NVIDIA GPU BIOS flashing bypasses restrictions for any GPU.


August 21, 2023

. Software engineers and modders have developed tools to bypass NVIDIA's BIOS signature lock, allowing for firmware updates and customization on a wide range of GeForce GPUs, unlocking endless possibilities for performance enhancements.

  • Bypasses NVIDIA's BIOS mismatch restrictions
  • Enables firmware updates on a wide range of GeForce GPUs
  • Allows for SubSystem Vendor to Vendor crossflash


nVidia BIOSes Unlocked: Expanding Possibilities for Geforce GPUs

In a recent report from TechPowerUP, software engineers and modders have made a breakthrough in bypassing NVIDIA’s BIOS mismatch restrictions. Through the discovery of a backdoor, developer Kefi has successfully identified a “mismatch bypass” in NVIDIA’s firmware flashing tool. This breakthrough allows for firmware updates on a wide range of GeForce GPUs, opening up endless possibilities for customization and performance enhancements.

For years, NVIDIA’s BIOS signature lock has prevented alterations to firmware with the help of an on-die security chip called Falcon. However, Kefi and Veii, the creator of OMGVflash, have developed tools that effortlessly bypass these limitations. These tools completely eliminate the need for BIOS signature checks, enabling cross-flashing of firmware without any restrictions.

OMGflash, one of these tools, offers full crossflash ability from Turing (RTX 2xxx Series) down to GeForce GPUs. It also allows for SubSystem Vendor to Vendor crossflash, as long as power headers are identical (applies to 3000-4000 series). The tool can downgrade InfoROM and XUSB FW to remove SW EEPROM lockdown, making it suitable for situations with dGPUs on Laptops or similar setups. As long as the 32-bit and 8-bit checksum on usermod is correct, users can flash and bypass FE/VendorCert/XOC Cert/MasterCert, giving them the freedom to customize their GPUs as desired.

One notable application of this software is its ability to empower gamers to flash the 1.1V BIOS onto their RTX 4090 GPUs. Initially reserved for early RTX 4090 production models, this BIOS configuration offers enhanced performance through more aggressive voltage and frequency settings. However, with the introduction of the AD102-301 GPU, the maximum voltage has been limited to 1070mV. Without the use of this tool, flashing such BIOS versions would be impossible. Additionally, gamers can now explore flashing overclocked (OC) BIOS versions onto cards that originally shipped with default NVIDIA clock settings.

It is important to note that using this software carries a significant level of risk and may result in premature GPU failure. Therefore, it is strongly recommended that users only attempt these modifications on GPUs equipped with dual-BIOS functionality, if available.

For more information and direct access to the software, please refer to the original report on TechPowerUP.

This article is based on information by Videocardz.com

Background Information


About nVidia: NVIDIA has firmly established itself as a leader in the realm of client computing, continuously pushing the boundaries of innovation in graphics and AI technologies. With a deep commitment to enhancing user experiences, NVIDIA's client computing business focuses on delivering solutions that power everything from gaming and creative workloads to enterprise applications. for its GeForce graphics cards, the company has redefined high-performance gaming, setting industry standards for realistic visuals, fluid frame rates, and immersive experiences. Complementing its gaming expertise, NVIDIA's Quadro and NVIDIA RTX graphics cards cater to professionals in design, content creation, and scientific fields, enabling real-time ray tracing and AI-driven workflows that elevate productivity and creativity to unprecedented heights. By seamlessly integrating graphics, AI, and software, NVIDIA continues to shape the landscape of client computing, fostering innovation and immersive interactions in a rapidly evolving digital world.

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