Date: Mon, 16 Jul 2012 14:24:50 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: Re: xsha512-cuda & xsha512-opencl testing On Mon, Jul 16, 2012 at 06:15:44PM +0800, myrice wrote: > On Mon, Jul 16, 2012 at 5:35 PM, Solar Designer <solar@...nwall.com> wrote: > > BTW, xsha512-cuda produces nasty sound at maybe 5 KHz or so - is this > > the frequency of PCIe transfers or global memory accesses or something > > like that? > > Sound?? Yes. > You hear that from PC beeper or audio output? Neither. > It is weird and should not happen. Things like that do happen. When power consumption varies a lot, capacitors, etc. may produce vibrations and thus sound. > What the sound like? Just high frequency beeping - sometimes constant, sometimes with interruptions (I guess depending on what the program does). Alexander
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