Used and in great working order SONNET CRESCENDO G3 400/512 (Rev. B) upgrade CPU for Apple Macintosh. The CPU has been thoroughly cleaned, is in great condition and performs with no issues.

Please note:

• The CPU will be re-tested before shipping.
• I don't accept returns or refunds due to the nature and age of vintage electronics goods.
• Item will be packaged with all necessary care.

Feel free to contact me if you have any questions. Thanks for looking!