RTX 5080 Hits 500W in New VBIOS Load Test, No Flashing Needed

NVIDIA GeForce RTX 50, 40 and 30 series graphics cards can now load a custom VBIOS without a traditional firmware flash, according to VideoCardz.com, which said the method was tested on an RTX 5080 pushed to 500 watts. The report describes the change as a shift away from the flash-based BIOS updates that have governed GPU firmware for most of the card's history.

Key numbers

• 500W — power draw VideoCardz says the RTX 5080 sustained during the custom-VBIOS test.
• 3 generations — RTX 50, RTX 40 and RTX 30 series cards VideoCardz lists as supported by the load method.

What did VideoCardz report about NVIDIA's VBIOS change?

VideoCardz reported that GeForce RTX 50, 40 and 30 series cards can now run a custom VBIOS — the firmware that governs clock speeds, power limits and fan curves — by loading it rather than flashing it onto the card's memory chip, per VideoCardz.com. The outlet said an RTX 5080 was used as the test case, running at 500 watts under the loaded firmware, VideoCardz reported.

An RTX 5080 sustained 500 watts under a loaded custom VBIOS, without a reflash of the card's firmware chip, according to VideoCardz.com.

The report does not specify the tool or software used to perform the load, and HTT News could not independently verify the method beyond VideoCardz's account.

What is VBIOS, and why does flashing usually carry risk?

VBIOS — short for video basic input/output system — is the firmware stored on a graphics card that sets its default clocks, voltage curves and power limits before the operating system or driver loads. Enthusiasts have long modified VBIOS files to raise power limits or unlock voltage control, but the standard method requires flashing: overwriting the firmware chip directly. A failed flash can leave a card unable to boot, sometimes permanently, which is why flashing has historically been treated as a higher-risk modification than software-level overclocking tools such as MSI Afterburner.

A load-based method, as described by VideoCardz, would let a custom VBIOS run in the card's active memory rather than being written to the chip itself — a distinction that, if accurate, would change the risk profile for cards that currently require a flash to raise power ceilings.

How was the RTX 5080's 500W test conducted?

VideoCardz's reporting ties the 500-watt figure specifically to the RTX 5080 test case, without detailing the test duration, cooling setup or whether the card's stock power limit was exceeded by a fixed margin. HTT News has not seen benchmark logs, thermal data or voltage curves beyond the wattage figure cited by VideoCardz, so the 500W number should be read as the outlet's reported test result rather than an independently confirmed sustained-load figure.

Which NVIDIA GPU generations are affected?

VideoCardz's report spans three GeForce generations — RTX 50, RTX 40 and RTX 30 series — as candidates for the load-based VBIOS method, according to the outlet. The report does not break out which specific models within each generation were tested beyond the RTX 5080, and VideoCardz did not publish a full compatibility list in the material reviewed by HTT News.

What's still unverified about this method?

Several details that typically accompany GPU firmware reports are absent from the source material: the name of the loading tool, warranty implications from NVIDIA, and whether the method persists across reboots or requires reloading each session. VideoCardz's report is the only account reviewed for this brief, and no NVIDIA statement is cited in that reporting.

What's the timeline for broader testing and verification?

• Reported: VideoCardz publishes the RTX 5080 500W test result and describes load-based VBIOS access across RTX 50, 40 and 30 series cards.
• Pending: Independent benchmarking outlets and overclocking communities have not yet published their own replication of the 500W result, based on available reporting.
• Unaddressed: NVIDIA has not issued a public response to the method in the material reviewed for this brief.

Readers tracking this story should treat the 500-watt figure and the three-generation compatibility claim as VideoCardz's reported findings pending independent confirmation.