http://www.digit-life.com/articles2/mainboard/ecs-sima-a9s-sis756.html"ECS PF88 Extreme Hybrid is quite an unusual and controversial product. On the one hand, we should do justice to ECS engineers, who implemented the idea to support completely different processors."
There is an ECS PF-88 motherboard with CPU cards that can be used with either Intel or AMD CPU.
I do not know if it is possible to create a special PF-88 CPU cards for PowerPC.