Toshiba TV29C90 problem; Image fades to black...

[Franklin]

On 13 Oct 2004, General Schvantzkoph wrote:

One other important thing. Putting 6 hard disks in a case
demands that there be a lot of air circulating around them. If
you don't keep thenm cool, then the ones closest to the middle
of the stack will overheat and die. I've seen that happen in
servers. You might consider using external HDDs if you have
problems.

You solve the problem by getting a server case that's designed
to handle a large number of drives. You want a case that has
good air flow over all of the drives. It's OK to passively cool
a single drive in a desktop machine because desktop drives have
very little activity. In a fileserver the drives work much
harder so you need to blow air over them to keep them cool.

I am the OP.

I have solved my problem of heat generation by not buying IBM/Hitchi
or Western Digital hard drives. Those drives undoubedly perform well
but they get way too hot and can be a bit too noisy for me.

My hottest drive is a Seagate Barracuda and Dtemp from
http://private.peterlink.ru/tochinov/ says it runs at 41 C. It is
the system drive with most of the read/write action, The other
drives run at a comfortable 30 to 35 C when idling.

My cooling is very simple. I have the PSU fan, the cpu fan and one
80mm case fan which I run at less than half speed to keep the noise
down. The ambient room temp is about 20C.

It is almost a 'bumble-bee' system. I am told that early dynamics
theory calculated that the bumble-bee should not be able to fly.
Theory suggests my PC should not be so cool nor so quiet. But in
real life it works.

 

[Tom MacIntyre]

On Wed, 13 Oct 2004 18:45:15 +0100, "Chip" <anneonymouse@virgin.net>
wrote:

"Tom MacIntyre" <tom__macintyre@hotmail.com> wrote in message
newsunqm0ht6vikt57vqnc1hj0nu1gniqqa8j@4ax.com...
On Wed, 13 Oct 2004 01:45:38 -0500, none <gothika@bellsouth.net
wrote:

On Tue, 12 Oct 2004 23:05:23 GMT, "DaveW" <none@zero.org> wrote:

Hmmm ... I think you should more seriously be thinking about an Antec 550
Watt True Power supply.

With that many Hd's I'd be thinking about dedicating one good psu to
the motherboard and the optical drives/floppy and using separate
supplies for alll those Hd's.(maybe 2 drives to a psu rated at at
least 350-400 watts.)
Depends on what type of computing you'll doing and how intensive too.

I forget, but do the drives use both +5 and +12,

Yes.

and, if so, will this
arrangement be enough to regulate a supply?

I don't know what you mean by that.

Chip

Computer supplies need to be regulated to achieve the correct output

voltage, and both the 12 and 5 volt supplies may need to be loaded to
a certain level to achieve this.

Tom

 

[Duddits]

On Tue, 12 Oct 2004 15:06:35 +0100, Franklin <no_thanks@mail.com> wrote:

What rating PSU should I use on a system which has an Athlon 2400+
with a modest graphics card (old GeForce2 MX 32MB) and 768 MB of SD-
RAM. Unusually, it will have *SIX* IDE internal hard drives.

All the rest of the system is pretty normal with no overclocking on
the cpu.

Would a decent 350W PSU be enough? I am thinking of this Nexus PSU.
http://www.nexustek.nl/nx3500.htm The specification chart shows
current delivery at min load, normal load, max load:

+3.3V 0.3A 14.0A 21.2/28A
+5V 1.0A 12.7A 30/25.5A
+12V 0.2A 4.5A 16A

(1) +3.3V & +5V total output not exceed 220Watt.
(1a) When +3.3V is loaded to 28A, then the +5V maximum load is 25.5A.
(1b) When +3.3V is loaded to 21.2A, the +5V maximum load is 30A.
(2) +3.3V & +5V & +12V total output not exceed 330Watt.

---

Is this any good for my needs?

Thermaltake 420 watt PurePower $39.00
An excellent power supply that will meet your needs.
http://www.newegg.com/app/ViewProductDesc.asp?description=17-153-006&depa=0

regards

Dud
--

You! Out of the gene pool!

