GB DDR2 PC2-5300 HDD: 320GB HDD Speakers: Logitech 5.1 X-540 3DMark06: 9521 3DMarks

06-23-2009, 01:01 AM	#7 (permalink)
StrangleHold VIP Member Join Date: Nov 2005 Posts: 11,174	What kind of Power Supply is the 300W? I find it hard to believe that a 300W Supply could have 22/23 amps on the 12V rail. __________________ NZXT Apollo S75QB 750W ZEROtherm FZ120 Phenom II 720BE (X4) 3.5GHZ. Gigabyte GA MA790X UD4P G Skill DDR2 1066 4GB. MSI GTS 250 Seagate 7200.12 500GB. Welcome to the show

06-24-2009, 02:23 PM	#8 (permalink)
linkin93 Diamond Member Join Date: Jun 2009 Location: NSW, Australia Age: 16 Posts: 2,330	It has 22.5 amps on 12v rail, got it for $30 au. Maybe so cheap because its micro atx. On the listing it said it was a rebadged seasonic brand? what does that mean? Also, what do you think of this PSU? http://cgi.ebay.com.au/New-Shaw-860W...3%3A3\|294%3A50 I should be able to run a 9400gt with my trusty 300w psu according this in the ebay listing: http://cgi.ebay.com.au/GALAXY-GEFORC...3%3A1\|294%3A50 Last edited by linkin93; 06-24-2009 at 03:09 PM.

06-22-2009, 11:59 AM	#4 (permalink)
linkin93 Diamond Member Join Date: Jun 2009 Location: NSW, Australia Age: 16 Posts: 2,330	Looks like i'll use the 300w one. better amps and its new. molex to PCI-E cables it is. Thanks for the info on the 9600gt, but what about the radeon 4650?

06-26-2009, 09:44 AM	#9 (permalink)
kookooshortman55 Diamond Member Join Date: Jul 2008 Location: California/Arizona Age: 19 Posts: 1,546	You do not need an 860W PSU to power a 9400GT. Depending on the rest of your system, I wouldn't even upgrade the PSU if you're just going to throw a 9400GT in there. __________________ CPU: AMD Athlon 64 x2 5200+ @ 2.6GHz GPU: Zotac 8800GT AMP! w/ Akimbo 740/1800/2000 PSU: 450W Corsair VX450 Monitor: Acer 22" X223W Memory: 4GB DDR2 PC2-5300 HDD: 320GB HDD Speakers: Logitech 5.1 X-540 3DMark06: 9521 3DMarks

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