Can DeepSeek LLM 67B run on NVIDIA L40S 48GB?

BARELY — Tight on Memory

C47Usable
Estimated from fit model

DeepSeek LLM 67B needs ~52.4 GB VRAM. NVIDIA L40S 48GB has 48.0 GB. With Q4_K_M quantization, expect ~10 tok/s.

Runtime: llama.cppCapacity: OffloadBandwidth: HighStack: StandardBottleneck: Host offload
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Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) 52.4 GB, 6.4 tok/s, Very compromised (needs ~3.4 GB host RAM)
52.4 GB required48.0 GB available
109% VRAM needed

4.4 GB over capacity — needs offload or smaller quantization

Fit status

Very compromised (needs ~3.4 GB host RAM)

Decode

6.4 tok/s

TTFT

30020 ms

Safe context

4K

Memory

52.4 GB / 48.0 GB

Offload

10%

Memory breakdown

Weights40.9 GB
KV Cache5.8 GB
Runtime0.9 GB
Headroom4.8 GB

See how fast it feels

See how fast it feelsDeepSeek LLM 67B on NVIDIA L40S 48GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step. Given information: - Speed = 60 mph (miles per hour) - Time = 2.5 hours Formula: Distance = Speed x Time Calculation: Distance = 60 mph x 2.5 h = 150 miles The train travels 150 miles. Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time. Breakdown: - First half: 1.25 hours at 60 mph = 75 miles - Stop: 20 minutes (no distance) - Second half: 1.25 hours at 60 mph = 75 miles Total distance: 150 miles (same) Total time: 2.5 h + 0.33 h = 2.83 hours Average speed: 150 / 2.83 = 53 mph The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 6.4 tok/s decode · 30.0s TTFT (warm) · 16 tok/s prefill

What limits this setup

It fits through host-memory offload, and offload is the main reason performance drops.

CPU or host-memory offload is active

About 10% of the working set spills out of accelerator memory, which usually hurts latency and sustained decode throughput.

Very little memory headroom

You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.

Best improvement path

Remove offload with more accelerator memory

Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

Buy headroom, not only minimum fit

A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

Increase host RAM if you keep offloading

This setup may need roughly {ram} GB of extra host RAM just for the offloaded portion, before OS and other tools.

Performance by workload

WorkloadGradeFitDecodeTTFTContext
ChatBRuns with offload (needs ~1.2 GB host RAM)7.3 tok/s14525 ms4K
CodingCVery compromised10.3 tok/s18805 ms4K
Agentic CodingFToo heavy8.3 tok/s34119 ms4K
ReasoningCVery compromised (needs ~3.4 GB host RAM)6.4 tok/s35479 ms4K
RAGFToo heavy5.2 tok/s68085 ms4K

Quantization options

How DeepSeek LLM 67B (67B params) fits at each quantization level on NVIDIA L40S 48GB (48.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
26.1 GB
LowB58
Q3_K_S
3
32.8 GB
LowB58
NVFP4Best for your GPU
4
37.5 GB
MediumB58
Q4_K_M
4
40.9 GB
MediumF0
Q5_K_M
5
48.2 GB
HighF0
Q6_K
6
54.9 GB
HighF0
Q8_0
8
71.7 GB
Very HighF0
F16
16
137.4 GB
MaximumF0

Get started

Copy-paste commands to run DeepSeek LLM 67B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \ --hf-repo "deepseek-ai/deepseek-llm-67b-chat" \ --hf-file "deepseek-llm-67b-chat-Q4_K_M.gguf" \ -c 4096 -ngl 99

Upgrade-Optionen

Hardware, die DeepSeek LLM 67B gut ausführt

Frequently asked questions

Can NVIDIA L40S 48GB run DeepSeek LLM 67B?

Yes, NVIDIA L40S 48GB can run DeepSeek LLM 67B with a C grade (Very compromised). Expected decode speed: 10.3 tok/s.

How much VRAM does DeepSeek LLM 67B need?

DeepSeek LLM 67B (67B parameters) requires approximately 52.4 GB of memory with Q4_K_M quantization.

What is the best quantization for DeepSeek LLM 67B?

The recommended quantization for DeepSeek LLM 67B is Q4_K_M, which balances quality and memory efficiency.

What speed will DeepSeek LLM 67B run at on NVIDIA L40S 48GB?

On NVIDIA L40S 48GB, DeepSeek LLM 67B achieves approximately 10.3 tokens per second decode speed with a time-to-first-token of 18805ms using Q4_K_M quantization.

Can NVIDIA L40S 48GB run DeepSeek LLM 67B for coding?

For coding workloads, DeepSeek LLM 67B on NVIDIA L40S 48GB receives a C grade with 10.3 tok/s and 4K context.

What context window can DeepSeek LLM 67B use on NVIDIA L40S 48GB?

On NVIDIA L40S 48GB, DeepSeek LLM 67B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

What should I upgrade first if DeepSeek LLM 67B feels slow on NVIDIA L40S 48GB?

Remove offload with more accelerator memory. Prioritize a GPU or unified-memory tier that fits the whole model natively. Removing offload usually helps more than small compute gains.

See all results for NVIDIA L40S 48GBSee all hardware for DeepSeek LLM 67B
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