NVIDIA192 GB VRAM8,000 GB/s$6/hr

Llama 3 8B on B200 SXM 192GB: Does It Fit, How Fast, What It Costs

Llama 3 8B at FP16 needs 16.1 GB for its weights and 24.6 GB in total at 8K context with 8 concurrent users. That means it fits on a single B200 SXM 192GB. Every figure is computed by tokcalc's open-source capacity model.

Fits?
Yes, 1 GPU
24.6 GB needed / 192 GB available
Decode speed
323.8
tok/s per stream
Aggregate
3885
tok/s @ 8 concurrent
Cost / 1M tokens
$0.4290
1× B200 SXM 192GB
What changes as you add B200 SXM 192GBs
Tensor-parallel degree vs VRAM, throughput, and cost. Cost scales linearly with GPU count; decode throughput scales near-linearly too, so cost per token stays roughly flat.
GPUsTotal VRAMVRAM neededDecode tok/sAggregate tok/sTTFTCost / 1M tokFits?
1× B200192 GB24.6 GB323.83885208.5 ms$0.4290✓
2× B200384 GB24.6 GB550.413210119.5 ms$0.2523✓
4× B200768 GB24.6 GB11015284274.8 ms$0.1262✓
8× B2001536 GB24.6 GB220221136752.4 ms$0.0631✓
Concurrency vs context length
On 1× B200 SXM 192GB at FP16. KV cache scales linearly with context, so this is the number of users your GPUs can actually serve.
ContextConcurrent usersKV per requestFits?
4K327549.8 MB✓ fits
8K1631.07 GB✓ fits
33K404.29 GB✓ fits
66K208.59 GB✓ fits
131K1017.18 GB✓ fits
Other GPUs that run Llama 3 8B
Same workload, same quantization — ranked by value (tokens per dollar-hour).
GPUGPUsAggregate tok/sCost / 1M tok
RTX 5090 32GB1×870.3$0.1596
AMD MI300X 192GB1×2574$0.2698
V100 SXM2 32GB1×437.1$0.3177
A100 40GB SXM41×752.8$0.3321
AMD MI325X 288GB1×2914$0.3336
A100 80GB SXM41×971.4$0.3432
Frequently asked questions

Can Llama 3 8B run on B200 SXM 192GB?

Yes. Llama 3 8B at FP16 needs 24.6 GB including the KV cache, and B200 SXM 192GB has 192 GB — so it fits on a single GPU.

How fast is Llama 3 8B on B200 SXM 192GB?

323.8 tokens/sec per stream and 3885 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 208.5 ms, and inter-token latency is 3.1 ms.

What does Llama 3 8B on B200 SXM 192GB cost per million tokens?

$0.4290 per 1M output tokens at 1× B200 SXM 192GB ($6.00/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.

How much VRAM does Llama 3 8B need on B200 SXM 192GB?

16.1 GB for the weights at FP16, plus 8.6 GB of KV cache for 8 concurrent requests at 8K context — 24.6 GB total. Every extra concurrent user at long context costs more, so leave headroom.

Is B200 SXM 192GB the right choice for Llama 3 8B?

It works. Compare $0.4290 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 4× RTX 3080 10GB at $0.0443, and the fastest is 1× Cerebras CS-3 (WSE-3) at 9714 tok/s.

Adjust the workload yourself

Same formulas, your context length, concurrency, and quantisation.

Open in calculator