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Motherboard power consumption (Watts)

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June 12, 2010 12:09:03 AM

Hello, I have an Asus P7P55D and I was wondering if motherboards in general consume energy on their own. I have a 750 Watt PSU but I am not sure if its enough for my build. Can someone tell me how i would figure this out?

TY for help
a b V Motherboard
June 12, 2010 12:19:59 AM

rotmammoth said:
Hello, I have an Asus P7P55D and I was wondering if motherboards in general consume energy on their own. I have a 750 Watt PSU but I am not sure if its enough for my build. Can someone tell me how i would figure this out?

TY for help

Well, you could list all of your components including the make and model of the " 750 watt PSU ", or you could punch them into a psu calculator
http://extreme.outervision.com/psucalculatorlite.jsp
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June 12, 2010 7:27:40 AM

This is my build:

XFX Radeon HD 4890 Video Card - 1024MB DDR5, PCI Express 2.0 x16, CrossFireX Ready, (Dual Link) Dual DVI, HDTV

Asus P7P55D Pro Motherboard - Intel P55, Socket LGA1156, Core i5

Corsair Dual Channel 4096MB PC12800 DDR3 1600MHz Memory (2 x 2048MB)

Intel Core i5 750 BX80605I5750 Processor - 2.66GHz, LGA 1156, 8MB L3 Cache, Quad-Core, Lynnfield, Retail

Western Digital WD5000AAKS Caviar Blue Hard Drive - 500GB, 7200rpm, 16MB, SATA-300, OEM

Ultra LSP750 750-Watt Power Supply - ATX, SATA-Ready, SLI-Ready, 135mm Fan, Lifetime Warranty

Thanks for the help, for some reason I couldn't use the calculator.
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a b V Motherboard
June 12, 2010 11:25:51 AM

750 watts is way more power than those specs would require.
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June 12, 2010 10:33:02 PM

Oh really? howd you calculate that and would it make a big difference if i overclocked my cpu to like 4.0ghz? Thanks for the help delluser1.
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a b V Motherboard
June 12, 2010 11:48:22 PM

Yup.
By having a basic knowledge of the power consumption of the components, no it wouldn't make a difference if you overclocked.
Don't understand why you couldn't use the calculator, try this link
http://extreme.outervision.com/index.jsp
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June 13, 2010 1:39:45 AM

Hm...maybe I'm calculating wrong but im getting 850 Watts recommended (100% wattage consumption with 30% aging thing).
I put:
i5 at 4.2 mhz/1.4 volts
Radeon 4890
1 dvd-rw/dvd+rw
1 pci-e x16 and 2 pci-e x 1 (Im not using these slots but i put it anyways)
4 usb devices (not sure wha this means)
5 120 fans

Can you tell me what I put in wrong and thanks for the help.

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a b V Motherboard
June 13, 2010 9:33:23 AM

rotmammoth said:
Hm...maybe I'm calculating wrong but im getting 850 Watts recommended (100% wattage consumption with 30% aging thing).
I put:
i5 at 4.2 mhz/1.4 volts
Radeon 4890
1 dvd-rw/dvd+rw
1 pci-e x16 and 2 pci-e x 1 (Im not using these slots but i put it anyways)
4 usb devices (not sure wha this means)
5 120 fans

Can you tell me what I put in wrong and thanks for the help.

Sounds like it.
Not really sure.
Leave the reccomended settings alone ( 90% ), and remove the extra pci-e cards that you didn't include in your original specs.
4 USB devices don't use much power, so not a big deal.
I generally use 25% Cap aging, there are far to many variables for the calculator to be accurate there.

Here's a screenshot of a system I've been playing with
http://i41.tinypic.com/rbfvdf.png

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a b Ĉ ASUS
a c 156 V Motherboard
June 13, 2010 1:13:06 PM

Motherboard power consumption won't be more than 40 - 50 watts not counting memory.

Years ago, when I built my second C2 system (G'byte P35-DS3P, Q6600, 2 GB of DDR2 RAM), I was curious where all the power was going, so I borrowed a lab calibrated clamp-on ammeter from work and measured everything I could.

I measured about 4 amps at 5 volts (a larger, full featured motherboard should pull a little more), 1 amp at 12 volts, and 6 amps at 3.3 volts for the RAM. That's 52 watts including the memory.

OC'ing the CPU (1.2625 volts stock to 1.425 volts OC'd) increased the CPU power consumption a bit less than 25%.

Unless you have a basket full of hard drives, any PSU that will adequately power your CPU and GPU will have no problem powering the motherboard.
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June 13, 2010 6:39:06 PM

Alright thanks guys. Helped a lot.
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!