For sale is a Sonnet Encore/ST G4 Duet 1.6GHz dual-processor upgrade card for Power Mac G4 systems with AGP graphics. This is a Sonnet upgrade card designed to replace the original CPU module and provide dual PowerPC G4 processors with active cooling.

Included:

The upgrade card is in very good cosmetic condition with no visible damage. Cooling fan spins freely. The retail box shows normal age-related wear, scuffs, and edge wear. Please review all photos carefully for exact condition.

This is vintage hardware intended for collectors and experienced users. Installation requires partial disassembly of the Power Mac G4 and familiarity with CPU upgrade procedures. System compatibility depends on the exact G4 model, firmware revision, and operating system version.


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.