Here for sale is a special G3 accelerator designed for use with the Power Macintosh 6100, 7100, and 8100. I believe it’s also compatible with some of the Radius clone systems. I have tested this card with my 6100 under Mac OS 8.6 and System 7.5.5 with the included driver floppy disk. Everything works as it should, and it really speeds up the system compared to a stock configuration!

Here’s some information from Sonnet:

The Sonnet Crescendo G3 220-233/512k features a 220 to 233 MHz PowerPC 750 (G3) processor (depending on system) with 512k of backside cache. Sonnet's unique "AutoConfigure" technology detects what type of computer is being used and sets the speed to the maximum safe setting. The card plugs the PDS slot and pass-through cables are available for video cards if necessary.