A clever PC modder has pulled off an eye-catching experiment with Intel’s newest OEM-only Bartlett Lake processor, proving just how far BIOS tinkering can go on consumer hardware. Using AI-assisted BIOS rewriting, the modder managed to get an Intel Core 9-273PQE Bartlett Lake CPU to reach the POST screen on an Asus Z790 motherboard, with the BIOS correctly identifying the chip. That alone is a notable milestone, because these processors aren’t meant to run in typical gaming PC motherboards.
The modder, who goes by “kryptonfly,” set out to see whether Bartlett Lake could be coaxed into working on the popular Z790 platform. The main obstacle is official support: standard Z790 boards don’t ship with the required microcode and firmware needed to properly initialize and run Bartlett Lake CPUs. In other words, even though the processor fits the LGA1700 socket, the software side isn’t there—at least not in any sanctioned, consumer-ready way.
To overcome that, kryptonfly reportedly used Claude to help rewrite the motherboard BIOS and inject the missing CPU microcode. According to the post, the process didn’t rely on simply swapping a module or making a small patch. Instead, the AI-assisted workflow edited the BIOS extensively while referencing information from Asus motherboards that do recognize Bartlett Lake processors in specialized workstation, industrial, and AI-focused deployments.
The result: progress, but not a complete victory. The system reached POST and displayed the proper CPU name on the BIOS splash screen, confirming that Bartlett Lake identification and initial initialization can happen on a Z790 board with the right microcode present. However, the machine still can’t boot beyond POST. After the initial screen, the setup becomes unresponsive, leading to a black screen and error behavior that suggests more low-level firmware work is still needed before the platform can actually load an operating system.
For readers wondering why this matters, it’s because the Intel Core 9-273PQE is no ordinary chip. It’s a high-end Bartlett Lake CPU aimed at workstations and AI workloads, launched only recently and kept to OEM channels rather than retail shelves. The processor features 12 performance cores and 24 threads, with a 3.4 GHz base clock and boost behavior that can reach up to 5.9 GHz on a single core, or around 5.3 GHz across all 12 cores. It also includes 36 MB of L3 cache, supports up to 192 GB of DDR5-5600 memory, and uses the LGA1700 socket—making it especially tempting for enthusiasts who already own compatible physical hardware like Z790 boards.
Still, this experiment comes with big caveats. Because the support is unofficial, future firmware updates from Intel or motherboard vendors could potentially shut down whatever path made this partial POST possible. And even if that doesn’t happen, achieving a successful POST is only one step; stable boot, correct device initialization, and long-term reliability are entirely different challenges.
For now, kryptonfly’s project stands as an intriguing proof of concept: Bartlett Lake on Z790 isn’t completely impossible, but it’s far from plug-and-play. Enthusiasts hoping to try something similar should expect a lot of trial and error—and the possibility that a later update could close the door entirely.
