90 lines
2.2 KiB
Markdown
90 lines
2.2 KiB
Markdown
## GDDR6/GDDR6X GPU Memory Temperature Reader for Linux
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Reads GDDR6/GDDR6X VRAM memory temperatures from multiple supported NVIDIA GPUs found in a host Linux system.
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These findings are based on reverse engineering of the NVIDIA GPU Linux driver.
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### Experimental: RTX 5090 (GDDR7)
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Experimental support for the RTX 5090 (Blackwell / GB202, GDDR7) is included. It reads the per-module
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DRAM sensors directly and reports the hotspot (hottest module) by default:
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```
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sudo gddr6 # VRAM hotspot temperature
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sudo gddr6 --per-module # each of the 8 GDDR7 modules separately
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```
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This is reverse-engineered and unofficial (NVIDIA does not expose memory temperature via nvidia-smi/NVML
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on this card) — treat the readings as approximate.
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For a dedicated Blackwell app with a TUI (plus ASCII/JSON output) and a reusable C library, see
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[**gpuwatch**](https://github.com/olealgoritme/gpuwatch).
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## Prerequisites
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- Kernel boot parameter: iomem=relaxed
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This step is optional. In some Linux distributions, the default kernel boot parameters are sufficient to run this program.
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```
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sudo vim /etc/default/grub
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GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iomem=relaxed"
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sudo update-grub
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sudo reboot
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```
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- Disabling Secure Boot
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This can be done in the UEFI/BIOS configuration or using [mokutil](https://wiki.debian.org/SecureBoot#Disabling.2Fre-enabling_Secure_Boot):
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```
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mokutil --disable-validation
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```
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Check state with:
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```
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$ sudo mokutil --sb
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SecureBoot disabled
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```
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## Dependencies
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- libpci-dev
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```
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sudo apt install libpci-dev -y
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```
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## Installation (cmake)
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```
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git clone https://github.com/olealgoritme/gddr6
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cd gddr6
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./build_install.sh
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sudo gddr6
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```
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## Supported GPUs
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- RTX 5090 (GB202) — GDDR7, experimental (see above)
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- RTX 4090 (AD102)
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- RTX 4080 Super (AD103)
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- RTX 4080 (AD103)
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- RTX 4070 Ti Super (AD103)
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- RTX 4070 Ti (AD104)
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- RTX 4070 Super (AD104)
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- RTX 4070 (AD104)
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- RTX 4060 Max-Q / Mobile (AD107)
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- RTX 3090 Ti (GA102)
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- RTX 3090 (GA102)
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- RTX 3080 Ti (GA102)
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- RTX 3080 (GA102)
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- RTX 3080 LHR (GA102)
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- RTX 3070 (GA104)
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- RTX 3070 LHR (GA104)
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- RTX A2000 (GA106)
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- RTX A4500 (GA102)
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- RTX A5000 (GA102)
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- RTX A6000 (AD102)
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- L4 (AD104)
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- L40S (AD102)
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- A10 (GA102)
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