2.2 KiB
GDDR6/GDDR6X GPU Memory Temperature Reader for Linux
Reads GDDR6/GDDR6X VRAM memory temperatures from multiple supported NVIDIA GPUs found in a host Linux system. These findings are based on reverse engineering of the NVIDIA GPU Linux driver.
Experimental: RTX 5090 (GDDR7)
Experimental support for the RTX 5090 (Blackwell / GB202, GDDR7) is included. It reads the per-module DRAM sensors directly and reports the hotspot (hottest module) by default:
sudo gddr6 # VRAM hotspot temperature
sudo gddr6 --per-module # each of the 8 GDDR7 modules separately
This is reverse-engineered and unofficial (NVIDIA does not expose memory temperature via nvidia-smi/NVML on this card) — treat the readings as approximate.
For a dedicated Blackwell app with a TUI (plus ASCII/JSON output) and a reusable C library, see gpuwatch.
Prerequisites
- Kernel boot parameter: iomem=relaxed
This step is optional. In some Linux distributions, the default kernel boot parameters are sufficient to run this program.
sudo vim /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iomem=relaxed"
sudo update-grub
sudo reboot
- Disabling Secure Boot
This can be done in the UEFI/BIOS configuration or using mokutil:
mokutil --disable-validation
Check state with:
$ sudo mokutil --sb
SecureBoot disabled
Dependencies
- libpci-dev
sudo apt install libpci-dev -y
Installation (cmake)
git clone https://github.com/olealgoritme/gddr6
cd gddr6
./build_install.sh
sudo gddr6
Supported GPUs
- RTX 5090 (GB202) — GDDR7, experimental (see above)
- RTX 4090 (AD102)
- RTX 4080 Super (AD103)
- RTX 4080 (AD103)
- RTX 4070 Ti Super (AD103)
- RTX 4070 Ti (AD104)
- RTX 4070 Super (AD104)
- RTX 4070 (AD104)
- RTX 4060 Max-Q / Mobile (AD107)
- RTX 3090 Ti (GA102)
- RTX 3090 (GA102)
- RTX 3080 Ti (GA102)
- RTX 3080 (GA102)
- RTX 3080 LHR (GA102)
- RTX 3070 (GA104)
- RTX 3070 LHR (GA104)
- RTX A2000 (GA106)
- RTX A4500 (GA102)
- RTX A5000 (GA102)
- RTX A6000 (AD102)
- L4 (AD104)
- L40S (AD102)
- A10 (GA102)
