will this power supply be enough??

DefectedSOul · Jul 10, 2014

Motherboard - GIGABYTE MA785GMT-UD2H
Processor - AMD Phenom II X4 965 Black edition (3.4ghz)
RAM - 2x 4gb(8gb) DDR3 PNY 1333mhz
Power Supply - 520watt
Screen - LG 23 inch LED monitor
i got a AMD r9 270x and a 520watt DYNEX power supply i have 5 cooling fans on my case and 3 hard drives

My PSU: http://www.dynexproducts.com/products/computer-accessories/DX-520WPS.html

will it be okay to run the card under load and all that?
Thank you

LucoTF · Jul 10, 2014

DefectedSOul :

I wouldn't. Are you in the USA?

DefectedSOul · Jul 10, 2014

LucoTF :

DefectedSOul :

I wouldn't. Are you in the USA?

yeah thats where i live

LucoTF · Jul 10, 2014

DefectedSOul :

You have a 125w processor and a 180w graphics card - that's 26amps on the 12v rail right there. Plus all hard drives, fans and optical drives also use the 12v for power. I don't think your dynex is up to the task. Have a look at the sticker on the side of your power supply and see what the rating is under '+12v'

Here's a pretty good supply that would meet your needs
http://www.newegg.com/Product/Product.aspx?Item=N82E16817182295&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=

DefectedSOul · Jul 10, 2014

LucoTF :

its only 18.0A but it also says it has 2 +12VDC ones 18Amps and the other is 16Amps

Also on the box it says it has 6+2 pin PCIe connectors for high end GPUs could it possibly mean that it has its own rail for the GPU?? maybe?

stokes1790 · Jul 10, 2014

DefectedSOul :

No, the 8 pin connector is just to plug in the external power connections on the gpu, the gpu is still going through the 12v rail.

You basically want all your parts to take up <90% of the 12v rails amps. Wattage is not really the best statistic to work off of. As you can see the dynex rates at 520w, but only 18A on 12v rail, whereas the Rosewill linked above is rated for 450w but has 35A on the 12v rail, nearly double the real world power delivery.

LucoTF · Jul 10, 2014

stokes1790 :

DefectedSOul :

No, the 8 pin connector is just to plug in the external power connections on the gpu, the gpu is still going through the 12v rail.

You basically want all your parts to take up <90% of the 12v rails amps. Wattage is not really the best statistic to work off of. As you can see the dynex rates at 520w, but only 18A on 12v rail, whereas the Rosewill linked above is rated for 450w but has 35A on the 12v rail, nearly double the real world power delivery.

Actually even that rosewill is a bit light for a 270x, I was looking at this but I think it's wrong:

http://forum-en.msi.com/faq/article/printer/power-requirements-for-graphics-cards

For another $10 you can hulk smash it with 53amps:

http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9

OP the 270x needs two connectors, not one

DefectedSOul · Jul 10, 2014

stokes1790 :

DefectedSOul :

No, the 8 pin connector is just to plug in the external power connections on the gpu, the gpu is still going through the 12v rail.

You basically want all your parts to take up <90% of the 12v rails amps. Wattage is not really the best statistic to work off of. As you can see the dynex rates at 520w, but only 18A on 12v rail, whereas the Rosewill linked above is rated for 450w but has 35A on the 12v rail, nearly double the real world power delivery.

alright heres a picture of the label on my PSU http://i4.photobucket.com/albums/y102/iameatingjam/Untitled-1.png

do you thing there is anything a can do to get it to temporally work till i have enough money to get a better PSU?

Also the 450 just says 1 +12VDC on my PSU its got +12V1DC and +12V2DC

DefectedSOul · Jul 10, 2014

LucoTF :

stokes1790 :

Actually even that rosewill is a bit light for a 270x, I was looking at this but I think it's wrong:

http://forum-en.msi.com/faq/article/printer/power-requirements-for-graphics-cards

For another $10 you can hulk smash it with 53amps:

http://pcpartpicker.com/part/xfx-power-supply-p1650snlb9

OP the 270x needs two connectors, not one

Thanks

but i will look on to a new one soon tho and ill probably go with that one just was hoping mine could handle it for a while. i just dont have the money at the moment for a new PSU and find it odd that my power supply says its got 2 12VDC rails

LucoTF · Jul 10, 2014

DefectedSOul :

You take the combined rating of the 2, so you have 34 amps max, or 408w. Except you don't -

http://www.dynexproducts.com/cms/documents/Manuals/DX-400WPS-DX-520WPS_13-0313%20_WEB_V5_ENG_Final_lr.pdf

This says max 420w across the system, and stuff like the motherboard (which runs on a different rail) can easily take up 40+ watts under load. It's all just way too close for comfort. Even if you got an adapter cable for the second power pin you'd be pushing that psu to the limit (and possibly beyond).

(edited to fix link)

LucoTF · Jul 10, 2014

DefectedSOul :

multiple rails is quite normal, as is a 'max combined' rating across the +12v rails (you can expect to lose at least 1amp per rail for the combined rating)

DefectedSOul · Jul 10, 2014

LucoTF :

Okay so it is possible that it can handle it but only thing is it might be pushing the limit of the PSU?

LucoTF · Jul 10, 2014

DefectedSOul :

Let's do the numbers:

125w - CPU
180w - GPU
40w - mobo
6w - both RAM
25w - three hard drives
10w - 5 cooling fans

that's 386w and if you use a dvd drive that's another 5-20 watts (depending of if it's in use or not).

That's over 90% of your 420w rating, so while it's possible that your PSU can run it it's also possible that your PSU goes pop the first time you load up a game. That is really close, dude

DefectedSOul · Jul 10, 2014

LucoTF :

Alright fair enough Thanks alot man. i might look at a few computer stores in town and see if they have a decent on that will run what i need and hopefully i wont have to order one and have to wait for the shipping. ill see what i can do.
Also i do have another power supply out of an older computer do you think i could use that PSU to power the card alone or also have have it power my other hard drives to take load off of my PSU till i get a new PSU?? or just have it power my hard drives or something to take load off of my PSU??

LucoTF · Jul 10, 2014

DefectedSOul :

LucoTF :

Alright fair enough Thanks alot man. i might look at a few computer stores in town and see if they have a decent on that will run what i need and hopefully i wont have to order one and have to wait for the shipping. ill see what i can do.
Also i do have another power supply out of an older computer do you think i could use that PSU to power the card alone or also have have it power my other hard drives to take load off of my PSU till i get a new PSU?? or just have it power my hard drives or something to take load off of my PSU??

It's my understanding that it's possible to run dual PSUs but I've never tried it and wouldn't know where to start. Google may help you there, sorry.

DefectedSOul · Jul 10, 2014

LucoTF :

DefectedSOul :

It's my understanding that it's possible to run dual PSUs but I've never tried it and wouldn't know where to start. Google may help you there, sorry.

okay thanks again man. ive used another PSU to run an extra few hard drives on another computer just didnt know if it would work on a GPU. thanks alot for your help

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