AMD192 GB VRAM5,300 GB/s$2.5/hr

Qwen3.8 27B (VLM) on AMD MI300X 192GB: Does It Fit, How Fast, What It Costs

Qwen3.8 27B (VLM) at FP8 (E4M3) needs 27.8 GB for its weights and 33.3 GB in total at 8K context with 8 concurrent users. That means it fits on a single AMD MI300X 192GB. Every figure is computed by tokcalc's open-source capacity model.

Fits?
Yes, 1 GPU
33.3 GB needed / 192 GB available
Decode speed
186.0
tok/s per stream
Aggregate
2232
tok/s @ 8 concurrent
Cost / 1M tokens
$0.3111
1× AMD MI300X 192GB
What changes as you add AMD MI300X 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× AMD192 GB33.3 GB186.02232731.9 ms$0.3111✓
2× AMD384 GB33.3 GB316.27589381.4 ms$0.1830✓
4× AMD768 GB33.3 GB632.430357205.7 ms$0.0915✓
8× AMD1536 GB33.3 GB1265121426117.9 ms$0.0458✓
Concurrency vs context length
On 1× AMD MI300X 192GB at FP8 (E4M3). KV cache scales linearly with context, so this is the number of users your GPUs can actually serve.
ContextConcurrent usersKV per requestFits?
4K3911.07 GB✓ fits
8K2382.15 GB✓ fits
33K718.59 GB✓ fits
66K3617.18 GB✓ fits
131K1834.36 GB✓ fits
Other GPUs that run Qwen3.8 27B (VLM)
Same workload, same quantization — ranked by value (tokens per dollar-hour).
GPUGPUsAggregate tok/sCost / 1M tok
RTX 5090 32GB2×2566$0.1083
A100 40GB SXM41×652.8$0.3830
AMD MI325X 288GB1×2527$0.3847
A100 80GB SXM41×842.3$0.3957
Intel Gaudi 3 128GB1×1390$0.3997
H100 SXM5 80GB1×1411$0.4922
Frequently asked questions

Can Qwen3.8 27B (VLM) run on AMD MI300X 192GB?

Yes. Qwen3.8 27B (VLM) at FP8 (E4M3) needs 33.3 GB including the KV cache, and AMD MI300X 192GB has 192 GB — so it fits on a single GPU.

How fast is Qwen3.8 27B (VLM) on AMD MI300X 192GB?

186.0 tokens/sec per stream and 2232 tok/s aggregate with continuous batching at 8 concurrent users. Time to first token is 731.9 ms, and inter-token latency is 5.4 ms.

What does Qwen3.8 27B (VLM) on AMD MI300X 192GB cost per million tokens?

$0.3111 per 1M output tokens at 1× AMD MI300X 192GB ($2.50/hr). That is the marginal hardware cost — add idle capacity, ops, and egress for the real figure.

How much VRAM does Qwen3.8 27B (VLM) need on AMD MI300X 192GB?

27.8 GB for the weights at FP8 (E4M3), plus 5.5 GB of KV cache for 8 concurrent requests at 8K context — 33.3 GB total. Every extra concurrent user at long context costs more, so leave headroom.

Is AMD MI300X 192GB the right choice for Qwen3.8 27B (VLM)?

It works. Compare $0.3111 per 1M tokens against the alternatives below — the cheapest option that fits the same workload is 4× RTX 3080 10GB at $0.0511, and the fastest is 1× Cerebras CS-3 (WSE-3) at 8423 tok/s.

Adjust the workload yourself

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

Open in calculator