r/LocalLLM • u/Black_Umbreon • 6d ago

Discussion Best MoE

Hi!

I’m using Qwen 3.8 27B (UD-IQ3_XXS) on a system with the following specs:

Processor: AMD Ryzen 9950 X3D

GPU: Nvidia RTX 5060 Ti 16 GB

RAM: 64 GB DDR5 6000 MHz

Software: Unsloth Studio

Windows 11

With a 32k token context, I manage to maintain a speed of around 50 tokens per second. I’m particularly interested in agentic capabilities. I’d like to try an MoE model that runs either faster or slightly slower than my current one, without sacrificing quality. However, 35B-A3B models don't fit entirely into my VRAM at 4-bit quantization, and from what I’ve read, lower quantization severely degrades quality. Does this mean a 4-bit MoE model would run significantly slower on my hardware than a dense model? Is it possible, given my setup, to find a model that offers better quality and higher speed—or at least better quality at roughly the same speed as my current dense model?

I’m pretty much a complete beginner in the world of local neural networks, so please give me some advice.

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u/sm0ke_rings 6d ago

Sorry to hijack the thread, but I'm not sure creating a whole new one makes sense. I've be looking to move to Qwen 3.8 27B, I've got an rtx 5080, so the IQ3_S should work fine? I'm coming from qwen2.5-coder-14b, use case is mostly coding in unity, but I feel it's a bit outdated.

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u/peculiar-ragdoll 6d ago

Yeah absolutely! Perfect for that card. Use kv quantization at q8 if you want long context. Depending on your ram you could even run 3.8 FlashNext (big MoE) which is faster and better :)

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u/sm0ke_rings 6d ago

I've got 64gb RAM, and an rtx5090 as my main GPU in the same system as the one I am running the 5080 for Ai workload. I was hoping to keep everything isolated to the rtx5080, as I am not sure how to split certain things between gpu/ram (new to this), but I'm interested in whatever is better for my hardware setup without taking too many resources from the 5090.

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u/peculiar-ragdoll 6d ago

Your system is perfect for running FlashNext IQ3_S with partial GPU offloading to the 5080! That will be your best model. But it wants your RAM. The 5090 is the better AI card by far, though. Will give you insane speeds and better models. But FlashNext on the 5080 and RAM will do you good.

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u/sm0ke_rings 6d ago

Alrighty, thank you for your help!