You can only run heavily quantized models on all 3/4/5 rtx gpus (with 32gb or less vram) - and you probably want moe versions like Qwen 35b for this to run at speed somewhat comparable to Claude. It’s still not there to be honest but getting there. Personally I mess around with llama.cpp on m5 max with 128gb - it’s a decent setup to try various medium sized things, and runs llms surprisingly well without quantization, at least the moe models.
replyTwo 3090s is 48GB, so it's possible to run the 6-bit quantization comfortably, which is fine. It doesn't start to get notably dumber until lower than that. It won't be as fast as a hosted model, but dual 3090s will be comfortably fast for interactive use with the MoE version and not terrible to use with the dense model. I run the dense model at 8 bits on my dual Radeon V620 desktop machine, which I think would be slower than two 3090s, or at least not notably faster.
replyHave you done comparisons with 4 bit and seen a noticeable difference for coding tasks?
replyNo, I've just seen benchmarks showing most models start degrading around 4-5 bits. That's not to say they become useless, just that down to about 6-bits (with careful hybrid quantizations like unsloth where some of the layers aren't quantized or are quantized at higher bit depths) the quality isn't measurably degraded, but below that there are measurable differences in performance.
replyPeople report good results from DeepSeek V4 Flash at 2 bits (the DwarfStar 4 folks are doing it, and I've tried it on my Strix Halo, but it's too slow to be usable, so I haven't bothered to figure out if it's actually smart enough to use for anything).
Anyway, it's obvious models have to degrade in terms of knowledge, at any quantization, even though it may not show up clearly on benchmarks until lower. If you halve the size of the data available, it necessarily loses information about the world.