On Wed, 22 Dec 2021 at 10:36, Tim via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
On Fri, 2021-12-03 at 10:45 +1030, Tim via users wrote:
[...]
It's scary when you see PCs with 500 watt power supplies (or the
hardware manuals saying you need one), but they don't use 500 watts all
the time, if at all. It's just their capability. The main idea is
that a beefy power supply doesn't have any problems when everything
cold boots. Probably the only thing that's really going to cause the
average user's PC to use a lot of power is gaming with fancy on-the-fly
graphics rendering.
Spinning up a bunch of rotating media disks can be a problem booting. Even
if the server has a big power supply, your UPS may not handle the load. I used
get around that by booting from a small disk and manually mounting the RAID
array. Newer disks do use a fraction of the power of older models. but
lower prices just mean people stuff boxes with as many drives as it can
hold. Maybe current systems are smarter about staging drive startup.
It isn't only gaming that that is power hungry -- vendors have to consider a
range of use cases. My group at work once got the loan of a high-end Dell
workstation that had been used as a node in a large numerical model. On
boot the system immediately started heavy numerical processing and
the 1.4 KVA UPS cut it off. The manual said it needed 1200 VA power.
Fortunately we had a 3KVA UPS originally used for deskside SGI "mini-super"
system.
George N. White III
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