The ultimate protection against Bestec PSUs

[Agent24]

Got a Bestec with high 5vSB rail? This will fix it magically...

http://cgi.ebay.com/20-pin-PC-ATX-Po...mZ280460686489

Ever wonder what can be a quick way to make your system more stable and in the mean time extend the length of your 20pin main connector ?

Instability of the +5VSB voltage on the motherboard can cause the system to freeze or become unstable. A simple solution is to add a large stabilizing capacitor at the connection point where the +5VSB voltage is supplied to the motherboard.

The JDResearch MSC has this large stablizing capacitor soldered on its 20-pin male ATX power connector which is to be connected to your motherboard. The other side of the MSC is simply connected to the power supply's 20-pin connector. Installing the MSC to your system is extremely easy !

[370forlife]

Re: The ultimate protection against Bestec PSUs

How exactly would this do anything?

Lets hope your 5vsb isn't over 6.3v, I have seen some bestec atx-250-12E's at almost 12v.

It's a teapo btw.

[Agent24]

Re: The ultimate protection against Bestec PSUs

How exactly would this do anything?

It wouldn't, that's why it's funny

(well, I'm sure it would do something, though nothing useful I imagine...)

[etnietering]

Re: The ultimate protection against Bestec PSUs

Well, if the instability was due to excessive ripple on the +5vsb, then it might help, but not with the problem of overvolting. And wow! 9 bucks for a 3 dollar adapter and a 30 cent capacitor!

Good deal? ehh....not so much...

[acstech]

Re: The ultimate protection against Bestec PSUs

Here's my protection against Bestec PSUs...

http://www.behrensmfg.com/hd3_1270.htm

[weirdlookinguy]

Re: The ultimate protection against Bestec PSUs



and then replace with a nice Delta.

[ratdude747]

Re: The ultimate protection against Bestec PSUs



unless it is a 12z, the 12e is the bad one.

[mockingbird]

Re: The ultimate protection against Bestec PSUs

I've got a Bestec ATX300-12E Revision D powering this computer and it's works great.

[stj]

Re: The ultimate protection against Bestec PSUs

unless it is a 12z, the 12e is the bad one.

sometimes that's not enough, you just have to go 20mm on the bitches!!!


let's hope this guy never buy's an Antec!

[370forlife]

Re: The ultimate protection against Bestec PSUs

Now come on guys, you can go too overboard. Something like this will do just fine:

[Toasty]

Re: The ultimate protection against Bestec PSUs

and then replace with a nice Delta.

[everell]

Re: The ultimate protection against Bestec PSUs

Got a Bestec with high 5vSB rail? This will fix it magically...

I don't think so!!! This gadget will not prevent 5vsb from going high....it will only filter whatever voltage is there.

The other solutions.....a hammer......an a-bomb......all seem rather childish. They are not solutions to the problem, only a way to vent anger and destroy any further value of the power supply.

This forum is power supply "design" and "troubleshooting". I think we ought to have a contest to see who can come up with the best solution to the Bestec problem. Think of it this way......if the Appolo 13 crew had a Bestec power supply powering their computer....and if it was needed to make a safe return back home to earth......what would you suggest. The NASA folks did a very spectacular job under very adverse conditions. Lets see what kind of ideas WE can come up with.

[370forlife]

Re: The ultimate protection against Bestec PSUs

This forum is power supply "design" and "troubleshooting". I think we ought to have a contest to see who can come up with the best solution to the Bestec problem. Think of it this way......if the Appolo 13 crew had a Bestec power supply powering their computer....and if it was needed to make a safe return back home to earth......what would you suggest. The NASA folks did a very spectacular job under very adverse conditions. Lets see what kind of ideas WE can come up with.

You win. I think your dm311 mod and you hopefully upcoming next one are probably the best solution for not just a bestec but any other psu with a 2 transistor 5vsb circuit.

[everell]

Re: The ultimate protection against Bestec PSUs

NO - I have not won. There is always someone who can build a better mousetrap!

I appreciate the compliment, and believe that my solution was a good one - but not necessarily the best. I am open for competition - and there may be a better way. Just think....if you were to come up with a better solution......a really fantastic idea.....it could lead to a good job, maybe even a patent. You younger guys ought to pay attention, and realize that there are always dreamers who come up with better ideas.

I have begun the new project with the ICE3BR4765J instead of the DM311 for my Bestec project #3. I am already bogged down with some problems (challenges). The 5vsb dropped from 5.10 volts with two transistor circuit to 4.75 volts with the new chip. Playing with the two resistor values on the 431 regulator didn't produce as much change as was expected. Reducing series isolator resistance from 270 ohms to 100 ohms didn't help either. So more tinkering.............

The real value of a contest like this would be to realize that you only have to deal with one circuit. Everything else stays as is......so no big surprises. The 5vsb either works or doesn't work, and its voltage value is either 5 volts, too low, or too high.

[stj]

Re: The ultimate protection against Bestec PSUs

I think we ought to have a contest to see who can come up with the best solution to the Bestec problem. Think of it this way......if the Appolo 13 crew had a Bestec power supply powering their computer....and if it was needed to make a safe return back home to earth......what would you suggest.

CAPRICORN-1

[everell]

Re: The ultimate protection against Bestec PSUs

CAPRICORN-1

Capricorn 1 didn't make it back to earth, but the crew did! This is a Catch 22 situation!!

So I interpret this as a "political" solution - and in some respects....I think you are so right. The US government inspectors should NOT allow China to fill up our land fills with Chinese made garbage. If a high quality level is expected AND enforced, the Bestec problem would either not exist, or not have been as severe.

On the other hand, prevention will not make the existing problem go away. So there are solutions to be found.

[stj]

Re: The ultimate protection against Bestec PSUs

the solution is actually real simple,

you remove the 5v standby wire from the atx cable, and bridge the 5v standbt & 5v pins on the mobo.
then you bridge the 5v-standby & power-on pins in the psu and use a real powerswitch like the old days!

you save electricity and have full reliability then.
the only downside is that windows cant turn the pwer off - who gives a shit!
if people are that lazy they shouldnt be allowed to use electricity!!

[370forlife]

Re: The ultimate protection against Bestec PSUs

Problem with that is a lot of USB ports get power from the 5vsb for whatever reason.

[shadow]

Re: The ultimate protection against Bestec PSUs

Sometimes it is adjustable.
I remember some of my older boards had a jumper setting to set whether the usb ports would be powered from the +5V circuit or the +5VSB circuit.

Dunno if this is something that could be adjusted with a BIOS setting? Probably not is my guess.

The reason why one would have the USB powered from the +5VSB circuit is to ensure that wake up from USB works (USB mice and keyboards for example)...or some people have rechargeable USB gadgets. You know thing like MP3 players, iPods etc. They can be recharged while the PC is turned off if the USB is powered from the +5VSB power circuit.

[ratdude747]

Re: The ultimate protection against Bestec PSUs

The other solutions.....a hammer......an a-bomb......all seem rather childish. They are not solutions to the problem, only a way to vent anger and destroy any further value of the power supply.

it was a joke, fyi