Can Falcon H1 1.5B Instruct run on RTX 5090 32GB?

YES — Runs Great

C40Usable

Estimated from fit model

Falcon H1 1.5B Instruct needs ~5.2 GB VRAM. RTX 5090 32GB has 32.0 GB. With Q4_K_M quantization, expect ~21 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) — 5.2 GB, 28.5 tok/s, Runs well

5.2 GB required32.0 GB available

16% VRAM used

Fit status

Runs well

Decode

28.5 tok/s

TTFT

6793 ms

Safe context

2.5M

Memory

5.2 GB / 32.0 GB

Memory breakdown

Weights0.9 GB

KV Cache0.2 GB

Runtime0.9 GB

Headroom3.2 GB

See how fast it feels

See how fast it feelsFalcon H1 1.5B Instruct on RTX 5090 32GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 28.5 tok/s decode · 6.8s TTFT (warm) · 71 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	C	Runs well	21.0 tok/s	5029 ms	2.2M
Coding	C	Runs well	21.0 tok/s	9219 ms	2.5M
Agentic Coding	C	Runs well	21.0 tok/s	13410 ms	2.5M
Reasoning	C	Runs well	21.0 tok/s	10895 ms	2.5M
RAG	C	Runs well	21.0 tok/s	16762 ms	2.5M

Quantization options

How Falcon H1 1.5B Instruct (1.5B params) fits at each quantization level on RTX 5090 32GB (32.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	0.6 GB	Low	C42
Q3_K_S	3	0.7 GB	Low	C42
NVFP4	4

Get started

Copy-paste commands to run Falcon H1 1.5B Instruct on your machine.

Run

lms load hf-unsloth--falcon-h1-1-5b-instruct-gguf && lms server start

Upgrade options

Hardware that runs Falcon H1 1.5B Instruct well

MacBook Pro M3 Max 48GBBudget pick

48 GB Unified (+16)

This setup is broadly balanced for this model.21 tok/s decode

~$2,499 MSRP

MacBook Pro M4 Max 48GBBest value

48 GB Unified (+16)

This setup is broadly balanced for this model.21 tok/s decode

~$2,499 MSRP

Frequently asked questions

Can RTX 5090 32GB run Falcon H1 1.5B Instruct?

Yes, RTX 5090 32GB can run Falcon H1 1.5B Instruct with a C grade (Runs well). Expected decode speed: 21.0 tok/s.

How much VRAM does Falcon H1 1.5B Instruct need?

Falcon H1 1.5B Instruct (1.5B parameters) requires approximately 5.2 GB of memory with Q4_K_M quantization.

What is the best quantization for Falcon H1 1.5B Instruct?

The recommended quantization for Falcon H1 1.5B Instruct is Q4_K_M, which balances quality and memory efficiency.

What speed will Falcon H1 1.5B Instruct run at on RTX 5090 32GB?

On RTX 5090 32GB, Falcon H1 1.5B Instruct achieves approximately 21.0 tokens per second decode speed with a time-to-first-token of 9219ms using Q4_K_M quantization.

Can RTX 5090 32GB run Falcon H1 1.5B Instruct for coding?

For coding workloads, Falcon H1 1.5B Instruct on RTX 5090 32GB receives a C grade with 21.0 tok/s and 2.5M context.

What context window can Falcon H1 1.5B Instruct use on RTX 5090 32GB?

On RTX 5090 32GB, Falcon H1 1.5B Instruct can safely use up to 2.5M tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

See all results for RTX 5090 32GB See all hardware for Falcon H1 1.5B Instruct

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