Modder Gets Intel Core 9 273PQE "Bartlett Lake" To Boot Windows 11 on Z790 Motherboard

Key Takeaways

• Bartlett Lake CPU originally for industrial OEMs.
• Not compatible with consumer Z790 boards out‑of‑the‑box.
• Modder patched BIOS to initialize processor.
• Windows 11 boots successfully on modified system.
• Shows potential for repurposing edge CPUs in DIY builds.

Summary

A modder has successfully booted Intel’s Core 9 273PQE “Bartlett Lake” processor on a standard Z790 motherboard. The 12‑core, 24‑thread chip, originally sold only to industrial OEMs and lacking official BIOS support, previously stopped at POST. By modifying the motherboard firmware, the CPU passed initialization and loaded Windows 11.

Pulse Analysis

Intel’s Core 9 273PQE, codenamed “Bartlett Lake,” belongs to the Core 200 family built on the Intel 7 process. Unlike the hybrid Raptor Lake chips that dominate the consumer market, Bartlett Lake is a pure‑P‑core design with twelve Raptor Cove cores and no efficiency cores. Intel positioned the part exclusively for edge and embedded systems, selling it only to commercial OEMs for industrial PCs, kiosks, and AI‑accelerated workloads. Because the processor was never intended for mainstream desktops, Intel did not provide a consumer‑grade BIOS or microcode for the Z790 chipset, leaving DIY builders unable to use it.

The breakthrough came when a hobbyist reverse‑engineered the Z790 firmware and injected custom microcode that recognises the Bartlett Lake ID. By forcing the motherboard to accept the CPU during early boot, the modder bypassed the usual POST failure and allowed the system to hand off control to the operating system. After the firmware patch, Windows 11 installed and ran without crashes, proving that the lack of official support was a software barrier rather than a hardware limitation. The tweak required precise timing adjustments and voltage mapping to keep the 12‑core chip stable.

This achievement signals a shift in how enthusiasts may approach high‑end, non‑consumer silicon. If similar BIOS modifications can be replicated, edge‑grade CPUs could become a cost‑effective upgrade path for power users seeking more cores without moving to newer socket generations. Motherboard manufacturers might also see demand for more open firmware that accommodates a broader CPU spectrum, potentially driving new BIOS utilities. However, the practice remains unofficial and may void warranties, so enterprises should weigh the reliability risks before deploying such repurposed hardware.