amd radeon r7 power consumption

V

volcano1

Member
ok i am kinda confused on what these graphics cards pull there are articles that list the r7 240 to use 30 watts and r7 250 to use 50 watts and other say the use over 100 watts when the website is max is 72 watts. so i went to newegg website to look at power consumption and here is the build i have

ASRock FM2A88X

AMD Athlon X4 740

G.SKILL Ripjaws X Series 4GB (2 x 2GB) x2 total 8gb

LG Black Blu-ray Burner SATA WH16NS40

XIGMATEK FCB (Fluid Circulative Bearing) x4

ASUS R7240-2GD3-L Radeon R7 240

or

ASUS R7250-1GD5 Radeon R7 250

so here was my estimate on power consumption

motherboard 125 watts
ram 5 watts x4 total 20 watts
fans 5 watts x4 total 20 watts
blu ray burner 60 watts
processor 65 watts
graphics 30 -50 watts (i dont play games just IT stuff figured i wont max it out)

so shouldn't the estimate be around 350 watts figured CORSAIR CXM series CX430M would work right. so why does it when i put all this in the caculator it gives me 783 WATTS!!! for both cards! i think the geforce gt 630 was supposed to be same power consumption as r7 240 but it gives me 328 watts.

i am also wondering what is the difference in power consumption in these cards. i dont see myself really needing the r7 250 since i dont play games, plus i am barely on budget for my build as it is but if it is not a big difference in power consumption i might consider going over a bit.
 
Last edited:
A CX430M will run that setup with ease. Even if you had both the 240 and 250 - even though that's incompatible :)
The wattage is completely off on motherboard and BD drive.
With:
AMD Athlon 750K, 4 dimms of DDR3, an R7 250X, an SSD+HDD, a BD R/W and 4 high performance fans you would only need a 358W PSU.
And these parts use more or equal power than the ones you are looking at.
The CX430M will be plenty.
 
Sounds like an error on the calculator. Also, the motherboard does not pull 125w by itself. You may notice 125w max under extreme load between both the CPU, 240 and the motherboard combined. I believe those fans pull around 0.2A so your power figures would be halved (12v*0.2A=2.4W). Optical drives also don't have that steep of a power requirement.

The CX430 would be fine with that build. I've used a CX430 with a 6800K with two Radeon 6570s (60w/ea) as a mining rig for a while without issues.

If you don't play games why don't you just get the APU that has the integrated GPU?
 
430M is fine. Also if you're not gaming just ditch the video card. You won't need it.
 
Yes you can use the integrated GPU if you don't play games to make your system even more frugal. :)
 
Jiniix said:
A CX430M will run that setup with ease. Even if you had both the 240 and 250 - even though that's incompatible :)
The wattage is completely off on motherboard and BD drive.
With:
AMD Athlon 750K, 4 dimms of DDR3, an R7 250X, an SSD+HDD, a BD R/W and 4 high performance fans you would only need a 358W PSU.
And these parts use more or equal power than the ones you are looking at.
The CX430M will be plenty.
Click to expand...


ok so i was close on the numbers, i dont think the burner pull 60 watts till it burns a blu ray if i remember right on the documentation. what do you mean it is incompatible?

spirit said:
Yes you can use the integrated GPU if you don't play games to make your system even more frugal. :)
Click to expand...

i could but having an actuall video card makes me feel better. figured if it would cost more to have integrated graphics figured might as well have the real thing. besides i am studying network administration and i could use another hdmi port for a second monitor anyways.
 
Last edited:
The X4 740 doesn't have onboard video, its disabled. Kinda stuck with getting a video card anyway. Unless you changed it out to a APU.
 
You must log in or register to reply here.
Back
Top