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  • DC-DC power questions!

    I have a 9V VGA Splitter that runs on a car adapter to convert 12V to regulated 9V. I have decided to upgrade to 8 screens so I need another VGA Splitter in order to get that done. Currently the requirements of the splitter are 9V at 800ma. The adapter I am using is 9V at 2000ma. would it be safe to power both VGA splitters from this one DC-DC adapter?
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  • #2
    So you have two splitters which each require 800ma. 2x800=1600 1600 is less than 2000, so you should be good to go.

    The only issue I can see is depending on where you're getting the current readings from.
    This depends on whether the adapter uses 800ma at 9 volts or at 12 volts depending on what side of the adapter the label is talking about.

    Let me do the math... alright, either way you're good. That adapter gives you plenty of power for both of these.
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    • #3
      Originally posted by PaulF View Post
      So you have two splitters which each require 800ma. 2x800=1600 1600 is less than 2000, so you should be good to go.

      The only issue I can see is depending on where you're getting the current readings from.
      This depends on whether the adapter uses 800ma at 9 volts or at 12 volts depending on what side of the adapter the label is talking about.

      Let me do the math... alright, either way you're good. That adapter gives you plenty of power for both of these.
      Im getting them directly from the wall adapter, it says output 9V 800ma. I have to assume they actually use less and that the rating on the adapter is the maximum it could use. On the stupid AC splitter I had, the adapter said 9V 600ma, but under the specs for the device itself, It said the device uses 300ma max and 30ma idle, something like that.
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      • #4
        The specs that are actually on the device are the ones you want to go with. If it's only drawing 300ma you you'll definitely be fine.
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        • #5
          Originally posted by PaulF View Post
          The specs that are actually on the device are the ones you want to go with. If it's only drawing 300ma you you'll definitely be fine.
          Thanx for your help.... Its also great to see another AMD user on the forums!
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          • #6
            Originally posted by HiJackZX1 View Post
            Thanx for your help.... Its also great to see another AMD user on the forums!
            AMD is the way to go, way cheaper for the performance you get.


            For future reference with power adapters, just remember that you can power any number of devices on one power adapter assuming that the total amperage required by all the devices adds up to less than the power supply's output.
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