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Monitoring Power(watts) usage of my GPU. [EVGA GTX 750 Ti FTW] - Page 2

post #11 of 26
Quote:
Originally Posted by Blindsay View Post

Ever here of a typo?, I imagine he, as did I just reveresed the lettering. I meant TDP and i imagine he did considering he got the name right for it (thermal design power ) the rest of what he said is accurate.

That said you cant extrapolate the power draw of the card from its TDP

Thank you and that is correct, it was a typo.
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post #12 of 26
Quote:
Originally Posted by Blindsay View Post

Ever here of a typo?, I imagine he, as did I just reveresed the lettering. I meant TDP and i imagine he did considering he got the name right for it (thermal design power ) the rest of what he said is accurate.

That said you cant extrapolate the power draw of the card from its TDP

Sure, I assume it is a typo, but TPD also plays a role here and is only a measure of power consumption.

You say the Total Power Draw figure is irrelevant because it is "advertising on EVGA's website".

Look, Nvidia calls it "graphics card power", measured in watts. Is that explanation enough?

A Kill-a-watt would do the trick, but from what I can see, 85W is the number for that card.
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post #13 of 26
kill a watt would measure everything... get this, i have always wanted one.

http://www.silentpcreview.com/Zalman_CPU_VGA_Power_Meter
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post #14 of 26
Quote:
Originally Posted by erik109 View Post

Sure, I assume it is a typo, but TPD also plays a role here and is only a measure of power consumption.

You say the Total Power Draw figure is irrelevant because it is "advertising on EVGA's website".

Look, Nvidia calls it "graphics card power", measured in watts. Is that explanation enough?

A Kill-a-watt would do the trick, but from what I can see, 85W is the number for that card.

But that's just coincidence. TPD and TDP are almost never the same, thus you cannot base your TPD on your TDP.
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post #15 of 26
Quote:
Originally Posted by ikem View Post

kill a watt would measure everything... get this, i have always wanted one.

http://www.silentpcreview.com/Zalman_CPU_VGA_Power_Meter

If you read the review, you'll know it's practically useless. The PCIe 16x slot itself delivers current on both 3.3V and 12V lines into a video card, up to 75W in total. Usually the power through the PCIe slot is much less than through the PEG, but this means that even with a single 6 or 8-pin PEG video card, the Zalman power meter will not provide an accurate measure of the power consumed by the video card.

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post #16 of 26
Quote:
Originally Posted by Duality92 View Post

But that's just coincidence. TPD and TDP are almost never the same, thus you cannot base your TPD on your TDP.


exactly thumb.gif
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post #17 of 26
You can calculate the TDP with
Quote:
The dynamic power consumed by a switching circuit is approximately proportional to the square of the voltage:
P = C V^2 f
where C is capacitance, f is frequency, and V is voltage.
Another formula could be P(R)= R*(I)^2 plus P(r)=r*(I)^2
Where R is the external resistenace r is the internal reisstance and I is the intensity
The TDP has a slighly loss of the energy used in the circuit and the components on it like resistors,capacitors,voltage leakage
Quote:
For example, the Pentium 4 2.8 GHz has 68.4 W typical thermal power and 85 W maximum thermal power. When the CPU is idle, it will draw far less than the typical thermal power. Datasheets normally contain the thermal design power (TDP), which is the maximum amount of heat generated by the CPU, which the cooling system in a computer is required to dissipate. Both Intel and Advanced Micro Devices (AMD) have defined TDP as the maximum heat generation for thermally significant periods, while running worst-case non-synthetic workloads; thus, TDP is not reflecting the actual maximum power of the processor. This ensures the computer will be able to handle essentially all applications without exceeding its thermal envelope, or requiring a cooling system for the maximum theoretical power (which would cost more but in favor of extra headroom for processing power).


This worth a read

LinkLink

But in video card I have noticed that they talk om the TDP based on the power input from the power connector and pcie slot,meanwhile the intel TDP is a maximum for a relative load maybe higher and could reach the number that intel says.For example my 2600k has a 105w TDP more or less at 1.240 with 4.4ghz(throught Hwinfo64)
Edited by PontiacGTX - 8/7/14 at 2:59pm
post #18 of 26
Quote:
Originally Posted by ikem View Post

kill a watt would measure everything...

That's why you measure with and without the card. It might not be 100% accurate but it gets close enough.
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post #19 of 26
Maybe @Ehume,@Shilka,@TwoCables can explain this better?
Edited by PontiacGTX - 8/7/14 at 3:09pm
post #20 of 26
Quote:
Originally Posted by Dark Volker View Post

So I've got an EVGA GTX 750 Ti FTW and I'm messing with the TDP settings in the GPU's BIOS and I need a way of calculating exactly how many watts my GPU is using at any one time. GPU-Z has something that monitors a percentage of TDP, but I'm not sure how accurate that is or how to calculate the exact power usage in watts using that. Is there a way to monitor power usage of a GPU with a program in Windows? Thanks!

 

Why do you want to do this? What are you looking to accomplish or to find out or learn? I mean, if you're trying to see if your 650W Antec Earthwatts has enough power, then yes, absolutely. The 750 Ti is a Maxwell card and so its Total Power Draw (yes, TPD) will be very very very very low.

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i5-2500K @ 4.5GHz (1.368-1.384V fixed voltage) ASUS P8P67 EVO B3 (UEFI ver. 1850) GTX 780 ASUS DirectCU II (1228 / 6300, 1.180V) G.SKILL Ripjaws X 8GB (2 x 4GB) 1866MHz, CL9 
Hard DriveHard DriveHard DriveOptical Drive
250 GB Samsung 840 EVO (C:\) 250 GB Samsung 840 EVO (D:\) 150 GB WD VelociRaptor Samsung SH-S243N 24x DVD Burner 
Optical DriveCoolingOSMonitor
Samsung SH-S203N 20X DVD Burner Thermaltake Frio Win 7 Home Premium x64 SP1 Retail AOC G2460PG (24" 1920 x 1080 144Hz G-SYNC) 
KeyboardPowerCaseMouse
Filco Majestouch 104-key Cherry MX Blues w/NKRO Corsair HX650 (Bronze, ordered on 12-12-2009) CM 690 Intellimouse Optical (1.1A) 1000Hz polling rate 
Mouse PadAudioAudio
Basic, but premium round X-Fi Titanium HD Klipsch ProMedia 2.1 (with 16 AWG Monster Cable... 
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