1. 200W User
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## Beginner question(s)..

I was wondering why in a PSU you need a better primary side when operating in NA voltages (120V) compared to EU voltages (240v)?

2. Because lower voltage means higher current.

W / V = I

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Originally Posted by jonnyGURU
Because lower voltage means higher current.

W / V = I
Thanks, just still learning.. I'm going to use this thread if I have any more questions.

4. Originally Posted by jonnyGURU
Because lower voltage means higher current.

W / V = I

P = I V

it might be argued that P is a better symbol for power than W (which is more suggestive of work)

5. Originally Posted by ashiekh
P = I V

it might be argued that P is a better symbol for power than W (which is more suggestive of work)
Sure.

But for OP, we also want to change the order.

P / V = I

Since we're explaining that lower voltage results in higher current at the same wattage.

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Another question. What is MagAmps in layman terms and how much worse is it compared to dc to dc?
Last edited by faircomposer15; 04-04-2019 at 06:25 PM.

7. Mag Amp is short for Magnetic Amplifiers.

I think what you're asking is how bad is group regulation vs. DC to DC for the minor rails (3.3 and 5V)?

8. Originally Posted by jonnyGURU
Mag Amp is short for Magnetic Amplifiers.

I think what you're asking is how bad is group regulation vs. DC to DC for the minor rails (3.3 and 5V)?
He could be referring to dual MagAmp like in the S12III 450/500w

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Originally Posted by awesomegamer919
He could be referring to dual MagAmp like in the S12III 450/500w
Yea I am talking about those dual magamps, how do DC to DC and that contrast?

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