Can WizardLM 13B run on NVIDIA L20 48GB?

YES — Runs Great

A74Great

Estimated from fit model

WizardLM 13B needs ~25.8 GB VRAM. NVIDIA L20 48GB has 48.0 GB. With Q4_K_M quantization, expect ~84 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced

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) — 25.8 GB, 83.5 tok/s, Runs well

25.8 GB required48.0 GB available

54% VRAM used

Fit status

Runs well

Decode

83.5 tok/s

TTFT

2318 ms

Safe context

Memory

25.8 GB / 48.0 GB

Memory breakdown

Weights7.9 GB

KV Cache12.2 GB

Runtime0.9 GB

Headroom4.8 GB

See how fast it feels

See how fast it feelsWizardLM 13B on NVIDIA L20 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: 83.5 tok/s decode · 2.3s TTFT (warm) · 209 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	A	Runs well	83.5 tok/s	1264 ms	8K
Coding	A	Runs well	83.5 tok/s	2318 ms	8K
Agentic Coding	A	Runs well	83.5 tok/s	3372 ms	8K
Reasoning	A	Runs well	83.5 tok/s	2740 ms	8K
RAG	A	Runs well	83.5 tok/s	4215 ms	8K

Quantization options

How WizardLM 13B (13B params) fits at each quantization level on NVIDIA L20 48GB (48.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	5.1 GB	Low	B62
Q3_K_S	3	6.4 GB	Low	B63
NVFP4	4

Get started

Copy-paste commands to run WizardLM 13B on your machine.

Run

lms load WizardLM-13B-V1.0 && lms server start

Your hardware

More models your NVIDIA L20 48GB can run

Model	Params	Grade	Decode	Capabilities
Qwen3-Coder 30B A3B Instruct	30.5B	S	68.7 tok/s
Qwen 3.5 27B	27B	S	28.6 tok/s

Frequently asked questions

Can NVIDIA L20 48GB run WizardLM 13B?

Yes, NVIDIA L20 48GB can run WizardLM 13B with a A grade (Runs well). Expected decode speed: 83.5 tok/s.

How much VRAM does WizardLM 13B need?

WizardLM 13B (13B parameters) requires approximately 25.8 GB of memory with Q4_K_M quantization.

What is the best quantization for WizardLM 13B?

The recommended quantization for WizardLM 13B is Q4_K_M, which balances quality and memory efficiency.

What speed will WizardLM 13B run at on NVIDIA L20 48GB?

On NVIDIA L20 48GB, WizardLM 13B achieves approximately 83.5 tokens per second decode speed with a time-to-first-token of 2318ms using Q4_K_M quantization.

Can NVIDIA L20 48GB run WizardLM 13B for coding?

For coding workloads, WizardLM 13B on NVIDIA L20 48GB receives a A grade with 83.5 tok/s and 8K context.

What context window can WizardLM 13B use on NVIDIA L20 48GB?

On NVIDIA L20 48GB, WizardLM 13B can safely use up to 8K tokens of context. The model's official context limit is 8K, but available memory constrains the safe maximum.

See all results for NVIDIA L20 48GB See all hardware for WizardLM 13B

Embed this result▼

Paste this snippet into any page to show a live fit card.

<iframe src="https://willitrunai.com/embed/wizardlm-13b-on-l20-48gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>

Preview: