Can I Run Granite 3.0 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)?
Written by Jakub Rusinowski · Last updated October 21, 2024
Yes — comfortably
Yes, comfortably — Granite 3.0 8B Instruct at Q8_0 needs about 10.6 GB of the 16 GB usable on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM), leaving ~5.4 GB spare and running at ~66.7 tok/s (estimated), with room for about 32,768 tokens of context.
Confidence: high · Recommended quantization: Q8_0 · Estimated speed: ~66.7 tok/s
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RTX 5080 Desktop (16 GB VRAM, 32 GB RAM) — what it gives a model
| Usable memory for models | 16 GB |
| Memory bandwidth | 960 GB/s |
| Form factor | Desktop |
| Operating system | Windows or Linux |
| Memory upgradeable | Yes |
Granite 3.0 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM): memory by quantization
| Quant | Memory needed | Fits 16 GB? | Max context | Est. speed | Download |
|---|---|---|---|---|---|
| F16 | 18.1 GB | ✗ No | — | — | 16 GB |
| Q8_0 | 10.6 GB | ✓ Yes | 32K | ~66.7 tok/s | 8.5 GB |
| Q6_K | 8.7 GB | ✓ Yes | 32K | ~81.4 tok/s | 6.6 GB |
| Q5_K_M | 7.8 GB | ✓ Yes | 32K | ~90.5 tok/s | 5.7 GB |
| Q4_K_M | 7 GB | ✓ Yes | 32K | ~101.1 tok/s | 4.8 GB |
| Q3_K_M | 5.6 GB | ✓ Yes | 64K | ~126.4 tok/s | 3.4 GB |
| Q2_K | 4.8 GB | ✓ Yes | 64K | ~146.4 tok/s | 2.6 GB |
RTX 5080 desktop limitations
- 16 GB VRAM is the binding constraint, not compute — a slower 24 GB card runs strictly more models.
Recommended setup
Ollama or llama.cpp (CUDA/ROCm) — vLLM if you need concurrent serving
How these numbers are calculated
- Memory need = quantized weights + KV cache at 8,192 tokens (f16) + 0.8 GB runtime overhead.
- 16 GB of VRAM on the NVIDIA GeForce RTX 5080 at 960 GB/s.
- 32 GB of system RAM available for CPU offload when a model exceeds VRAM.
- Throughput is a memory-bandwidth roofline estimate, not a measurement. It is labelled "estimated" everywhere it appears.
- KV cache is computed from this model's published attention configuration.
FAQ
Can I run Granite 3.0 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)?
Yes, comfortably — Granite 3.0 8B Instruct at Q8_0 needs about 10.6 GB of the 16 GB usable on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM), leaving ~5.4 GB spare and running at ~66.7 tok/s (estimated), with room for about 32,768 tokens of context.
Which quantization of Granite 3.0 should I use on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)?
Q8_0 — it needs about 10.6 GB of the 16 GB available, downloads as roughly 8.5 GB, and runs at an estimated 66.7 tokens/sec with up to 32K of context.
What limits Granite 3.0 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)?
Nothing binding — the model fits with headroom and generates at a usable speed on this hardware.
Which runtime should I use?
Ollama or llama.cpp (CUDA/ROCm) — vLLM if you need concurrent serving
Other Computers
Other Models on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
- IBM Granite 4.0 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
- IBM Granite 4.1 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
- IBM Granite 4.2 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
- InternLM 3 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
- LFM2.5 on RTX 5080 Desktop (16 GB VRAM, 32 GB RAM)
Granite 3.0 on GPUs
- Granite 3.0 on NVIDIA GeForce RTX 5070
- Granite 3.0 on NVIDIA GeForce RTX 5060 Ti 8GB
- Granite 3.0 on NVIDIA GeForce RTX 5060
- Granite 3.0 on NVIDIA GeForce RTX 4070 Ti
What This Model Is Good At
Model & Tools
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