Arno wrote:
>
> In comp.sys.ibm.pc.hardware.storage Ant <(E-Mail Removed)> wrote:
> > On 8/28/2010 11:03 PM PT, Rod Speed typed:
>
> > It has happened to me back in summer of 2005 with an old ASUS A7V333
> > motherboard/mobo. (lock ups and no more boot ups) and Quantum Fireball
> > Plus 30 GB IDE HDD (circuit controller died). They were damaged by a
> > recent PSU melt down. The mobo's circuit board had brown/orange coloring
> > on its circuit board, a horrible burning odor/smell, etc. The old HDD
> > also went dead too.
I never bothered to recover that drive's datas
> > since I had a backup.
>
> It is possible, but it requires a) the PSU regulator failing into
> overvoltage and b) no output-overvoltage protection. Both failing
> is very rare, hovever cheap PSUs often come without the protection
> circuitry. Reason: Price. Let me give you an idea (say 400W):
>
> - ElCheapo : $20
> - Mid-range : $80
> - Enermax with all protection: $120
> - Industrial with 10 year lifetime: $300-$500
>
> Now, at the lower end, using cheaper components alone does not cut
> it anymore, you have to use a lot less components. That means
> cutting out protection circuirty, using cheaper, less reliable
> regulators, cheaper transformers with lower insulation rating,
> etc.. Also your ElCheapo 400W unit is more likely a 250-300W unit,
> while a 400W Enermax is more likely 500-700W.
According to JonnyGuru.com, which tests lots of power supplies,
Enermax is good, but so are many other brands, and in 400W size,
quality brands can often be bought for $30-60.
What's the difference between a retail Enermax and something like a
Seasonic, Fortron-Source, Enhance, Channel Well, or Delta? Most seem
to use the same standard controller and protection chips and have
transformers, chokes, and filter capacitors of comparable size. Even
the cheapest PSUs contain protection for overvoltage and overcurrent,
but I haven't seen crowbar protection in any ATX PC PSU. Some newer
high-power PSUs use only high-quality capacitors, including but not
just Enermax, but my old 350W was full of PCE-TUR caps from CEC
Industries.