This is the 466MHz replacement CPU card for Wallstreet powerbooks. Worked great and provided a very noticable speed boost in my 266MHz Wallstreet. (CocoaBench scored it higher than my PBG4/400 and it felt faster.)
FAQ
http://www.powerlogix.com/support2/f...sls/index.html
Product Manual
http://www.powerlogix.com/downloads/WS_RevG_qk.pdf
The specs say that 192M is the max supported Memory. I was able to get it to boot with a 256 in the top and bottom slots (512M total) but it was terribly unstable. Replacing the 256 in the lower slot with a 64M module fixed any stability problems that I had. (This was under 10.1 - I also ran 10.2 without any problems.)
$250.-- Buyer pays shipping, no Paypal.