Can the Radeon 780M run gpt-oss 20B?
Yes, with 32 GB or more. gpt-oss 20B needs about 16 GB and the Radeon 780M with 32 GB of system memory leaves about 19 GB for models. Expect about 16 tok/s, about reading speed. The 16 GB version doesn't have room.
ollama run gpt-oss:20bFirst time? Install Ollama, then paste that into a terminal.
gpt-oss 20B needsAbout 16 GB
Radeon 780M has16 or 32 GB system memory
Bandwidth90 GB/s
Estimated speed~16 tok/s
By memory size
Each Radeon 780M version
- 16 GB (about 10 GB usable)Too big
- 32 GB (about 19 GB usable)Usable ~16 tok/s
Want it faster?
Speed comes from memory bandwidth: the card reads all 2 GB of active weights for every token. Cards that run gpt-oss 20B faster:
How we estimate
Speed is roughly memory bandwidth divided by the weights read per token, calibrated on our own rack. Sizes are Ollama's default 4-bit downloads plus about 1.2 GB for context. Real results are usually within about a third. Measured it yourself? Send us the number.
Keep going