No I don't own the Aptiva anymore. It fell down some stairs during transport and was damaged beyond repair. I salvaged the CPU, memory, cache, and other parts, but the frame itself was warped. So to the scrapyard it went. Too bad, since I got the computer for free when I purchased two Compaq Ipaq computers from somebody in the city where I live. The guy worked for Cisco, and he had a pretty impressive network installation at home. Enough hardware for a small business. Anyway, he sold me the two Ipaq's (60 Euros total) and then threw in the Aptiva and a Pentium 75 computer in for free. I wanted to use the Aptiva for a mod, but soon gave up that idea since the case was so different.
I still have the COAST cache chip. (256 Kb, asynchronous). If you can put it to use in your Aptiva, I'll be happy to send it to you. Don't know whether it will fit your particular board thigh, IBM made an alarming number of different versions.
SGI machines: "wtmc04"