AMDGPU driver for Linux 6.7 enforces lower power limits from vBIOS
Starting with Linux kernel 6.7, users of the AMDGPU driver are not be able to set power limits below the recommended values advised by the AMD Engineering team on the hardware itself. The new low-power limits are intentionally enforced and set based on each card vBIOS specification.
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Potentially dangerous efficiency tweak removed by an AMD Linux driver update
AMD is a beacon for overclockers on Linux, with tons of options when it comes to setting clock speeds and power limits. But this will change, as AMD has added a lower power limit on each Radeon GPU for Linux 6.7, cautioning users that not having the limit could damage or even break the hardware.
Mario Limonciello, a principal member of AMD’s technical staff, confirmed this change in a bug report. “This has been discussed on the amd-gfx M/L, and the conclusion was that under-powering outside of the bounding box is potentially dangerous and might damage the hardware. This won’t be added back in,” Limonciello stated. The lower power limit has been set and is programmed into the vBIOS, meaning there’s no way users can remove the limit.
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AMD Implements a Cap On Radeon GPUs Power Limits In Linux With New AMDGPU Driver Update
Linux is known as the grazing land for overclocking enthusiasts and GPU testers since the platform provide countless opportunities to give them an open hand when it comes to setting power limits and clock speeds. However, Team Red now plans on putting this to a halt, as with the new Linux 6.7, a lower power limit has been set by AMD, which is programmed into the vBIOS, which means that users will be forced to put the specified limit of power draw if they are initially below it.