 

[Glenn Gundlach]

Al Smith <invalid@address.com> wrote in message news:<2XXad.147054$Np3.6335131@ursa-nb00s0.nbnet.nb.ca>...

Would a decent 350W PSU be enough? I am thinking of this Nexus PSU.
http://www.nexustek.nl/nx3500.htm The specification chart shows
current delivery at min load, normal load, max load:

+3.3V 0.3A 14.0A 21.2/28A
+5V 1.0A 12.7A 30/25.5A
+12V 0.2A 4.5A 16A

(1) +3.3V & +5V total output not exceed 220Watt.
(1a) When +3.3V is loaded to 28A, then the +5V maximum load is 25.5A.
(1b) When +3.3V is loaded to 21.2A, the +5V maximum load is 30A.
(2) +3.3V & +5V & +12V total output not exceed 330Watt.

---

Is this any good for my needs?


With 6 drives I'd go with a larger power supply, get at least a 450W
supply or even larger. An Antec 550W supply is only $108. You don't want
to waste your time hunting down system glitches because you saved 30 bucks
on a power supply.


You don't want to waste $30 for nothing, either.

Actually I would. It takes very little time use up $30 tracking down
the problem. And THEN, you STILL have to get the bigger supply. After
the computer and 6 HDDs, $30 is nothing.
My $0.02
gg

 

[Watson A.Name - \"Watt Su]

"kony" <spam@spam.com> wrote in message
news:kcnpm09f0bpipffbtss44np08f8rj1mb7s@4ax.com...

On Wed, 13 Oct 2004 01:53:07 -0500, none
gothika@bellsouth.net> wrote:

On Tue, 12 Oct 2004 21:23:10 GMT, Al Smith <invalid@address.com
wrote:

Would a decent 350W PSU be enough? I am thinking of this Nexus
PSU.
http://www.nexustek.nl/nx3500.htm The specification chart shows
current delivery at min load, normal load, max load:

+3.3V 0.3A 14.0A 21.2/28A
+5V 1.0A 12.7A 30/25.5A
+12V 0.2A 4.5A 16A

(1) +3.3V & +5V total output not exceed 220Watt.
(1a) When +3.3V is loaded to 28A, then the +5V maximum load is
25.5A.
(1b) When +3.3V is loaded to 21.2A, the +5V maximum load is 30A.
(2) +3.3V & +5V & +12V total output not exceed 330Watt.

---

Is this any good for my needs?


With 6 drives I'd go with a larger power supply, get at least a
450W
supply or even larger. An Antec 550W supply is only $108. You
don't want
to waste your time hunting down system glitches because you saved
30 bucks
on a power supply.


You don't want to waste $30 for nothing, either.

Yes you do. The lowest rated supply I use for Athalon systems is 400
watts, and that is only with one HD.
Anymore and I go with a 500 watt.
Believe me if you really try and do any serious computing loads with
an under rated power supply you're asking for serious migraines.


It's true that an insufficient power supply can cause both
instability and eventual damage, but the typical Athlon
system does not need 400W, and there is almost no "PC"
system that needs 500W, even if the vast majority of the
current were concentrated on only the 5V or 12V rail.

With a typical PC, that being current-gen CPU, a couple hard
drives, budget/low-end video card, etc, 300W PSU in a good
name brand is sufficient. SFF systems demonstrate every day
that even a 180-250W PSU will run a modern built with enough
margin for another hard drive or two... but the PSU may need
replaced sooner.

Generics on the other hand, are a lottery. Their wattage
rating means almost nothing, they can only be assumed to be
somewhere inbetween 200W and 400W without further evidence.

I'm surprised at all the posts that have so many assertions, yet so
little thought and consideration. I don't think I've yet seen an
authoritative URL or two to back up those assertions.

Very little solid advice. Like check the hard disk and see what the
current ratings are, and add them up to get a total. Especially the
+12VDC because the motor takes quite a bit of current from that.

And I really detest those claims that PCs don't use very much power.
The most I can get on a 20A circuit is about a dozen, and the breaker
blows. I figure that's about 150W per PC. And those are old timers,
like P233s.

