OpenAI
Can the RTX 5060 Ti 16GB run gpt-oss 20B?
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Yes, but it's tight. gpt-oss 20B is a 14 GB download (MXFP4 (as shipped)). The RTX 5060 Ti 16GB gives the GPU 16 GB, leaving about 2 GB, so keep the context short (our estimate).
Does it fit?
| gpt-oss 20B memory | 14 GB at MXFP4 (as shipped) (Ollama: gpt-oss tags) |
|---|---|
| RTX 5060 Ti 16GB GPU memory | 16 GB of VRAM (product listings). |
| Left over | About 2 GB (our arithmetic) |
| Verdict | Tight Under 4 GB to spare (our estimate bands) |
Recommended quantization and context
Use the MXFP4 (as shipped) build that Ollama's tag downloads; the memory figure above is for that build. The model supports up to 128K of context, but longer context uses more memory. Ollama starts at a 4096-token context by default (Ollama FAQ).
With only about 2 GB spare, keep the default context. If ollama ps shows part of the model on the CPU, shorten the context or pick a smaller model.
Run it
ollama run gpt-oss:20bThen check it's on the GPU:
ollama psThe PROCESSOR column should read 100% GPU. Driver setup for NVIDIA cards on Windows, Linux and macOS, plus common fixes, is in the install and run section.
Where to buy the RTX 5060 Ti 16GB
ASUS Dual GeForce RTX 5060 Ti 16GB OC
Price shown at Amazon
Sold at Amazon.
Check price at Amazon (opens in a new tab)
ABS Cyclone Aqua gaming PC (Core i7-14700F, RTX 5060 Ti 16GB, 16GB DDR5, 1TB SSD)
$1,599.99 Newegg · checked Oct 27, 2026, about 12:35 PM CT
Sold by Newegg, seen on the product page. Ships with 16 GB system RAM; plan an upgrade to 32 GB.
Check price at Newegg (opens in a new tab)FAQ
Can the RTX 5060 Ti 16GB run gpt-oss 20B?
Yes, but tight: gpt-oss 20B needs 14 GB (MXFP4 (as shipped), Ollama library) and the RTX 5060 Ti 16GB gives the GPU 16 GB, leaving about 2 GB. Keep the 4096-token default context. The fit bands are our estimate.
How much VRAM does gpt-oss 20B need?
14 GB for the MXFP4 (as shipped) build in the Ollama library, plus roughly 1–4 GB for context and runtime (our estimate). See the 16 GB page for other models that fit.
What command runs gpt-oss 20B?
ollama run gpt-oss:20b. Then run "ollama ps" and check the PROCESSOR column reads 100% GPU.
How fast is gpt-oss 20B on the RTX 5060 Ti 16GB?
We don't list a speed because we have no sourced measurement for this pairing. Speed depends on memory bandwidth, quantization and context length.