GPT-OSS 20B and 120B Models on AMD Ryzen AI Processors (www.amd.com)

submitted 2 days ago by sith@lemmy.zip to c/localllama@sh.itjust.works

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[-] infinitevalence@discuss.online 4 points 2 days ago* (last edited 1 day ago)

Just ran it on my Framework 13 w/ Ryzen AI 9 HX 370. Its not able to use the NPU at all which is as expected in Linux. :(

Still getting 20 tokens/sec is not bad off the GPU/CPU and 2x what I was seeing on Gemma 3 12b.

I have a Radeon RX 9060 XT 16GB which I may try to plug in and bench too.

This is a nice uplift in performance but its still not utilizing dedicated hardware.

Ryzen AI 9 HX 370 w/ 870M + 64GB gpt-oss-20b:

 "stats": {
    "stopReason": "userStopped",
    "tokensPerSecond": 19.52169768309363,
    "numGpuLayers": -1,
    "timeToFirstTokenSec": 7.363,
    "totalTimeSec": 24.127,
    "promptTokensCount": 1389,
    "predictedTokensCount": 471,
    "totalTokensCount": 1860

Ryzen 9 3900x w/ RX 9060 XT 16GB + 128GB gpt-oss-20b

"stats": {
    "stopReason": "eosFound",
    "tokensPerSecond": 21.621644364467713,
    "numGpuLayers": -1,
    "timeToFirstTokenSec": 0.365,
    "totalTimeSec": 15.124,
    "promptTokensCount": 118,
    "predictedTokensCount": 327,
    "totalTokensCount": 445

Ryzen AI 9 HX 370 w/ 870M + 64GB gemma-3-12b

 "stats": {
    "stopReason": "eosFound",
    "tokensPerSecond": 7.866126447290582,
    "numGpuLayers": -1,
    "timeToFirstTokenSec": 12.937,
    "totalTimeSec": 12.458,
    "promptTokensCount": 1366,
    "predictedTokensCount": 98,
    "totalTokensCount": 1464

Ryzen 9 3900x w/ RX 9060 XT 16GB + 128GB gemma-3-12b

"stats": {
    "stopReason": "eosFound",
    "tokensPerSecond": 27.62905167372976,
    "numGpuLayers": -1,
    "timeToFirstTokenSec": 0.31,
    "totalTimeSec": 19.219,
    "promptTokensCount": 2975,
    "predictedTokensCount": 531,
    "totalTokensCount": 3506

[-] hendrik@palaver.p3x.de 1 points 2 days ago* (last edited 2 days ago)

Thanks for the numbers. Btw, I think a NPU can't run large language models in the first place. They're meant for things like blur the background in video conferences, or help with speech recognition or such very specific smaller tasks. They only have some tens or hundreds of megabytes of memory, so a LLM/chatbot won't fit. The main thing that makes LLM inference faster is memory (RAM) bandwith and speed.

[-] infinitevalence@discuss.online 2 points 1 day ago

I added a few more numbers. I may pull my old MI25 out of mothballs and bench that to.

this post was submitted on 14 Aug 2025

15 points (100.0% liked)

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