I need to replace the power supply on my aging Sawtooth. I've read Mike Breeden's excellent article on how to modify a standard ATX PS for use in a Sawtooth, but my question is more about the size of the power supply.

Are all ATX power supplies standard, physically, or do they come in different sizes? That is, should any 20-pin ATX power supply fit physically into the original Sawtooth case?

Thanks.

Most power supplies are the same physical size but you need to pay attention to the AC connectors on them. Some are more centered and will be a pain if not impossible to use with a G4.

My favorite brand/model to use in G4s is the Thermaltake TR2. It is about 3/4" deeper than normal though, so if you have an original ancient optical drive, it may be a tight fit. You can choose another brand, of course, but I would recommend against anything under $30 normal price.. they're just not very reliable.


I have built adapter kits that will work with B&W G3s/Yikes/Sawtooths that are plug & play, if you're interested. The kit takes care of the motherboard connector and also provides a power connection for the Apple fan. I've been selling the kits for $12 shipped while supplies last. The adapters will work with any 20 or 24 pin power supply.

I had built those kits as a bit of expansion to my Gig-e/DA adapter project which I've almost abandoned due to unexpected quirks popping up. The Sawtooth adapters are quirk-free though, so long as you buy a reliable power supply.

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