If you want to play it safe, buy a couple external HD enclosures with
power brick, and use them with a USB 2.0 card. That will relieve the
case and PS of a lot of power and heat. I have a couple of these, and
they get fairly warm, after an hour or so, so they do suck a fair amount
of power.

 

[Chip]

"kony" <spam@spam.com> wrote in message
news:kcnpm09f0bpipffbtss44np08f8rj1mb7s@4ax.com...

[snip]

Generics on the other hand, are a lottery. Their wattage
rating means almost nothing, they can only be assumed to be
somewhere inbetween 200W and 400W without further evidence.

Absolutely correct. "Qtec" - for example - are a very popular low-end
brand. You might refer to them as a no-name, but arguably they are one step
up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which basically
means nothing at all. They don't specify for how long this peak is
available, nor under what conditions. Its a bit like saying these pills
will increase your penis length by "up to" 4 inches.

Furthermore, they give no indication at all about what the sustained power
is. But don't worry, 550w is lots isn't it, so surely it can't be a
problem. LOL

So what is the max. current available on the 12v rail on a Qtec 550w? 30A
maybe? 28A? 25A?

No. Its 14A. Read it and weep. 14A.

It wouldn't power my laptop.

Chip

 

[Matt]

Watson A.Name - "Watt Sun, the Dark Remover" wrote:

I'm surprised at all the posts that have so many assertions, yet so
little thought and consideration. I don't think I've yet seen an
authoritative URL or two to back up those assertions.

Very little solid advice. Like check the hard disk and see what the
current ratings are, and add them up to get a total. Especially the
+12VDC because the motor takes quite a bit of current from that.

Harrumph ... I wrote:

You have already done about half the work. Now hunt down the specs for your disk drives, and do the addition problems. See also something like:
http://www.jscustompcs.com/power_supply/

See the AMD builders' guide, page 7, at:

http://www.amd.com/us-en/Processors/SellAMDProducts/0,,30_177_4458_3505%5E869%5E4348%5E1065,00.html

You might also need to know that DC Power = (DC voltage) x (DC current).
Current is the same as amperage.
Eg 12V x 2.5A = 30 Watts.

 

[Gareth Tuckwell]

Absolutely correct. "Qtec" - for example - are a very popular low-end
brand. You might refer to them as a no-name, but arguably they are one
step up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which
basically means nothing at all. They don't specify for how long this peak
is available, nor under what conditions. Its a bit like saying these
pills will increase your penis length by "up to" 4 inches.

You can get a power supply that will increase your penis length by 4
inches??
I gotta get me one of those!!

Lol!

 

[Chip]

"Gareth Tuckwell" <ContactGT@hotmail.com> wrote in message
news:Tcvbd.88$hy5.85@newsfe5-gui.ntli.net...

Absolutely correct. "Qtec" - for example - are a very popular low-end
brand. You might refer to them as a no-name, but arguably they are one
step up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which
basically means nothing at all. They don't specify for how long this
peak is available, nor under what conditions. Its a bit like saying
these pills will increase your penis length by "up to" 4 inches.

You can get a power supply that will increase your penis length by 4
inches??
I gotta get me one of those!!

"Up to" four inches!

Chip

 

[Tom MacIntyre]

On Thu, 14 Oct 2004 14:39:38 GMT, kony <spam@spam.com> wrote:

On Thu, 14 Oct 2004 14:09:48 +0100, "Chip"
anneonymouse@virgin.net> wrote:


"kony" <spam@spam.com> wrote in message
news:kcnpm09f0bpipffbtss44np08f8rj1mb7s@4ax.com...

[snip]

Generics on the other hand, are a lottery. Their wattage
rating means almost nothing, they can only be assumed to be
somewhere inbetween 200W and 400W without further evidence.

Absolutely correct. "Qtec" - for example - are a very popular low-end
brand. You might refer to them as a no-name, but arguably they are one step
up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which basically
means nothing at all. They don't specify for how long this peak is
available, nor under what conditions. Its a bit like saying these pills
will increase your penis length by "up to" 4 inches.

