Re: PSU versions
- From: "news.news" <cyber@xxxxxxxxxxxx>
- Date: Sun, 20 Nov 2005 11:43:55 +0800
Hi,
Any Ideal since went (or what type of monther board) do not required -5V.
I have a old P3 600Mhz. Recently I replace with new power supply, also
notice the -5V pin is no more there. It works fine.
"Paul" <nospam@xxxxxxxxxx> wrote in message
news:nospam-1911051817230001@xxxxxxxxxxxxxxxx
> In article <alqun151stkv37fiqc3hhe81upm7gei8u5@xxxxxxx>, Ken Palmateer
> <kenpalmateer@xxxxxxxxxxxx> wrote:
>
>> Hey Folks:
>> Can anyone tell me the importance (if any) of the various
>> versions of the power supplies, eg 1.3 or version 2? I will be using
>> an Asus SLI motherboard with socket 939. Does it matter if I get a
>> PSU with 1.3, for instance? Ken
>
> The differences in ATX power supplies that come to mind:
>
> 1) Initial ATX had 20 pins and no 12V processor power connector.
> May have also had a 1x6 connector, that had extra 3.3V amongst
> other things on it. Perhaps that was added slightly later than
> the initial 20 pin output ?
>
> 2) Added the 2x2 square 12V connector for P4 boards (and later
> some AthlonXP and Athlon64 boards).
>
> 3) Changed connector to 24 pins, to help with powering PCI
> Express slots. Removed -5V due to it being obsolete and
> not really necessary on a motherboard. Pin is replaced
> by "reserved", so nothing gets burnt. Split the 12V output
> into 12V1 and 12V2, which was done to meet the requirement
> that no output have more than X watts of power on the output
> (some kind of fire safety requirement?). One of those outputs
> is used for the 2x2 processor connector, and the other output
> supplies motherboard and peripheral 12V requirements.
> (Note: Motherboard voltage monitor, only monitors one of
> the two 12V signals. The other is unmonitored.)
>
> You can use just a 20 pin connector, provided the PCI Express
> video card(s) plus the fan headers on the motherboard use
> no more than 6 amps. That basically means one video card plus
> fans (as the worst video card I can find data for, is 4 amps
> on +12V).
>
> By plugging in the EZplug molex connector, the room for current
> to flow increases to 6+8=14 amps. Which is enough for two video
> cards.
>
> Alternately, if using a 24 pin main connector, which has two
> 12V pins on it, the room for +12V currents to flow is 6+6=12amps.
> Using the EZplug in this situation, is beneficial due to the
> close proximity of the EZplug to the two video cards.
>
> So, from a wiring perspective, if you use one video card, virtually
> any wiring configuration will work, and more wires are better.
>
> And once the wiring requirements have been met, the current output
> rating on the label on the side of the supply, has to be sufficient
> to meet the requirements of the load. You can get estimates for
> the current needed here:
>
> http://takaman.jp/D/?english
>
> The tool will give a total +12V current needed, and if using an
> ATX supply with 12V1/12V2 split output, you need to split the
> results from the Takaman web page, into a processor only number,
> and a number for the remaining current.
>
> In terms of the various standards, I'd like to be more precise
> about the evolution of the standards, but the formfactors.org
> web site doesn't keep all the old versions in their download
> table, and their document file naming scheme is nuts.
>
> HTH,
> Paul
.
- Follow-Ups:
- Re: PSU versions
- From: Roger Hamlett
- Re: PSU versions
- From: Paul
- Re: PSU versions
- References:
- PSU versions
- From: Ken Palmateer
- Re: PSU versions
- From: Paul
- PSU versions
- Prev by Date: Re: Where is BIOS 1.009 ?
- Next by Date: Rebuild Raid 1 after drive failure
- Previous by thread: Re: PSU versions
- Next by thread: Re: PSU versions
- Index(es):
Relevant Pages
|
