51–60 of 141 posts
Rather than inverting 12V DC to 240V AC and back, you could skip a step and use a laptop car charger, converting 12V DC straight to ~20V DC.
Earlier quoted context omitted.
How frequently do you test a new web framework with "10MB compressed JSONs"? On the other hand you can find a lot of benchmarks that use basically Hello World just to test your request response or some rather small request/response sizes, because this is what most applications actually do. You can add a simple database query to it for more realistic load. So, yes, this is more relatable to me as a backend developer b…
I see the issue with your premise. I don't test web frameworks. I do real work I very much routinely look at large data sets. They just happen to be wrapped up in a different container than ZIP. Typically, they are delivered in MOV, MP4, WAV, etc. I look at a 10MB file and try to remember the last time I counted that small.
Rather than inverting 12V DC to 240V AC and back, you could skip a step and use a laptop car charger, converting 12V DC straight to ~20V DC.
Don't DC-DC transformers use AC internally?
Adding the obligatory "what if M1" comment. Anandtech tested power draw of an M1 Mac Mini and found 4.2W at idle, 26.5W for the average multithreaded workload. 1/3rd idle power and the same power draw while running multithreaded benchmarks compared to the laptop serving a single client. Would be interesting to compare. https://www.anandtech.com/show/16252/mac-mini-apple-m1-teste...
For the load expected for pulling data from a simple redis cache, is an M1 actually the most efficient chip? Isn't the point of the M1 that it supports a bunch of complex workflows while remaining efficient? Aren't there even more power efficient chips out there that focus exclusively on simple integer operations, etc.?
https://www.st.com/en/microcontrollers-microprocessors/stm32...
> With an idle load, this particular laptop draws 14W of power with the screen turned off. That's an extremely high idle power usage, I also have a laptop with a Ryzen 9 4900HS (the ROG Zephyrus G14, the only laptop with this chip, to my knowledge), and it idles around 9-11W with the screen on . Most of that is actually because of the RTX 2060 that's bundled with it, and won't turn off in Linux because Nvidia doesn't…
You can use nvidia-prime to run on intel only right?
How does that work on a Ryzen laptop?
Technically, it should be "200 watts". The losses happen due to all the inversion and conversion (I think... right?)
The largest factor is the day-cycle. He gets 3 hours equivalent of Sun light a day. I really expected Australia to be more sunny than that.
> With an idle load, this particular laptop draws 14W of power with the screen turned off. That's an extremely high idle power usage, I also have a laptop with a Ryzen 9 4900HS (the ROG Zephyrus G14, the only laptop with this chip, to my knowledge), and it idles around 9-11W with the screen on . Most of that is actually because of the RTX 2060 that's bundled with it, and won't turn off in Linux because Nvidia doesn't…
(Obviously these two things aren't similar enough to compare directly, but it's fun to see the general progress/trend of powerusage over time. Cray-1 needed what? 100KW?)
> With an idle load, this particular laptop draws 14W of power with the screen turned off. That's an extremely high idle power usage, I also have a laptop with a Ryzen 9 4900HS (the ROG Zephyrus G14, the only laptop with this chip, to my knowledge), and it idles around 9-11W with the screen on . Most of that is actually because of the RTX 2060 that's bundled with it, and won't turn off in Linux because Nvidia doesn't…
> With an idle load, this particular laptop draws 14W of power with the screen turned off. That's an extremely high idle power usage, I also have a laptop with a Ryzen 9 4900HS (the ROG Zephyrus G14, the only laptop with this chip, to my knowledge), and it idles around 9-11W with the screen on . Most of that is actually because of the RTX 2060 that's bundled with it, and won't turn off in Linux because Nvidia doesn't…
Rather than inverting 12V DC to 240V AC and back, you could skip a step and use a laptop car charger, converting 12V DC straight to ~20V DC.
The motherboard uses most of its power from the 12v rail, and due to the galvanic isolation in the ATX power supply, it should be safe to do.
The 12VDC from the battery may not be in spec for the motherboard, but typically they'll work anyway.