Furthermore, they give no indication at all about what the sustained power
is. But don't worry, 550w is lots isn't it, so surely it can't be a
problem. LOL

So what is the max. current available on the 12v rail on a Qtec 550w? 30A
maybe? 28A? 25A?

No. Its 14A. Read it and weep. 14A.

It wouldn't power my laptop.

14A of stable, clean power is enough for most basic systems.
It might not be sufficient for 6 drives PLUS a CPU using 12V
rail for power, nor adding a high-end modern video card, but
it would run any typical mid-grade system fine (if that 14A
were from a decent PSU).

The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Tom

 

[Don Klipstein]

In article <10mss5rdnqfa51d@corp.supernews.com>, Watson A.Name - \"Watt
Sun, the Dark Remover\" wrote:

I'm surprised at all the posts that have so many assertions, yet so
little thought and consideration. I don't think I've yet seen an
authoritative URL or two to back up those assertions.

Very little solid advice. Like check the hard disk and see what the
current ratings are, and add them up to get a total. Especially the
+12VDC because the motor takes quite a bit of current from that.

And I really detest those claims that PCs don't use very much power.
The most I can get on a 20A circuit is about a dozen, and the breaker
blows. I figure that's about 150W per PC. And those are old timers,
like P233s.

How many watts, how many volt-amps, and what's the efficiency as well
as the power factor of the power supply?

- Don Klipstein (don@misty.com)

 

[kony]

On Thu, 14 Oct 2004 15:49:37 GMT, Tom MacIntyre
<tom__macintyre@hotmail.com> wrote:

14A of stable, clean power is enough for most basic systems.
It might not be sufficient for 6 drives PLUS a CPU using 12V
rail for power, nor adding a high-end modern video card, but
it would run any typical mid-grade system fine (if that 14A
were from a decent PSU).

The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

 

[Chip]

"kony" <spam@spam.com> wrote in message
news:eadtm0d5jj9l9l41pgv3gnhqlehdmrjcnt@4ax.com...

On Thu, 14 Oct 2004 15:49:37 GMT, Tom MacIntyre
tom__macintyre@hotmail.com> wrote:


14A of stable, clean power is enough for most basic systems.
It might not be sufficient for 6 drives PLUS a CPU using 12V
rail for power, nor adding a high-end modern video card, but
it would run any typical mid-grade system fine (if that 14A
were from a decent PSU).

The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

I think you may be mistaken there. I have come across a number of boards
that don't have the 4-pin connector, but still run the CPU off the 12v
supply. The Albatron nf2 board is one that springs to mind.

Chip

 

[kony]

On Thu, 14 Oct 2004 19:21:39 +0100, "Chip"
<anneonymouse@virgin.net> wrote:

The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

I think you may be mistaken there. I have come across a number of boards
that don't have the 4-pin connector, but still run the CPU off the 12v
supply. The Albatron nf2 board is one that springs to mind.

Nope, then it uses 5V for CPU. What made you think it used
12V? Measure it with a multimeter.

If this is the Albatron you're referring to,
http://www.amdboard.com/km18g-pro.jpg
it clearly is only 2 phase VRM, 5V CPU power.

If you have other boards in mind, supply link to a decent
picture. There are definitely NONE from any remotely
recognizable mainstream motherboard manufacturers, except
those not traditionally considered "PC" boards... something
using EPS 24 pin ATX or another deviation from the 20 pin
ATX connector. The reason for this is that no competent
designer will derive CPU power from a single 12V lead on the
ATX 20-pin wiring harness.

 

[Chip]

"kony" <spam@spam.com> wrote in message
news:tvitm09vdcmttobqj6ag8j0a5slu3airun@4ax.com...

On Thu, 14 Oct 2004 19:21:39 +0100, "Chip"
anneonymouse@virgin.net> wrote:


The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

I think you may be mistaken there. I have come across a number of boards
that don't have the 4-pin connector, but still run the CPU off the 12v
supply. The Albatron nf2 board is one that springs to mind.

