Re:Making PyPy's GC and JIT produce a sound [video]
by sidewndr46 on Thursday August 22, 2024 @08:06PM
(#41325274)
Just need a proof of concept for data exfiltration from a secure facility by using ultrasonic coil whine and you too can be a security researcher!
Re:Making PyPy's GC and JIT produce a sound [video]
by neovaganyan on Friday August 23, 2024 @03:07AM
(#41326741)
I've actually noticed something similar on my GPU. Not sure if it's the same thing but whenever I'm playing Minecraft it makes a weird sound I don't really know how to describe, but as soon as I navigate away the sound goes away (some performance mods probably halt it's execution/rendering when not in focus).
I'm very curious about what exactly makes the sound and how it works. Glad to know it isn't only me because for some time I was afraid my GPU was defective :^)
Re:Making PyPy's GC and JIT produce a sound [video]
by mystified5016 on Friday August 23, 2024 @08:26AM
(#41328403)
A lot of the time it can happen if you're rendering a ridiculous number of frames. I used to get it in game menus where the FPS would spike into the hundreds. Other than that, just general high load will do it.
The noise comes from inductors in the GPU core power supply. Under the right load conditions, the coil in the inductor begins to resonate. The magnetic fields change so rapidly and contain so much energy that they physically push the coil until it resonates at some small fraction of the switching frequency. It's a pretty neat, if extraordinarily annoying phenomenon
In some llama.cpp versions on my home inference rig it would manifest as a sort of squelchy sound that would match the generation of characters on the screen, reminiscent of the effect often used during dialog in 8-bit era video games.
I found it quite comfy.