For sale is a rare Sonnet Crescendo/ZIF G4 processor upgrade card for compatible Apple Power Macintosh G3 and G4 ZIF systems.
This is the 800MHz G4 version with 1MB cache. The outer box is the Japanese retail Sonnet Crescendo/ZIF G4 package.
According to the Sonnet retail box and included documentation, this Crescendo/ZIF G4 upgrade is intended for compatible ZIF-based Power Macintosh models including the Power Macintosh G3 Desktop, G3 Minitower, G3 Blue & White, and Power Mac G4 PCI Graphics systems.
Included are the Sonnet Crescendo/ZIF G4 800MHz upgrade card, original Japanese Sonnet retail box, Sonnet installer CD, Sonnet's "Simply Fast" sticker, and power adapter cable, as shown in the photos.
Please note that installation and use may require compatible system firmware, compatible Mac OS / Mac OS X versions, Sonnet software, correct cooling, and vintage Macintosh troubleshooting knowledge. Compatibility is not guaranteed for every configuration, so please make sure this upgrade is suitable for your specific system before purchase.Fast and careful shipping from Tokyo, Japan.Please be aware of any customs import duties or taxes in your country.
🇺🇸 US buyers: shipments are sent DDP (Delivered Duty Paid), which means there are no duty fees on delivery, as duties are included in the shipping rate.
Please also note that customs delays may occur, particularly within the EU.
This is vintage hardware/software for vintage computers. Use of this item requires era-appropriate knowledge and compatible hardware/software. Please carefully verify your intended use and compatibility before purchasing. I am happy to answer reasonable questions, but compatibility with every system or configuration cannot be guaranteed, and step-by-step installation support is not provided. Issues arising from incorrect installation, modification, or incompatible use are outside the seller’s responsibility.
I usually ship within 24 hours. If shipping falls on a Saturday in Japan, dispatch may occur the following Monday.