Intel this year revealed multiple new CPU lineups. These have included the new desktop Core Ultra 200S Plus (Arrow Lake-S refresh), Ultra 200HX Plus (Arrow Lake mobile), Core Ultra series 3 (vPro) (Panther Lake for enterprises), and finally Core Ultra 200 (Bartlett Lake) and 300 (Panther Lake).
While you may already be familiar with the rest, Bartlett Lake may sound new to you. It is essentially Intel"s latest embedded CPU lineup and they have a few interesting things going for them. First, they are P-cores only, which means they do not really require any special scheduler-related help from the OS. Second, they still carry hyperthreading, which is something Intel dropped with the Lunar Lake family, and third, they are compatible with the company"s LGA1700 socket.
While that"s great, unfortunately, being an embedded part that"s aimed mostly at commercial usage, Intel has put in blocks such that it can not run on consumer LGA1700 sockets.
However, a DIY PC enthusiast over on the Overclock website forum successfully managed to bypass the blocks put in with the help of Claude AI. First, this user named kryptonfly ran their processor by tweaking the firmware to sort of support their Bartlett Lake Core 9 273PQE. This was established on an Asus Z790 motherboard
For anyone wondering, the 273PQE is a 12-core 24-thread part (since it has no E-cores and it still packs hyperthreading).
After a bit more struggle, the user got their system into Windows 11 as well by tricking the FSP-M into thinking it is a Raptor Lake SKU that"s in the socket. By doing so they were able to get the FSP-M to initialize the memory for the System Agent (Uncore) to get going.
The elated enthusiast wrote: "HISTORICAL ! We fixed the SA init by fooling the FSP-M with the Raptor lake SA/PEG init, the Raptor lake SA initializes after our Bartlett lake patches for the mem init side, no more 5F hanging and I CAN BOOT INTO WINDOWS !"
The FSP-M is the Intel Firmware Support Package that is responsible for initializing the memory on a system when booting up.
Technically, Bartlett Lake"s embedded CPU lineup is meant for Windows Servers and not for Windows 11. However, given that Server 2025 shares a lot in common with Windows 11 24H2 which in turn evolved into version 25H2, it makes sense that the Intel 273PQE was at least functional on the system. And as mentioned above, it"s a P-core only series so performance should actually be pretty consistent without the need for something like APO (Application Optimizer) for the Thread Director to work correctly.
Source and images: kryptonfly (Overclock.net) (link1, link2)