SFX Power

My project with Blizzard PPC and BVision moves forward and the next challange was to get more power to the Amiga 1200. A normal Amiga 1200 with average expansions will be good with 3.5A standard PSU but when it is expanded with both the above cards, it is recommended to have 8-10A. Many examples that I’ve seen has used a standard ATX PSU but this is too easy 🙂 I wanted the solution to be as close to original as possible so I could keep the retro-feeling.

Rumors on forums said that SFX form factor PSU would fit without any problems inside a A500 PSU without any special modifications needed.

Finding a good candidate

As the topic says, next step was to find a good candidate that I would use for my project. Did some reading on forums and talked to some of my friends that found that a SFX PSU from FSP would be more that good enough. The PSU model that was selected at last was a FSP300-60GHS(85) which is a 300W PSU with the dimension of 100mm (L) x 125mm (W) x 63,5mm (H) and also complies to the 80PLUS Bronze certification.

The total output is as the table below.

sfx-table

Even if the output power is more than good enough, the length of the outgoing cables was a bit too long and combined with a smaller area on the cable, it would not be able to keep 5V+ stable. An easy solution for this was to more or less just shorten the cable to about 40-50cm. There are plenty of homepages out there that helps you calculate the drop, you can find one example here.

The result

Well, can’t complain. Even with if I kept the fan inside the small case it does only have a very low humming sounds. The size was perfect and I had no problems what so ever to mount it inside a A500 PSU.

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