1000 whats!

[Pyr0Beast]

Re: 1000 whats!

Can you point to that 'anybody' that will confirm what you said all on their own ?
Excluding me.

Yes, Arguing with me is a waste of time. Especially when your arguments don't hold water and are nothing short of insulting anyone who even dares to question your 'knowledge'.

[PCBONEZ]

Re: 1000 whats!

ANYBODY can confirm what I said all on their own.
- Including you..

You have a totally twisted mind when it comes to how things work.
You don't even understand the basics.
And arguing with you is a waste of time.
.

[Pyr0Beast]

Re: 1000 whats!

Well. You are full of shit as well.

Give me the link and stop whining.

Also. Your rants do not prove you are right in any point you've made in previous posts.

[PCBONEZ]

Re: 1000 whats!

You are full of shit as usual.

Long detailed thread on this topic, oh, 2-3 years ago complete with charts and graphs and data sheet excerpts as well and a link to an article that covers in in detail that [unlike yourself] understands how things work.

I suggest you go read it.
- You might even learn something. [If that's even possible.]
.

[Pyr0Beast]

Re: 1000 whats!

Really?
Did you take a special class for that?

They are both 'silicon'.

And it's FAR more than 10-20%.
Go read some data sheets and do the math.
.

No, it is common knowledge.

So is sand - 'silicon', but it doesn't conduct anything.

How much 'far' more it is ?
Take 1N5818 and 1A passing current.
With single diode, forward voltage is 0.5V @ 1A, 0.5W dissipation
Halve the passing current and drop is 0.45V-0.43 @ 0.5A x 2 = 0.45W, which is 10%-15% less, like I have said.

[Rulycat]

Re: 1000 whats!

Why do manufacturers like to use a jap lytic for the primary and crap lytics for the sceondaries?

[ratdude747]

Re: 1000 whats!

Only two molex plugs? Even a $10 unit I found on fleabay had four.

six

3 per wire, with a berg for a floppy on the end

[PCBONEZ]

Re: 1000 whats!

Total dissipated watts for both would be 10-20% less. And even that due to lower diode drop voltage because of current.

Diodes are not mosfets.

Really?
Did you take a special class for that?

They are both 'silicon'.

And it's FAR more than 10-20%.
Go read some data sheets and do the math.
.

[c_hegge]

Re: 1000 whats!

Only two molex plugs? Even a $10 unit I found on fleabay had four.

[ratdude747]

Re: 1000 whats!

thick fins too... so heat flows out a lot better as well.

it seems like a good psu... just has 5 zillion cables:

20+4 ATX
4 pin p4
8pin p4
2x 6 pin PCIe
2x 8 pin PCIe
2x SATA (3 plugs per line, perfect for my rig)
2x molex (3 molex and one berg per line)

but they all have black fishnet stuff on the to avoid tangles and look good... it seems a lot cleaner that way.

if all goes well, I think i may have a unit to last me a good long time (950w will be sufficient for a long time)

[Pyr0Beast]

Re: 1000 whats!

Then put two in parallel each with 2.5 amps [the same 5 amps split between them] passing through, then the -total- watts for both would be something like 60% of X.

Total dissipated watts for both would be 10-20% less. And even that due to lower diode drop voltage because of current.

Diodes are not mosfets.

[PCBONEZ]

Re: 1000 whats!

the heatsinks are bigger than you think. they run nearly full length, and it is a larger than normal length. for 950w, it looks fine to me.

Those heatsinks have deep fins too. - Lots of surface area that way.

[everell]

Re: 1000 whats!

So glad that you are enjoying it, Ratdude. I have plenty of other power supplies to tinker with, and this one would have ended up in the attic collecting dust.

[ratdude747]

Re: 1000 whats!

the heatsinks are bigger than you think. they run nearly full length, and it is a larger than normal length. for 950w, it looks fine to me.

[PCBONEZ]

Re: 1000 whats!

Looks kinda light on heatsinks for a 950W unit.

They use multiple silicon in parallel.
That reduces heat exponentially.

If you have a diode that throws off X-watts of heat with 5 amps going through it.
-
Then put two in parallel each with 2.5 amps [the same 5 amps split between them] passing through, then the -total- watts for both would be something like 60% of X.

[c_hegge]

Re: 1000 whats!

I've seen worse. It's not as bad as having no fins on them at all.

[Trinite]

Re: 1000 whats!

Looks kinda light on heatsinks for a 950W unit.

[ratdude747]

Re: 1000 whats!

he sent it my way and it has been recapped...

it runs well... it was giving me 12.54v on all 4 12v rails. all other voltages were well in spec. and that was with no load... the 12v will go down with current draw i'd imagine...

one of the old teapos had severe damage... a uber-thick ground wire had put a 3-4mm deep dent in the top of a 3300uf cap. i suspect it plaid a role of this one hitting the junk bin.

I re-adjusted the zip tie holding the cables in the unit... that way no more crushed caps.

it sure had a heavy ground plane... with a 30w 380c iron @ full heat, i had to use the power from my 45w desoldering iron to recap some of the caps... jeez! it got done thank goodness...

what i found odd/cool is it had 2 bridge rectifiers in it, with their own heatsink... dang... that is some PSU beef if i have seen it...

thanks everell!

[Per Hansson]

Re: 1000 whats!

I see the problem
They used a Green with yellow stripe cable for +12v4
Green with yellow stripe is ground

No seriously, it has Teapos, and is very crammed...
Maybe they have lost their capacitance or ESR?
So a light load is fine but when you crank it up near a kilowatt the ripple goes out of spec?

[Toasty]

Re: 1000 whats!

All the same trafos.

This was a $250 PSU 2 years ago. Somebody put it out for trash, right...?