Question concerning power supply units

  • Thread starter Thread starter Decay
  • Start date Start date
The firewire 1394 standard specifies that the six pin connector be able to supply up to 45 watts of power.

As this could be almost 25% of your total rated supply output, I would HIGHLY recommend you upgrade your supply, or if that's not possible simply run the outboard device with external power supply connected at all times.
 
Decay said:
Will a 200W mini PSU such as the one found in this shuttle http://eu.shuttle.com/en/DesktopDef...ory-289/noblendout-1/tabid-72/170_read-11795/
deliever sufficient power to run bus powered audio interfaces with preamps and phantom power (I'm mainly thinking about the firepod and the Motu Ultralite)?
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No. I know that the small form factor is appealing, but you are asking for grief with that tiny PSU. If you want a small portable box with a good PSU look at this one.
 
Kiauma said:
The firewire 1394 standard specifies that the six pin connector be able to supply up to 45 watts of power.
Click to expand...

Not true. The FW standard specifies that the 6-pin cable be capable of handling 45W of power. That is the maximum that an interface is allowed to provide. Most FireWire interfaces on desktop machines provide on the order of 15-20W, and laptops typically provide on the order of 7W.
 
Ok, thanks people. It seems as if I might have to go with a bigger PSU, then.

dgatwood said:
Not true. The FW standard specifies that the 6-pin cable be capable of handling 45W of power. That is the maximum that an interface is allowed to provide. Most FireWire interfaces on desktop machines provide on the order of 15-20W, and laptops typically provide on the order of 7W.
Click to expand...

But you still reckon a 200W PSU would be a bit slim for a home studio PC?
 
Decay said:
But you still reckon a 200W PSU would be a bit slim for a home studio PC?
Click to expand...

200W is too small for my ten-year-old baby server box with two hard drives. It's -way- too small for a modern workstation.

To calculate your power budget, add up the following:

1. CPU consumption * 1.4
2. motherboard consumption
3. hard drive consumption * 3
4. 150W for your GPU (to accommodate an upcoming PCIe spec)
5. 75W * 3 extra slots

This points to a minimum of about 500-600W. My current machine has 1kW. 200W... yeah, that's way, way, way too small.
 
Where in the world do even FIND a 1KW power supply??

I am currently using a 550 watt supply - but I have a dual proc, dual HDD system...
 
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