I might be in need of a similar modification for my QS02 soon, which
is why I was researching the same thing. From what I read, the later
towers (certainly the QS & MDDs, not sure about earlier systems like
the DA and GbE) definitely REQUIRE at least 12v on that pin to boot
and even during sleep (which is why a PSU with 12V Standby power is
needed) BUT don't need the whole +25V that the original PSU provided
without an ADC-powered display connected. The only thing that
concerns me a little is whether the 12VSB line carries sufficient
amperage to use powered firewire devices (I'm certainly not about to
start syncing my iPod over USB1 and I have no usable PCI slots for a
2.0 card). I believe they will though, as the 12VSB line on those
Skyhawk ATX supplies is designed with the purpose of allowing optical
drives to be powered while the computer is off or in standby for
music playback. Working on the theory that the average optical drive
can draw ~20W on the +12v rail, that means there would have to be
sufficient power for most devices I could hook up. I hope.
But I don't need to do the mod unless the stock 344W PSU can't cope
with the reflashed 6800 Ultra and 2 7200RPM HDs I already have in the
machine in addition to the dual CPU upgrade card ;)
Jason Mayfield-Lewis
[EMAIL PROTECTED]
If freedom is outlawed, only outlaws will be free.
On 30 Dec 2005, at 12:19 AM, [EMAIL PROTECTED] wrote:
I hear the consensus is that the Gigabit and later models do
not require
the 28V unless using ADC or powered FireWire devices. But, has anyone
verified this? If not, I will be verifying this within the next 2
weeks. If it will
work, I will exclude a 24V external power supply from an order I am
about to
place.
Chris P
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