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Will 300w handle Evga 8400?

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May 5, 2012 9:24:16 PM

EVGA GeForce 8400 GS 1 GB DDR3 PCI Express 2.0 DVI/HDMI/VGA Graphics Card

Just bought this card, but only have a 300w PSU at the moment. Was wondering if it's safe to run with the 300w. I have a pretty old PC at the moment, t5062 Desktop PC, but upgraded with windows 7 and 2gb ram.

More about : 300w handle evga 8400

a c 153 U Graphics card
May 5, 2012 10:07:27 PM

Whats the make and model of the PSU?
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May 6, 2012 12:20:30 AM

It will probably run but it's a bad idea to under power your pc. It won't be just your card at risk but everything else as well FYI
a c 179 U Graphics card
May 6, 2012 2:10:14 AM

I just went through this very question in another thread. The 8400 GS requires 71 watts under load according to tom's charts. Other charts on the web say 21 watts under load.

Lets go with the 71w that would equal 6amps on the 12v rail so let say his CPU draws 95w which is probley way over but the 71w + 95w = 166w which would be 14 amp on the 12 rail.

So if your 12v rail in your PSU is 14amps or higher then you will be able to use it. If you need to check your PSU open up your case look for the sticker on the PSU you will see numbers that look like this.

3.3v = 14a + 5v = 13a + 12v = 14a You want the one with 12v + the amps. some PSUs have two 12v rails and it will look like this 12vA + 12vB do not confuse the( " -" 12v) one.

If I have confused you just let me know but it should work for you with that card with out a problem and Good luck to you.
May 6, 2012 2:42:40 AM

DM186 said:
I just went through this very question in another thread. The 8400 GS requires 71 watts under load according to tom's charts. Other charts on the web say 21 watts under load.

Lets go with the 71w that would equal 6amps on the 12v rail so let say his CPU draws 95w which is probley way over but the 71w + 95w = 166w which would be 14 amp on the 12 rail.

So if your 12v rail in your PSU is 14amps or higher then you will be able to use it. If you need to check your PSU open up your case look for the sticker on the PSU you will see numbers that look like this.

3.3v = 14a + 5v = 13a + 12v = 14a You want the one with 12v + the amps. some PSUs have two 12v rails and it will look like this 12vA + 12vB do not confuse the( " -" 12v) one.

If I have confused you just let me know but it should work for you with that card with out a problem and Good luck to you.


says my 12v is 15amp
a c 179 U Graphics card
May 6, 2012 11:43:18 PM

I was trying to find your PC, are you sure it is a t5062 or is it a t5026 eMachine? I was trying to find your CPU and this PC doen't have a PCIe slot or a AGP slot. In other words it cannot be upgraded except the hard drive and OS.

If you can upgrade then 15amp is over the 14amp so you are good to go if you can upgrade and that isn't your PC number. I will link you to what I found.

http://reviews.cnet.com/desktops/emachines-t5026/1707-3...
May 7, 2012 12:17:18 AM

liebejr said:
EVGA GeForce 8400 GS 1 GB DDR3 PCI Express 2.0 DVI/HDMI/VGA Graphics Card

Just bought this card, but only have a 300w PSU at the moment. Was wondering if it's safe to run with the 300w. I have a pretty old PC at the moment, t5062 Desktop PC, but upgraded with windows 7 and 2gb ram.



It is not safe, upgrade your power supply, period
May 7, 2012 6:25:12 PM

DM186 said:
I was trying to find your PC, are you sure it is a t5062 or is it a t5026 eMachine? I was trying to find your CPU and this PC doen't have a PCIe slot or a AGP slot. In other words it cannot be upgraded except the hard drive and OS.

If you can upgrade then 15amp is over the 14amp so you are good to go if you can upgrade and that isn't your PC number. I will link you to what I found.

http://reviews.cnet.com/desktops/emachines-t5026/1707-3...


http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This is my PC

Anyone with a for sure answer?
Because some say it won't work, some say it will, but not a good idea, and some say it will be fine.
May 7, 2012 7:00:51 PM

liebejr said:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

This is my PC

Anyone with a for sure answer?
Because some say it won't work, some say it will, but not a good idea, and some say it will be fine.


MY PSU says:
OUTPUT +12v/15a (max) +5vSB/2.0a (max)
MAX POWER +5v/20a (max) -12v/0.8a (max)
300W +3.3v/18a (max)

+5v & +3.3V OUTPUT CANNOT EXCEED 160w
+5v &


So will this work?

Best solution

a c 179 U Graphics card
May 8, 2012 1:20:42 AM
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liebejr said:
MY PSU says:
OUTPUT +12v/15a (max) +5vSB/2.0a (max)
MAX POWER +5v/20a (max) -12v/0.8a (max)
300W +3.3v/18a (max)

+5v & +3.3V OUTPUT CANNOT EXCEED 160w
+5v &


So will this work?


For that card your 300w PSU will work with out any problem here is link to a site that will show you how many watts your card will use.

Go to the 3rd chart and go almost to the bottom there you will see your card 8400 GS and on load or max load it only uses 15.30watts.

So that would be only 1.3 amps on the 12v rail and even if what that states 160w that would mean the 12v rail would be 14amps.

So you take a way 1.3amps and you have 12.7 amps left, so yes it will run without any problem at all. The numbers don't lie. I can give you more links to prove my point if you want me to.

The other people on here are concerned that if you have a generic PSU it could burn out on you and that would apply to a high end card which you don't have.

Yours is one step above integrated GPU. But if you want buy one then make sure you get a Corsair, Antec, Seasonic, and XFX brands. But I know without a doubt your PSU will run that card.

http://ht4u.net/reviews/2011/zotac_geforce_gt_520_1gb_d...
May 8, 2012 5:46:37 PM

Best answer selected by liebejr.
December 25, 2013 10:30:50 AM

Helltech said:
Whats the make and model of the PSU?


i bought a KDM 320 watts,original was the reg 25 watts dell had in it,i also noticed in bios where you set up the video size it just gave me options for a 64mb/128mb/256mb,showed no 512mbi tried everything ,tried plugging the onboard 64mb and had the geforce 8400 plugged into the pci express used the disks that came with,so when that didnt work went and got an and saved drivers at nvidia site,again plugged in cable and got an fail error on site and on install disks,claims it would work on vista 32 bit,wasnt till i started reading on box it says needed at least a 350 +wats psu,and says it needed 18 ampson the +12 volt rail will have to google more to retry no even sure if my pci express i a 2.0 versin just says pci-e 1x16,im just gonna repackage andlose a bit of money and resell on ebay and go with ne of the raedon cards a 256 one,might even just get a plain pci 256 card,these pcs were not made for gaming,the highest psu i could find was on ebay,except at newegg who wanted more then what this pc is worth:p  but also when i would unplug from the motherboard video card and plug into the new card it would go black,so yeah is possible it could be the psu?
!