Nope, then it uses 5V for CPU. What made you think it used
12V? Measure it with a multimeter.

If this is the Albatron you're referring to,
http://www.amdboard.com/km18g-pro.jpg
it clearly is only 2 phase VRM, 5V CPU power.

When you say "clearly", how can you be clear that its 5V CPU power? I can
see how you can deduce whether its two or three phase, but how can you tell
its a 5v design?

Chip

 

[kony]

On Thu, 14 Oct 2004 20:27:25 +0100, "Chip"
<anneonymouse@virgin.net> wrote:

"kony" <spam@spam.com> wrote in message
news:tvitm09vdcmttobqj6ag8j0a5slu3airun@4ax.com...
On Thu, 14 Oct 2004 19:21:39 +0100, "Chip"
anneonymouse@virgin.net> wrote:


The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

I think you may be mistaken there. I have come across a number of boards
that don't have the 4-pin connector, but still run the CPU off the 12v
supply. The Albatron nf2 board is one that springs to mind.

Nope, then it uses 5V for CPU. What made you think it used
12V? Measure it with a multimeter.

If this is the Albatron you're referring to,
http://www.amdboard.com/km18g-pro.jpg
it clearly is only 2 phase VRM, 5V CPU power.

No, its not. As soon as I posted I thought perhaps on reflection it was not
their nf2 board.


If you have other boards in mind, supply link to a decent
picture.

I will if I can find it. I specifically remember a review of an Albatron
board where they were questioning the sanity of the designers not including
the P4 connector on a 12V board. Perhaps it was the KT600 or KT880 board, I
can't remember.

Ah, but the thing is, reviewers are often kids who barely
know what they're doing. Being "in print" doesn't make it
factual... something you will understand better when you are
older.

There are definitely NONE from any remotely
recognizable mainstream motherboard manufacturers, except
those not traditionally considered "PC" boards... something
using EPS 24 pin ATX or another deviation from the 20 pin
ATX connector. The reason for this is that no competent
designer will derive CPU power from a single 12V lead on the
ATX 20-pin wiring harness.

Not so. See my comment above.

To be kind, you have assumed something that isn't true, or
trusted someone (a reviewer?) who is clueless. Some
reviewers I've corresponded with just don't have enough
experience to realize that even though AMD's later design
guides recommend 12V for CPU power, that doesn't mean all
motherboard manufacturers do so. They are headstrong and
foolish to never bother testing their theories, or bothering
to take voltage measurements.

There are no brand name boards having _ONLY_ 20 pin ATX
conn. that use 12V for CPU. If you do find a clueless
reviewer that claims differently, be sure to keep looking at
other reviews of the same motherboard before trusting a
reviewer who is in error.

I seriously doubt that even an unknown very poor generic
board manufacturer would have an engineer competent enough
to get any motherboard working, but would make the mistake
of trying to power CPU by 12V without 2nd 12V input, whether
it be from a 24 pin connector or 2nd, 4-pin connector or
something less common/proprietary.

 

[kony]

On Thu, 14 Oct 2004 20:46:05 +0100, "Chip"
<anneonymouse@virgin.net> wrote:

"kony" <spam@spam.com> wrote in message
news:tvitm09vdcmttobqj6ag8j0a5slu3airun@4ax.com...
On Thu, 14 Oct 2004 19:21:39 +0100, "Chip"
anneonymouse@virgin.net> wrote:


The CPU doesn't need the 12 VDC, does it?

That is part of the problem with PS choice...the consideration must be
made for amperage needs for all voltages, not just total power.

Yes, modern P4 or Athlon 64 platforms and many (mostly
nForce2) Athlon XP do use 12V for CPU. The CPU power is
derived from 12V input by step down regulation. Any board
using 12V for CPU power will have the "Intel" 4-pin 12V
connector on it. When there is no 4-pin 12V input the odds
are overwhelming on a "PC" that it's using 5V for CPU power,
as did earlier Athlon & Pentium 3 'boards.

