For sale is a PowerLeap PL-370/T Socket 370 CPU upgrade adapter / interposer for Tualatin-core Pentium III and Celeron processors.

This is the Socket 370-to-Socket 370 version of PowerLeap’s Tualatin adapter, not the Slot 1 PL-iP3/T. The adapter is marked PowerLeap PL-370/T V1.0.

The PL-370/T was designed to allow Tualatin-core Socket 370 processors to be used on certain older Socket 370 motherboards that do not natively support Tualatin CPUs. It is intended for advanced retro PC upgrade projects and compatibility depends heavily on the exact motherboard, BIOS, chipset, voltage support, and CPU used.

Included are the PowerLeap PL-370/T adapter, heatsink/fan assembly, power cable, thermal compound, utility diskette, printed guide, and original box, as shown in the photos.

The outer box shows age-related storage wear, scuffs, creases, discoloration, and general wear. The adapter and included parts appear clean overall, but this is vintage PC upgrade hardware and has not been tested in every possible motherboard/CPU combination.

Please confirm compatibility with your exact motherboard and CPU before purchase. Installation may require BIOS updates, manual voltage/FSB settings, correct cooling, and advanced troubleshooting knowledge.

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.