I have an ACA1221 accelerator (not EC). The card is clocked at 28MHz and get's VERY hot. Even when running on default 17MHz the temperature can go as high as 65'C. Is there any way to use any of the cards connectors to install some kind of fan?
The manufacturer's wiki shows that the ACA1221 provides a port to supply power to the RapidRoad USB accessory through a simple jumper cable. From the end of the third paragraph in the Clock Ports section of the ACA1221 wiki page:
For passing power to RapidRoad, the white power output of the ACA1221 can be used.
The RapidRoad's power connector is wired to be powered from either the ACA1221's power port or a standard floppy drive power plug, as stated in the final sentence of the Overview section of the RapidRoad's wiki page:
The high-current switch can supply up to 1.5A of power per port. For this high power rating, separate power must be supplied through a 3.5-inch floppy power connector.
This would imply that the power output connector of the ACA1221 shares the same pinout as a floppy drive connector and can provide at least 3 Amps of current on the 5 Volt pin, and also that the 5 Volts available on the Clock Port is not able to supply 3 Amps of current. The pinout could be easily verified using a digital multimeter.
Edit: After close inspection of a random web image of the back of the ACA1221, it appears as if I can make out a ring around the 12 Volt pin of the power connector, so at least it is not connected to the ground plane, and may very well have the 12 Volts routed through from the Zorro bus connector: