DeepSeek V4 Flash on a Single AMD MI300X

205 pointsposted 5 hours ago
by zhoutong

48 Comments

GTP

an hour ago

Strange that in the prior art they didn't list DwarfStar, as it is able to run the same model (probably quantized differently though) in less memory. Maybe the author isn't aware of it?

majke

4 hours ago

I don't think you can buy a single "MI300X" unit, right? Only the box with x8 of these at a cost of ~250K EUR.

zhoutong

4 hours ago

It’s available on demand from a few cloud providers. Seems like the cheapest is AMD Developer Cloud (https://www.amd.com/en/developer/resources/cloud-access/amd-...) powered by Digital Ocean at $1.99/hour.

Edit: Now I think about it, this might be the cheapest way to run the DeepSeek V4 Flash 0731 on a dedicated inference server at original weights. I haven’t run mixed load benchmarks but I guess it’s possible to generate $3-$4 worth of tokens per hour and still maintain a usable per-user throughput.

WASDx

4 hours ago

At 830tok/s * 1 hour that's almost 3M tokens which is just $0.54 worth of tokens at Deepseeks current output price.

lnenad

3 hours ago

830t/s is burst aggregate. ~500 is sustained and it's for 8 concurrent users. Meaning for $1.99/hour if you serve 8 users it's 8*$0.54, not just $0.54.

You shouldn't rent one out if you're just serving it for yourself, but from a financial standpoint if you sell to users you can take a 100% margin.

minraws

2 hours ago

Bro 500 Aggregate. so that's 500 * 60 * 60 = 1.8M output which is .5$ at best... Not including pre-fill and stuff.

This is not the real margins, even if you are selling to 8 users it's 90 tps per median stream. So assuming that .6-.7$

This is not even remotely worth it.

You need to 3x this tps(~1500 tps) to be worth it, and that's what most providers are doing, at 20-30 users at 50-60 tps with better optimized batch processing and kernels you can make some profit.

lnenad

2 hours ago

You are right, it's not 500x8 it's 90x8.

Almondsetat

3 hours ago

You get privacy for 4 times the cost

krisknez

3 hours ago

How is that economically viable? They are selling at a loss?

gpugreg

3 hours ago

Agentic workloads are somewhere around 1%/0.5%/98.5% input/output/cached tokens. Cached tokens are pretty much free for inference providers (if they implement sparse and compressed attention properly) and throughput for input tokens is much higher.

Lets assume that you've got 2 million input tokens, 1 million output tokens and 98.5 million cached tokens to process. That would cost 2 * $0.14 + 1 * $0.28 + 98.5 * $0.0028 = $0.8358 with DeepSeek API pricing.

For comparison, it would take 2M / 8000 + 1M / 800 = 1500 seconds to process this amount of tokens with the linked framework, which is about $0.83 when we assume $2/hr for one MI300X.

However, other inference providers have 10 times higher prices for cached tokens, which results in a comfortable margin.

And we should not discount that DeepSeek also gets paid in data, which is probably more valuable to them.

And I believe that this framework still has some room for optimization for generation with high batch sizes.

throw10920

31 minutes ago

> should not discount that DeepSeek also gets paid in data, which is probably more valuable to them

That's agentic feedback loops for training, right? Any more detail on this, such as how they actually tell whether that data is good or not? That seems like a very hard problem, and like the value of that data is low compared to just building their own, controlled RL gyms.

xyzzy_plugh

2 hours ago

Your math is a bit funny if you're assuming the 1/0.5/98.5 ratios: you doubled input and output tokens but not cached. If you double cached tokens to match your original ratio it works out to around $1.11, and if you 10x the cached token cost it's around $6.08.

Based on your $0.83 estimate, the margin isn't great. This is within shooting distance of "at cost" which is probably pretty close to what DeepSeek is operating with, ignoring the value of the data they're collecting of course.

> And I believe that this framework still has some room for optimization for generation with high batch sizes.

If that optimization can bring this scenario closer to $0.50 then it gets pretty compelling, otherwise I'm not confident.

drob518

an hour ago

I think Deepseek is selling roughly at cost (perhaps a slight premium). They don’t guarantee that they don’t train on the submitted prompts, so I suspect they are mining the data. Mining for what? Well, who knows. Best case, mining to make Deepseek better. That said, I use Deepseek all the time. It has done a whole lot of ‘ls’ commands on my system, though.

dietr1ch

3 hours ago

They claim their advantage is knowing how to serve their models efficiently, which is quite possible since they design for it.

simlevesque

an hour ago

They get all our invaluable data which they'll use to train the next model, to get more data, to train the model after.

pama

3 hours ago

Use nvidia hardware instead and use a larger cluster serving many more users concurrently. Easily 10x–20x higher token rate per GPU with public solutions like dynamo and sglang.

thrownaway561

3 hours ago

This is exactly what I came to say. The price of Flash is so cheap that trying to run it locally or with your own hardware is pointless. I was using it about a month ago to program some stuff and ran it for 4 days non-stop and it cost me about $2.

ux266478

an hour ago

If you don't do any attention steering, custom decoding or meddle with the weights maybe. Services are worthless unless all you do is write positive prompts.

As others have mentioned, there's the privacy factor as well.

jorvi

2 hours ago

With the cost of electricity, hardware depreciation and tok/s it rarely makes sense to run locally.

NitpickLawyer

2 hours ago

> trying to run it locally or with your own hardware is pointless.

Serving local models has advantages other than price. If you work in restricted industries, or have a strong need to protect your IP, or if you just value privacy more than cost, you now have options.

Tepix

an hour ago

If you have 2x DGX Spark it will run quite nicely. They cost only $8000 or so and use less power so you may be able to rent them cheaper than the MI300X.

