Re: processors, video

Hi Frank!

Thank on friendly and good reply.  Our idea is to test one GNU/Linux 
distribution for multimedia
www.mediainlinux.org
and one for audio called AGNULA
www.agnula.org
as well as some just video editing software packages for GNU/Linux.

Do those PSU and heating anomalies cause pixelation or similar effects besides 
crash of machine or possible burnout of CPU?


Thanks,


Vedran

On Tuesday 24 August 2004 19:23, Frank Hellmann wrote:
> Hi Vedran!
>
> Vedran Vucic wrote:
> >Dear colleagues,
> >
> >I am planning to buy graphic workstation. However, I do not need your
> >suggestion about brand, but I have heard that there are some phenomena
> > when procesors are concerned.
> >
> >Some my colleagues told me that heating f the processor may result in
> >pixelation or something like that.
>
> Improper cooling of processors and ram or overclocking them to much will
> likely result in random errors and most likely crashes of the machine.
> You should definatly go with the recommended heatsinks (buy boxed
> processors with heatsink), do not use special low-noise heatsinks/fans
> if not explicitly certified for your processor and stay in the limits
> regarding clock speed (eg. do not change the GHz numbers in the BIOS).
>
> I prefer to have extra fans for the case to get excessive heat out, even
> if this means it is not as quiet anymore. Extra video boards will
> generate extra heat inside the case.
>
> A good check is running memtest86 for a day to check for any memory
> related problems and run a couple of kernel builds just to see if  the
> processors performs right.
>
> As a side note: In the older days there were some problems doing mixed
> renderings on DEC Alpha or Intel processor based machines due to
> different FPU/math algorithms. The resulting images looked sometimes
> just a bit different. Bad if you are doing distributed network
> renderings and image sequences will flicker. But that is long gone (8
> years) and nearly forgotten... :-)
>
> >  In addition, I heard that low quality
> >powwer supply unit within computer may cause processor not to function
> >properly and that itcan cause small but visible disturbances of video.
>
> Yes, definatly go and buy a good power supply (PSU). A lot of rendering
> will need extra power from the PSU for a long time and doing that to an
> underpowered one will either result in random crashes and/or complete
> failure of the PSU. If the PSU is on its limits I wouldn't guarantee
> that it will deliver stable enough voltages for video, hence the video
> spikes/drop outs.... If your system needs, say 380 Watts, go and buy a
> 480 or 500 Watt PSU, just in case.
>
> The easiest might be to go and buy a complete machine from one of the
> specialized resellers (you name 'em...). Let these guys know that you
> are planning to put in a power sucking video board and they should
> provide you with a fitting PSU. Then this setup should be fine straight
> out of the box.
>
>        Cheers,
>                       Frank...
>
> >Is that true?  Do you have any experience in that?
> >
> >Thanks,
> >
> >
> >Vedran Vucic
>
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