Use GPU-Z to attain wattage?

Soup · Feb 8, 2012, 03:45 AM

Given that Watts = Amps x Volts, couldn't I use the info provided by GPU-Z to obtain my GPU's actual wattage?
The only problem I see is that I don't know which V or A to use... see below.

The only reasonable wattage's I got came from:

12v * VDDC Current In = ~209W
VDDC * VDDC Current = ~161W
MVDDC * VDDC Current = ~239W

Any thoughts?

P.S. I hope this is in the correct section. Preemptive sorry if it is not.

AthlonX2 · Feb 8, 2012, 04:57 AM

i believe it's VDDC*VDDC Current

W1zzard · Feb 8, 2012, 06:37 AM

that calculation would be correct and give your the gpu only power consumption of the board (excluding memory and other consumers on the board). there is no way to calculate board power for the whole card

silkstone · Feb 8, 2012, 07:34 AM

Quote:

Originally Posted by W1zzard

that calculation would be correct and give your the gpu only power consumption of the board (excluding memory and other consumers on the board). there is no way to calculate board power for the whole card

How much additional power would the components on the board use, percentage wise? 20% +/- 5%?

W1zzard · Feb 8, 2012, 07:48 AM

screenshot above shows 149 A @ 1.08 V GPU = 160.92 W for the GPU only.

Assuming the user was running Furmark, I measured 270W board power, so 90 W missing. Obviously this can change depending on application and power state.

Soup · Feb 8, 2012, 03:21 PM

I guess I'll just break down and buy a Kill-a-Watt. Thanks for the input guys/gals? Very useful.

BTW I was running DiabloMiner

AthlonX2 · Feb 8, 2012, 03:24 PM

If your looking to measure GPU power dont buy a kill A watt. zalman makes some very nice vga meters and cpu meters

http://www.zalman.com/ENG/product/Pr...ad.asp?idx=418

http://www.zalman.com/ENG/product/Pr...ad.asp?idx=417

Arctucas · Feb 8, 2012, 04:08 PM

Or use a clamp meter around the +12VDC wires between the PSU and the card while checking the voltage with another voltmeter, then apply Ohm's Law.

W1zzard · Feb 8, 2012, 04:15 PM

Quote:

Originally Posted by Arctucas

Or use a clamp meter around the +12VDC wires between the PSU and the card while checking the voltage with another voltmeter, then apply Ohm's Law.

missing up to 75W power through the pcie slot

Arctucas · Feb 8, 2012, 04:18 PM

Quote:

Originally Posted by W1zzard

missing up to 75W power through the pcie slot

Is that 75W used first?

Is it used always, or does it vary?

W1zzard · Feb 8, 2012, 04:23 PM

Quote:

Originally Posted by Arctucas

Is that 75W used first?

Is it used always, or does it vary?

varies. you must measure it

Arctucas · Feb 8, 2012, 04:50 PM

Quote:

Originally Posted by W1zzard

varies. you must measure it

I see... then I would get a PCI-E riser extension cable, determine which conductors supply +12VDC, and use the clamp meter.

Feb 8, 2012, 03:45 AM	#1
Soup Join Date: Nov 2011 Location: 'merica Posts: 147 (0.27/day) Thanks: 39 Thanked 71 Times in 30 Posts System Specs	Use GPU-Z to attain wattage? Given that *Watts = Amps x Volts, couldn't I use the info provided by GPU-Z to obtain my GPU's actual wattage? The only problem I see is that I don't know which V or A to use... see below. The only reasonable wattage's I got came from: 12v VDDC Current In = ~209W VDDC * VDDC Current = ~161W MVDDC * VDDC Current = ~239W Any thoughts? P.S. I hope this is in the correct section. Preemptive sorry if it is not.

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CRT/LCD Model:	Dell U3011 30", 2560x1600 + 19" 1280x1024
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Feb 8, 2012, 04:57 AM	#2
AthlonX2 Better Than You Join Date: Sep 2006 Location: Toledo,Ohio Posts: 5,449 (2.25/day) Thanks: 729 Thanked 1,572 Times in 994 Posts System Specs	i believe it's VDDC*VDDC Current

Feb 8, 2012, 06:37 AM	#3
W1zzard Benevolent Dictator Join Date: May 2004 Location: Stuttgart, Germany Posts: 13,758 (4.18/day) Thanks: 184 Thanked 10,208 Times in 3,157 Posts System Specs	that calculation would be correct and give your the gpu only power consumption of the board (excluding memory and other consumers on the board). there is no way to calculate board power for the whole card

Feb 8, 2012, 07:48 AM	#5
W1zzard Benevolent Dictator Join Date: May 2004 Location: Stuttgart, Germany Posts: 13,758 (4.18/day) Thanks: 184 Thanked 10,208 Times in 3,157 Posts System Specs	screenshot above shows 149 A @ 1.08 V GPU = 160.92 W for the GPU only. Assuming the user was running Furmark, I measured 270W board power, so 90 W missing. Obviously this can change depending on application and power state.

Feb 8, 2012, 03:21 PM	#6
Soup Join Date: Nov 2011 Location: 'merica Posts: 147 (0.27/day) Thanks: 39 Thanked 71 Times in 30 Posts System Specs	I guess I'll just break down and buy a Kill-a-Watt. Thanks for the input guys/gals? Very useful. BTW I was running DiabloMiner

Feb 8, 2012, 03:24 PM	#7
AthlonX2 Better Than You Join Date: Sep 2006 Location: Toledo,Ohio Posts: 5,449 (2.25/day) Thanks: 729 Thanked 1,572 Times in 994 Posts System Specs	If your looking to measure GPU power dont buy a kill A watt. zalman makes some very nice vga meters and cpu meters http://www.zalman.com/ENG/product/Pr...ad.asp?idx=418 http://www.zalman.com/ENG/product/Pr...ad.asp?idx=417

Feb 8, 2012, 04:08 PM	#8
Arctucas Join Date: Jul 2006 Location: Cowtown, USSofA Posts: 1,627 (0.65/day) Thanks: 57 Thanked 275 Times in 216 Posts System Specs	Or use a clamp meter around the +12VDC wires between the PSU and the card while checking the voltage with another voltmeter, then apply Ohm's Law. __________________ Whiskey-Tango-Foxtrot. over.

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