There have been rumors about Microsoft debuting Windows Core OS next week at its Surface hardware event on October 2, potentially on foldable devices codenamed Centaurus and Pegasus. Now, a Geekbench listing has appeared that shows Core OS running a mysterious Intel Lakefield processor. Have we just seen the first sight of Microsoft's return to mobile devices?

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The run-up to the next Surface hardware event has been characterised by several tips and leaks about upcoming devices and their configurations. Now, a Geekbench listing has appeared online, which claims to have been run on Windows Core System (64-bit), better known as Windows Core OS.

Spotted by @InstLatX64, the listing reports having been run on a GenuineIntel Family 6 Model 138 Stepping 1, a penta-core processor about which we cannot find any other reference online. The extended Geekbench report demonstrates that the CPU, which @InstLatX64 asserts is based on Intel's Lakefield microarchitecture, has 4 MB of L3 cache. Lakefield is the only penta-core series of which we are aware, which would mean that this mysterious Intel 0000 CPU has 1x Sunny Cove big core and 4x Tremont LITTLE cores running on between a 5 W and 7 W TDP.

Geekbench also claims to have been run on a virtual machine, masking the capabilities of the processor somewhat. Hence, we can likely dismiss these poor benchmark scores.