Showing posts with label Calculate Power Draw. Show all posts
Showing posts with label Calculate Power Draw. Show all posts

Saturday, November 7, 2015

Overclocked Power Draw Calculator

Back in 2012 when I first started this blog(there aren't any posts left from then because it was literally just me ranting about everything in existence) I figured out how to calculate overclocked power draw. Over the years I have tested the equation and tried to perfect it. I failed to perfect it. However I have found all it's flaws and so I feel safe in releasing a program that does the calculation for you. The usage should be self explanatory. However I recommend you read the README.txt to understand the flaws. Like everything else I make it's still written in Java. Java 7 might run it but you will most likely need Java 8.

Download Link

Pic of it in action:























Donate if you want to see the app get better! With enough funds I can make this take operating temperature and architecture into account and possibly extend the functionality to include some degradation rate estimates. I could also make it a whole system power draw calculator but I think that's unnecessary because there are plenty of those on the net already.

Monday, September 7, 2015

Something Quickly: How to calculate overclocked current and power draw for CPUs and GPUs.

This is what you use to calculate power draw:
(MHzOC/MHzstock)* (VOC2*(TDP/Vstock2))
Just plug in the numbers and you'll get the power draw of the CPU or GPU you're overclocking once it's overclocked. It does have a few issues it only works for specific temperatures and TDP doesn't always give accurate values it's best if you measure the initial power draw rather than relying on the TPD to be accurate. However if you do you power draw and stock voltage measurement when under load and your temperature when overclocked isn't different this will be accurate. A power draw value isn't all that useful when you're trying not to kill a VRM. To get current draw you just use this version of it:
(MHzOC/MHzstock)* (VOC*(TDP/Vstock2))
The power draw value is good for when you're designing a chiller or trying to choose coolers the current draw value is for not killing a VRM. The equation has a +/- 10% margin of error so keep that in mind when using it(AFAIK it does not work with Nvidia Maxwell GPUs at all). It can be much more accurate if I could do more research into it but that requires that I can get my hands on a bunch of CPUs to test it with and several liters of LN2 so I can keep very specific temperatures.

Just for the sake of doing a quick proof: 
 My 3960X measured 353W at 5Ghz using 1.56V running IBT. It has a stock voltage of 1.18V, TDP of 130W and stock clock of 3.3Ghz. Lets plug them in:

(5/3.3)*(1.562(130/1.182))= 344W
So it a little bit of but hey better than nothing.