I found an offer to rent two at $1.65 per hour https://spark.enverge.ai/#pricing

The MI300X will vastly outperform it for only a slightly higher price.

langs

3 hours ago

You need to optimize the KVCache part(save to disk to save compute) to achieve this goal.

throwawayffffas

an hour ago

You can get one on ebay for like 20k, but it comes without the backplane and i dont think there is a pcie card adaptor from china like the ones for h200.

Lwerewolf

3 hours ago

The MI350p exists and should run a decent quant (say, the ~96GB antirez mix) well, but you can get two rtx pro 6000s for one of these, or 8x (actually more) r9700 + probably the gear to run them, etc.

Otherwise, you can probably buy one of these second hand from somewhere (SXM A100s are available that way) and run it in an adapter board.

touisteur

an hour ago

I thought MI350P wasn't available yet, curious where to source it right now.

_joel

3 hours ago

I thought it was a consumer grade GPU until I saw the 192GB of HBM and 256GB or RAM.

varispeed

3 hours ago

To be fair the development of GPUs have stalled over the years. If they kept up with the progress instead of focusing on enterprise market, likely 256GB consumer GPU would be a norm today.

baalimago

4 hours ago

Give it an AI-bubble pop and these will be flooding the market.

segmondy

2 hours ago

no they won't , the bubble is a financial thing. the demand is real and not going away.

atwrk

3 minutes ago

The big question is whether the demand will stay if the subsidized pricing ends. That's what the bubble talk is about. Right now all the players compete for market share and don't care about the losses (hence the debt). But what happens if no one wants to lend them anymore?

_factor

4 hours ago

They will be instantly bought out by companies, not individuals. The consumer bubble won’t pop for quite a while yet. Production also won’t ramp up while lack of real competition keeps the demand high.

tamimio

2 hours ago

Thing is, GPUs will always be on demand, look at their history, initially for gaming, then for hash cracking, then 3D rendering, then for crypto mining, and now AI training and fine tuning. When AI bubble bursts, there will be another bubble taking over.

The only solution is more companies making high end units, only competition will make it better for consumers.

aurareturn

3 hours ago

When is it popping? Is the AI bubble in the room with us now?

dghlsakjg

43 minutes ago

Nvidia has ever so slightly underperformed the SP500 YTD (at the exact time this comment is being typed), so its basically the apocalypse already.

amrit3128

2 hours ago

Tomorrow? Next year? In 5 years? Nobody can say. But we do know that AI is overvalued, so it WILL pop.

aurareturn

2 hours ago

Well, if no body can say when it will pop, then can we really say it's a bubble and it's overvalued?

I can tell you it will pop in 10 years and when it pops, it will still be 20x bigger than in 2026. Does that even make any sense?

People said AI bubble will pop soon in 2024 and that it was overvalued. Turns out, many AI stocks 10x, 20x since 2024. Actual usage has gone exponential as well. Anthropic revenue went from $100m ARR at start of 2024 to $80b ARR today.

ekidd

2 hours ago

> Well, if no body can say when it will pop, then can we really say it's a bubble and it's overvalued?

Well, given the literal trillions being spent, the only ways this pays off are:

1. AI replaces a non-trivial fraction of human employees.

2. Someone builds a Culture Mind, and humans become (hopefully) pampered pets of AIs we don't understand. Seems unlikely, but it would arguably count as a payoff even if it made money meaningless.

Or maybe the AIs don't want pets, and you get SkyNet. Which definitely doesn't care about paying off anyone's investments.

When you look at various news articles about investors, yeah, there are definitely a lot of rich people who think that they're going to automate all human labor or just bring about the Singularity. Possibly with them in charge of the rest of us. If you don't make these kinds of wild assumptions, then yeah, this is looking like one of the biggest bubbles ever.

aurareturn

an hour ago

Can we see some actual numbers, projections, models instead of vibes?

Joel_Mckay

2 hours ago

Many are saying July 2027, as in the past these market corrections have correlated with Shrek movie releases.

Debt-backed investors have to pay up eventually. =3

slaw

2 hours ago

The AI bubble will pop when China gets access to EUV, so the earliest it could happen is 2030

xorfish

2 hours ago

This is still quite a bit away from the performance that deepseek gets on their H800. In their DSpark paper they report a throughput of 15k tokens/s/gpu. The MI300 should be able to compete with the H800 so there are probably still quite a few optimizations that can be made.

Tepix

an hour ago

Unfortunately, the MI300X is an OAM module. The MI350P is the one you want: It's a PCIe card, but it has less memory: 144GB.

Luckily, DeepSeek V4 Flash will run in 144GB too because it's 256 MoE exports are native MXFP4 quantized.

WhitneyLand

an hour ago

How do you figure that?

When they just loaded the weights alone, it was taking 156GB in vLLM. After warm-up and adding a KV cache pool, it took over 200GB.

And this implementation is already cutting down the 1M token context window you would normally get.

WhitneyLand

36 minutes ago

Another headline of “model runs on x”, which usually means “let’s list how much you give up to run on x”.

Dumbed down quantization?

No. Full intended inference weights preserved, so far so good.

Slow performance?

No again. Looks like you could get over 150 tokens/second.

Give up context window size?

Yes. Original model is trained for and served at 1M, this is 256k. A very practical tradeoff though. Codex is in this range, and quality does start to drop off toward the full size.

sylware

an hour ago

Is their hardware programming interface reasonable for implementing inference of frontier models: no quantization, several tera params?

BTW, how many many params open weight frontier models have? A few teras, 100s of teras?

wren6991

an hour ago

Kimi-K3: 2.8T

Qwen3.8-Max: 2.4T

DeepSeek V4 Pro: 1.6T

DeepSeek V4 Flash: 284B

(all are total parameter counts, not active parameters)