Leaked 2500W XOC BIOS for MSI RTX 5090 Lightning Z Surfaces Online

A leaked 2500W XOC BIOS for the MSI GeForce RTX 5090 Lightning Z has surfaced online, and enthusiasts are already flashing it onto non-MSI RTX 5090 GPUs. The move removes nearly all power limits, but it dramatically increases hardware risk.

Extreme BIOS Targets MSI’s Flagship Overclocking Card

According to Wccftech, the leaked BIOS unlocks a staggering 2500W power ceiling. Most RTX 5090 models ship with a rated power draw of around 600W, making this firmware far beyond typical specifications.

The Lightning Z was built for extreme overclocking from the start. MSI officially supports up to 1000W via its Extreme profile, and earlier leaks included 800W and 1000W BIOS files. Even those pushed the card well beyond standard limits. The new 2500W BIOS goes much further.

Dual 12V-2×6 vs Single Connector Risk

The MSI GeForce RTX 5090 Lightning Z features dual 12V-2×6 power connectors. Most other RTX 5090 cards rely on a single 16-pin connector.

Flashing a 2500W BIOS onto single-connector models significantly increases electrical and thermal stress. The 12V-2×6 connector has previously been linked to melting incidents under high load, and removing stock power limits raises the chance of overheating even more.

Shunt mods and modded BIOS files eliminate built-in safeguards. That exposes the connector, VRMs, and GPU silicon to extreme current and voltage levels.

Damage Reports Already Surfacing

The risks are not theoretical. One user reportedly broke an MSI RTX 5090 Lightning Z while testing this extreme BIOS. Excessive voltage and thermal stress can damage not only the connector, but also memory modules, power stages, and the GPU die itself.

Real-world performance gains remain unclear. Users have just started testing the 2500W BIOS on non-Lightning Z cards, and it is uncertain whether it delivers meaningful improvements over 800W or 1000W profiles.

We already saw enthusiasts experimenting with ASUS Matrix vBIOS on RTX 5090 cards. Extreme overclockers often accept hardware risk in exchange for marginal benchmark gains, but keep in mind that some RTX 5090 units reportedly caught fire even without aggressive overclocking, which makes a 2500W BIOS especially concerning.

At this point, the 2500W XOC BIOS represents an extreme experiment rather than a practical upgrade. Whether the performance gains justify the risk remains highly questionable.