---
license: cc-by-4.0
pretty_name: RTX 5080 Local LLM Throughput (Measured, Ollama)
language:
- en
tags:
- benchmark
- gpu
- llm-inference
- nvidia
- rtx-5080
- ollama
size_categories:
- n<1K
---

# RTX 5080 Local LLM Throughput — Measured, Not Estimated

Measured decode and prefill tokens/second, load times, and VRAM residency for
local LLMs on a single retail NVIDIA GeForce RTX 5080 (16 GB): gpt-oss:20b
(MXFP4), Qwen 2.5 14B and 7B (Q4_K_M), and Llama 3.2 3B (Q4_K_M), at 4k and
16k context with ~500 and ~1,650-token prompts.

## Method

- Every figure is the **median of 3 runs** using ollama's native
  `eval_count`/`eval_duration` counters — never wall-clock division.
- Every repetition prepends a unique nonce so each run pays a **full
  prefill**; without this, warm runs hit ollama's prompt cache and report
  ~60,000 tok/s cache-hit rates that measure nothing.
- Generation pinned: temperature 0, seed 42, 256-token target output.
- Model identity pinned by digest per row (a tag like `qwen2.5:14b` can
  silently move upstream).
- Bench environment recorded per row: RTX 5080, driver 610.88, ollama 0.32.1,
  Windows 11, Ryzen 7 7800X3D.

## Headline results

| Model | Quant | Decode tok/s | Resident VRAM |
|---|---|---:|---:|
| Llama 3.2 3B | Q4_K_M | 298–313 | 5.5 GiB (alone) |
| gpt-oss 20B | MXFP4 | 187–190 | 14.0–14.4 GiB |
| Qwen 2.5 7B | Q4_K_M | 177–180 | 6.2–7.0 GiB |
| Qwen 2.5 14B | Q4_K_M | 94–97 | 10.8–13.2 GiB |

The 20.9B MXFP4 model decodes 2x faster than the dense 14B at Q4_K_M and
matches the dense 7B — architecture and quantization beat parameter count.
Decode speed holds flat from 4k to 16k context at these prompt sizes.

## Caveats

Single retail unit, single driver, single runtime — these are *this card's*
numbers. The VRAM column is whole-GPU `nvidia-smi` at measurement time and can
include a previously-benched model still resident (rows measured alone are the
lower readings).

## Canonical source

Method detail, change log, and living updates:
https://techfuelhq.com/data/rtx-5080-llm-throughput/

## License

CC BY 4.0 — attribute as "TechFuelHQ RTX 5080 LLM Throughput Dataset" linking
to the canonical page.