crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

Good luck, I can only find where only the 1 GHz board will work in your machine:

Part Number: 661-2823, 661-2823-R

Model: 820-1502-A

crwdns2915684:0crwdne2915684:0:

open