I think you may be mistaken there. I have come across a number of boards
that don't have the 4-pin connector, but still run the CPU off the 12v
supply. The Albatron nf2 board is one that springs to mind.

Nope, then it uses 5V for CPU. What made you think it used
12V? Measure it with a multimeter.

If this is the Albatron you're referring to,
http://www.amdboard.com/km18g-pro.jpg
it clearly is only 2 phase VRM, 5V CPU power.

When you say "clearly", how can you be clear that its 5V CPU power? I can
see how you can deduce whether its two or three phase, but how can you tell
its a 5v design?

Because of the amperage needed plus the 2 phase design,
there is not enough V margin for using 3V, and there isn't
sufficient supply line for 12V. There are no other
high-current rails on a PC power supply.

Then again there's experience, I get bored with same old
plug-part-A-in-slot-B, and hack away at boards just for the
heck of it, haven't had a board in years that I didn't take
voltage measurements on. You start to notice these things
after a while, and then there's overclocking... for extreme
overclocking on an Athlon board that uses 5V for CPU it may
be necessary to suppliment the power plane with a jumper
wire (among other things), as example:
http://69.36.189.159/usr_1034/M7NCG_5V_Mod.jpg

 

[larrymoencurly]

"Chip" <anneonymouse@virgin.net> wrote in message news:<2t7c2mF1shd7gU1@uni-berlin.de>...

"Qtec" - for example - are a very popular low-end

brand. You might refer to them as a no-name, but arguably they are one step
up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which basically
means nothing at all.

I didn't believe it until I visited their website. This has got to be
the first time that a company has admitted that its most prominently
advertised power rating was for peak power. Is it a sign of greater
honesty, or of lower standards?

Are you sure that Q-tec is a step above no-names? This picture of the
insides of their 550W model: www.bit-tech.net/images/review/123/7.jpg
Makes i seem more like a decent 250W.

 

[CBFalconer]

larrymoencurly wrote:

"Chip" <anneonymouse@virgin.net> wrote in message:

"Qtec" - for example - are a very popular low-end brand. You
might refer to them as a no-name, but arguably they are one step
up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which
basically means nothing at all.

I didn't believe it until I visited their website. This has got
to be the first time that a company has admitted that its most
prominently advertised power rating was for peak power. Is it a
sign of greater honesty, or of lower standards?

Are you sure that Q-tec is a step above no-names? This picture of the
insides of their 550W model: www.bit-tech.net/images/review/123/7.jpg
Makes i seem more like a decent 250W.

5 Va.c. _________\|____ 1 k ohm ___________________ 5 V out
/| | |
diode | |
1000 uF 5V zener
|________|
|
gnd

should provide 5v regulated with a 600 or more peak power output
rating. Depends only on the quality of the capacitor. Maybe I
should go into business.

--
Chuck F (cbfalconer@yahoo.com) (cbfalconer@worldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home.att.net> USE worldnet address!

 

[Watson A.Name - \"Watt Su]

"CBFalconer" <cbfalconer@yahoo.com> wrote in message
news:416F7B74.E4EAAB68@yahoo.com...

larrymoencurly wrote:
"Chip" <anneonymouse@virgin.net> wrote in message:

"Qtec" - for example - are a very popular low-end brand. You
might refer to them as a no-name, but arguably they are one step
up from that. They produce a very popular 550w PSU.

The first thing to note is that by 550w, they mean *Peak*. Which
basically means nothing at all.

I didn't believe it until I visited their website. This has got
to be the first time that a company has admitted that its most
prominently advertised power rating was for peak power. Is it a
sign of greater honesty, or of lower standards?

Are you sure that Q-tec is a step above no-names? This picture of
the
insides of their 550W model:
www.bit-tech.net/images/review/123/7.jpg
Makes i seem more like a decent 250W.


5 Va.c. _________\|____ 1 k ohm ___________________ 5 V out
/| | |
diode | |
1000 uF 5V zener
|________|
|
gnd

should provide 5v regulated with a 600 or more peak power output
rating. Depends only on the quality of the capacitor. Maybe I
should go into business.

600 or more _what_?

Where do you get 5VAC?

> --