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Comment by verdverm | Hacker News Reader

this is to offload VRAM to DRAM (for GP comment), and makes no difference for URAM

You can definitely offload n-gram embeddings to storage; they're very sparsely used (only a few KB fetched per token) so this is quite effective. Loading to DRAM only becomes necessary if they are a bottleneck to overall performance (which might happen if you're doing very wide batches and everything else uses super fast VRAM/HBM).

I was looking at the qwen-next-flash, and the weights would fill my OEM Spark on their own, before the n-gram. I'm unclear if offloading to disk can work here, is that what you are implying is possible?!

Check out eugr’s TP=1 sparkrun recipe :)

It’s an NVFP4 quant, but it fits, and is surprisingly capable.

do you have a HF link? HF search is not uncovering it for me

(or is it somewhere else)

https://github.com/spark-arena/eugr-recipes/blob/main/recipe...

This one!

I'd recommend pointing your agent at it (after installing sparkrun), and asking it to research the absolute latest in TP=1 Flash-Next - mine grabbed particular vLLM nightlies and mods to improve performance, and it was well worth it.

I have a quirky vLLM on k8s on 2x OEM sparks setup with 9 models available to me. I'm not keen to run nightly vLLM, too many issues with it in the past. Going the qwen-next path means displacing things I use daily :/

I have a watchful eye on the diffusion ~ Jev/Kev PR

https://github.com/vllm-project/vllm/pull/57250

For what it's worth, Flash Next outperforms every other model that is available to us on the GB10 in all of my testing; though if you have two sparks then the TP=2 version is even better and easier (I don't think you'll need the nightly for that at all, just use the recipe)

I'm so tempted to buy a second one...

prices have gone up quite a bit...

I'm running embedding, reranking, and policy tuned models too, and a Jev/Kev when that's landed. Flash Next is not a substitute for those

I have OpenCode/Fireworks to access big models

looks like this is likely it

https://github.com/spark-arena/eugr-recipes

https://github.com/eugr/spark-vllm-docker

Nah, I’m streaming ngrams off NVMe on my Spark-alike right now. Works surprisingly well (except for when I accidentally bottlenecked it through my NAS)

What kind of throughput do you see on what models?

GB10 boxes have way more compute than they have memory bandwidth, which nicely fits medium sized MoE models with speculative execution (MTP, DSpark/DFlash, etc)

Qwen 3.8 Flash Next (what I'm running basically entirely now) sees 30 / 35.0 / 45 tk/s for prose, analysis and code respectively for actual use (not short context benchmarking) with Pi. Thinking blocks are ~35tk/s or so.

The GB10 having so much compute is great for prefill too, 2000-3000/s for 14k to 64k token prompts (cold cache too) in the quick benchmark I did. 3500tk/s for warm cache which is nice :)

When I accidentally streamed my ngrams over the 2.5Gb/s network, it cut all the throughput down in half basically. Especially notable for the time-to-first-token, which is what clued me in that I'd messed up somehow!

For Qwen 3.8 27B, I got it up to a consistent 20tk-25tk/s but 27B thinks so much that it was honestly too painful: Flash Next is as smart, as useful, but much faster for real agentic dev usage IMO

Laguna S 2.1 saw similar numbers to Flash Next if I remember right, but their latest updates means it doesn't quite fit a GB10 128GB anymore at full context which is a shame.

Note: these are all NVFP4 quants (usually a dynamic one where some tensor layers are left at full precision though)

I personally stopped caring as much about the tok/s as the agents are largely in the background, and so have also moved preference from MoE to dense

I want to see about fine-tuning these models a bit on the GB10 to tame that over thinking and some other behaviors (like using tools I don't use)

qwen 3.8 seems to have been trained with some `rkt` that messes with tool outputs to "save tokens"

check out the spark arena website, its the raison d'etre

interesting, peer comment seems to indicate this is a possibility as well, will have to take a deeper look

n-grams can be kept on SSD, no need to hold them in any kind of RAM (at least w/o batching)

Am I missing a joke? WTF is URAM?

unified memory, not sure if anyone uses URAM, I human hallucinated it

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