# Can I run Qwen3-32B on an RTX 5090? | What Can I Run AI?

> Yes. Qwen3-32B at Q4_K_M needs about 23.8 GB; RTX 5090 has 32.0 GB usable. Estimated tokens/sec and context headroom.

Source: https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-5090/

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**Yes.** Qwen3-32B at Q4\_K\_M needs about 23.8 GB, and the GeForce RTX 5090 has 32.0 GB usable at a \~4k context.

# Can I run Qwen3-32B on an RTX 5090?

Qwen3-32B at Q4\_K\_M needs about 23.8 GB, and the GeForce RTX 5090 has 32.0 GB usable. That figure is 32 GB of VRAM on the spec sheet, of which 32.0 GB is usable for weights and cache, at 1792 GB/s memory bandwidth. Alibaba’s dense 32B Qwen3, a common “best quality that still fits a 24 GB card” pick. These are estimates from [our formula](https://whatcanirunai.vercel.app/method/), not measured benchmarks.

Quant that fits

Q4\_K\_M Fits with headroom

Memory needed

23.8 GB at Q4\_K\_M, \~4k context

Usable VRAM

32.0 GB of 32 GB VRAM

Est. tokens/sec

54–77 estimate

[Qwen3-32B](https://whatcanirunai.vercel.app/models/qwen3-32b/) · [GeForce RTX 5090](https://whatcanirunai.vercel.app/hardware/rtx-5090/) · [Everything this machine runs](https://whatcanirunai.vercel.app/what-can-i-run/rtx-5090/) · [Q4 vs Q8 vs FP16](https://whatcanirunai.vercel.app/quantization/)

## Memory at each quant

| Quant    | Need vs 32.0 GB | Verdict       |
| -------- | --------------- | ------------- |
| Q4\_K\_M | 23.8 GB         | Q4Fits        |
| Q8\_0    | 41.0 GB         | Q8Won’t fit   |
| FP16     | 76.4 GB         | FP16Won’t fit |

## Estimated tokens per second

Estimate: **54–77 tokens/sec** at Q4\_K\_M. This is a bandwidth-derived range, not a bench. Efficiency is a 60–85% GPU band from [How we calculate](https://whatcanirunai.vercel.app/method/).

## Context headroom

At Q4\_K\_M, this machine has headroom out to about **32k tokens** under our KV estimate. Longer chats need more memory for the cache. Figures assume an FP16 KV cache.

__Context headroom for Qwen3-32B on an RTX 5090 at Q4\_K\_M__
| Context | KV cache (FP16) | Total at Q4\_K\_M | Verdict   |
| ------- | --------------- | ----------------- | --------- |
| 4k      | 1.1 GB          | 23.8 GB           | Fits      |
| 8k      | 2.1 GB          | 24.9 GB           | Fits      |
| 16k     | 4.3 GB          | 27.1 GB           | Fits      |
| 32k     | 8.6 GB          | 31.4 GB           | Tight     |
| 64k     | 17.2 GB         | 39.9 GB           | Won’t fit |
| 128k    | 34.4 GB         | 57.1 GB           | Won’t fit |

From the model’s config. Try other sizes in the [VRAM calculator](https://whatcanirunai.vercel.app/vram-calculator/) or see the [context length guide](https://whatcanirunai.vercel.app/context-length/).

## What to do instead

* Q8\_0 needs 41.0 GB and does not fit here. The [Mac mini M5 Pro 64GB](https://whatcanirunai.vercel.app/hardware/mac-mini-m5-pro-64/) has 48.0 GB usable, enough for Q8.
* See the [best GPU for this model family](https://whatcanirunai.vercel.app/best-gpu-for/qwen3/) and the [Qwen3-32B model page](https://whatcanirunai.vercel.app/models/qwen3-32b/).

## Other hardware for Qwen3-32B

* [Qwen3-32B on an RTX 3060 12GB](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-3060-12gb/)Won’t fit
* [Qwen3-32B on an RTX 3070 Ti](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-3070-ti/)Won’t fit
* [Qwen3-32B on an RTX 3080](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-3080-10gb/)Won’t fit
* [Qwen3-32B on an RTX 3090](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-3090/)Tight
* [Qwen3-32B on an RTX 4060 Ti 16GB](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-4060-ti-16gb/)Won’t fit
* [Qwen3-32B on an RTX 4070 Ti Super](https://whatcanirunai.vercel.app/can-i-run/qwen3-32b/rtx-4070-ti-super/)Won’t fit

## Other models on an RTX 5090

* [Qwen3-30B-A3B on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/qwen3-30b-a3b/rtx-5090/)Fits
* [Qwen3.8-27B on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/qwen3.8-27b/rtx-5090/)Fits
* [Gemma 3 27B on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/gemma-3-27b-it/rtx-5090/)Fits
* [Gemma 4 31B on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/gemma-4-31b-it/rtx-5090/)Fits
* [gpt-oss-20b on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/gpt-oss-20b/rtx-5090/)Fits
* [Mistral Small 24B on an RTX 5090](https://whatcanirunai.vercel.app/can-i-run/mistral-small-3.2-24b-instruct-2506/rtx-5090/)Tight

## Quick answers

Can I run Qwen3-32B on an RTX 5090?

Yes. Qwen3-32B at Q4\_K\_M needs about 23.8 GB, and the GeForce RTX 5090 has 32.0 GB usable.

How much VRAM does Qwen3-32B need?

About 23.8 GB at Q4\_K\_M, 41.0 GB at Q8\_0 and 76.4 GB at FP16, estimated for a \~4k context.

How fast is Qwen3-32B on an RTX 5090?

Our estimate is 54–77 tokens per second at Q4\_K\_M. It is not a measured benchmark.

What context length can I use?

At Q4\_K\_M, our KV estimate supports up to about 32k tokens before the cache pushes the total over usable memory.

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