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Gemma 3 QAT Models: Bringing AI to Consumer GPUs

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Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#261
post #2

Available on ollama: https://ollama.com/library/gemma3

How many times do I have to say this? Ollama, llamacpp, and many other projects are slower than vLLM/sglang. vLLM is a much superior inference engine and is fully supported by the only LLM frontends that matter (sillytavern). The community getting obsessed with Ollama has done huge damage to the field, as it's ineffecient compared to vLLM. Many people can get far more tok/s than they think they could if only they kne…

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Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#262

Earlier quoted context omitted.

MLX is slower than GGUFs on Macs. On my M1 Max macbook pro, the GGUF version bartowski/google_gemma-3-27b-it-qat-GGUF is 15.6gb and runs at 17tok/sec, whereas mlx-community/gemma-3-27b-it-qat-4bit is 16.8gb and runs at 15tok/sec. Note that both of these are the new QAT 4bit quants.

No, in general mlx versions are always faster, ice tested most of them.

What TPS difference are you getting?

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#263
post #260
post #45

I think gemma-3-27b-it-qat-4bit is my new favorite local model - or at least it's right up there with Mistral Small 3.1 24B. I've been trying it on an M2 64GB via both Ollama and MLX. It's very, very good, and it only uses ~22Gb (via Ollama) or ~15GB (MLX) leaving plenty of memory for running other apps. Some notes here: https://simonwillison.net/2025/Apr/19/gemma-3-qat-models/ Last night I had it write me a complete…

Do many consumer GPUs have >20 gigabytes RAM? That sounds like a lot to me

I don't think so, but Apple's unified memory architecture makes it a possibility for people with Macbook Pros.

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#265

nice, loving the push with local models lately - always makes me wonder though, you think privacy wins out over speed and convenience in the long run or people just stick with what's quickest?

Speed and convenience will definitely win for most people. Hosted LLMs are so cheap these days, and are massively more capable than anything you can fit on even a very beefy ($4,000+) consumer machine.

The privacy concerns are honestly mostly imaginary at this point, too. Plenty of hosted LLM vendors will promise not to train on your data. The bigger threat is if they themselves log data and then have a security incident, but honestly the risk that your own personal machine gets stolen or hacked is a lot higher than that.

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#266

? Am I missing something? These have been out for a while; if you follow the HF link you can see, for example, the 27b quant has been downloaded from HF 64,000 times over the last 10 days. Is there something more to this, or is just a follow up blog post? (is it just that ollama finally has partial (no images right?) support? Or something else?)

Ollama has had vision support for Gemma3 since it came out. The implementation is not based on llama.cpp's version.

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#267
post #233

Earlier quoted context omitted.

What's MoE?

Mixture of experts like other guy said - everything gets loaded into mem but not every byte is needed to generate a token (unlike classic LLMs like gemma). So for devices that have lots of mem but weaker processing power it can get you similar output quality but faster. So tends to do better on CPU and APU like setups

I'm not even sure they're loading everything into memory for MoE; maybe they can get away with only the relevant experts being paged in.

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#268
post #45

I think gemma-3-27b-it-qat-4bit is my new favorite local model - or at least it's right up there with Mistral Small 3.1 24B. I've been trying it on an M2 64GB via both Ollama and MLX. It's very, very good, and it only uses ~22Gb (via Ollama) or ~15GB (MLX) leaving plenty of memory for running other apps. Some notes here: https://simonwillison.net/2025/Apr/19/gemma-3-qat-models/ Last night I had it write me a complete…

> and it only uses ~22Gb (via Ollama) or ~15GB (MLX) Why is the memory use different? Are you using different context size in both set-ups?

The vision tower is 7GB, so I was wondering if you were loading it without vision?

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#269
post #213

Earlier quoted context omitted.

How can you be sure that AWS will not use your data to train their models? They got enormous data, probably most data in the world.

Being caught doing they would be wildly harmful to their business - billions of dollars harmful, especially given the contracts they sign with their customers. The brand damage would be unimaginably expensive too. There is no world in which training on customer data without permission would be worth it for AWS. Your data really isn't that useful anyway.

> Your data really isn't that useful anyway

? One single random document, maybe, but as an aggregate, I understood some parties were trying to scrape indiscriminately - the "big data" way. And if some of that input is sensitive, and is stored somewhere in the NN, it may come out in an output - in theory...

Actually I never researched the details of the potential phenomenon - that anything personal may be stored (not just George III but Random Randy) -, but it seems possible.

Re: Gemma 3 QAT Models: Bringing AI to Consumer GPUs

#270

I am running this on 16 GB AMD Radeon 7900 GRE with 64 GB machine with ROCm and llama.cpp on Windows 11. I can use Open-webui or the native gui for the interface. It is made available via an internal IP to all members of my home. It runs at around 26 tokens/sec and FP16, FP8 is not supported by the Radeon 7900 GRE. I just love it. For coding QwQ 32b is still king. But with a 16GB VRAM card it gives me ~3 tokens/sec,…

> My kid's been using it to feed his school textbooks and ask it questions

Which method are you employing to feed a textbook into the model?

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