Apple192 GB VRAM800 GB/s$0/hr

Llama 2 7B on Mac M2 Ultra (192GB unified): Does It Fit, How Fast, What It Costs

Llama 2 7B at FP16 needs 13.5 GB for its weights and 47.8 GB in total at 8K context with 8 concurrent users. That means it fits on a single Mac M2 Ultra (192GB unified). Every figure is computed by tokcalc's open-source capacity model.

Fits?
Yes, 1 GPU
47.8 GB needed / 192 GB available
Decode speed
38.58
tok/s per stream
Aggregate
462.9
tok/s @ 8 concurrent
Cost / 1M tokens
—
1× Mac M2 Ultra (192GB unified) · quote required
What changes as you add Mac M2 Ultra (192GB unified)s
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× Mac192 GB47.8 GB38.58462.98.24 s—✓
2× Mac384 GB47.8 GB65.5815744.14 s—✓
4× Mac768 GB47.8 GB131.262962.08 s—✓
8× Mac1536 GB47.8 GB262.3251821.06 s—✓
Concurrency vs context length
On 1× Mac M2 Ultra (192GB unified) at FP16. KV cache scales linearly with context, so this is the number of users your GPUs can actually serve.
ContextConcurrent usersKV per requestFits?
4K832.15 GB✓ fits
8K414.29 GB✓ fits
33K1017.18 GB✓ fits
66K534.36 GB✓ fits
131K268.72 GB✓ fits
Other GPUs that run Llama 2 7B
Same workload, same quantization — ranked by value (tokens per dollar-hour).
GPUGPUsAggregate tok/sCost / 1M tok
RTX 5090 32GB2×3526$0.0788
AMD MI300X 192GB1×3067$0.2264
AMD MI325X 288GB1×3472$0.2800
A100 80GB SXM41×1157$0.2880
Intel Gaudi 3 128GB1×1909$0.2909
H100 SXM5 80GB1×1938$0.3583
Frequently asked questions

Can Llama 2 7B run on Mac M2 Ultra (192GB unified)?

Yes. Llama 2 7B at FP16 needs 47.8 GB including the KV cache, and Mac M2 Ultra (192GB unified) has 192 GB — so it fits on a single GPU.

How fast is Llama 2 7B on Mac M2 Ultra (192GB unified)?

38.58 tokens/sec per stream and 462.9 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 8.24 s, and inter-token latency is 25.9 ms.

What does Llama 2 7B on Mac M2 Ultra (192GB unified) cost per million tokens?

— per 1M output tokens at 1× Mac M2 Ultra (192GB unified). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.

How much VRAM does Llama 2 7B need on Mac M2 Ultra (192GB unified)?

13.5 GB for the weights at FP16, plus 34.4 GB of KV cache for 8 concurrent requests at 8K context — 47.8 GB total. Every extra concurrent user at long context costs more, so leave headroom.

Is Mac M2 Ultra (192GB unified) the right choice for Llama 2 7B?

It works. Compare — per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 8× RTX 3080 10GB at $0.0186, and the fastest is 2× Cerebras CS-3 (WSE-3) at 39347 tok/s.

Adjust the workload yourself

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

Open in calculator