What GPU do I need to run nvidia/Llama-3_3-Nemotron-Super-49B-v1?
49.9B parameters, published in BF16. View on Hugging Face
Set up Llama-3_3-N…ron-Super-49B-v1Llama-3_3-Nemotron-Super-49B-v1 is published by nvidia on Hugging Face, with 176,490 downloads and 327 likes to date. It's a DeciLMForCausalLM model built for text-generation, published natively in BF16.
VRAM required & cheapest live GPU fit
Required VRAM = weight size at each precision times a flat 1.2 overhead for activations and fragmentation. The KV-cache grows with context and is not in that factor; it is listed per model below where the architecture is published. Full formula and assumptions: methodology.
| Precision | Weight size | Required VRAM | Cheapest live fit | GPUs needed | Est. $/hr (full fit) |
|---|---|---|---|---|---|
| BF16 | 92.9 GB | 111.5 GB | AMD MI300X | 1 | $2.63/hr |
| cheaper alt. | RTX 5060 Ti | 7 | $0.770/hr | ||
| FP8 (quantized) | 46.4 GB | 55.7 GB | RTX PRO 6000 | 1 | $1.36/hr |
| cheaper alt. | RTX 5060 Ti | 4 | $0.440/hr | ||
| INT4 (quantized) | 23.2 GB | 27.9 GB | RTX 4080 Super | 1 | $0.338/hr |
| cheaper alt. | RTX 5060 Ti | 2 | $0.220/hr |
A GPU is only matched to a row if its hardware supports that precision, and the primary recommendation is always a single-GPU fit when one exists.
INT4 requires a quantized checkpoint actually published for this model, check its Hugging Face page before relying on this row.
Cheapest way to run Llama-3_3-Nemotron-Super-49B-v1 at its published (BF16) precision: 1× AMD MI300X, at $2.63/hr per GPU ($2.63/hr total). Quantizing to FP8 or INT4 (rows above) can cost less, but requires a compatible quantized checkpoint to exist for this model.
Llama-3_3-Nemotron-Super-49B-v1: KV cache by context length
The KV cache is the memory the attention layers hold for every token of context, on top of the weights. It is not part of the flat 1.2x overhead in the table above, grows with context length and with every concurrent request, and is why a long-context deployment needs more VRAM than the table shows.
Multi-head attention: every layer caches keys and values for every head. Cached per token: 2,621,440 bytes at 16-bit.
| Context | KV cache, one sequence |
|---|---|
| 4K | 10.0 GB |
| 32K | 80.0 GB |
| 128K | 320.0 GB |
Computed from the layer, head and window counts in the model's own configuration (nvidia/Llama-3_3-Nemotron-Super-49B-v1), at 16 bits per cached value. Each concurrent sequence needs its own cache, on top of the weights.
Llama-3_3-Nemotron-Super-49B-v1: common questions
Can Llama-3_3-Nemotron-Super-49B-v1 run on a single GPU?
Yes, but not on a desktop card. At BF16 it needs 111.5 GB of VRAM, more than a single 32 GB desktop card holds. The cheapest live single-card fit is a 192.0 GB AMD MI300X at $2.63/hr.
What is the least VRAM Llama-3_3-Nemotron-Super-49B-v1 can run in?
27.9 GB, at INT4 (quantized), which fits a 32 GB card, against 111.5 GB at BF16. That row assumes an INT4 checkpoint has actually been published for this model, so check its Hugging Face page before planning around it.
Does quantizing Llama-3_3-Nemotron-Super-49B-v1 lower the GPU bill?
Yes. At BF16 the cheapest live fit is one AMD MI300X at $2.63/hr. At INT4 (quantized) it drops to one RTX 4080 Super at $0.338/hr, provided a quantized checkpoint exists for it.
Weight-to-VRAM math, the fit rules, and how live prices are normalized: full methodology.
More Llama 3.3 models
- Llama-3_3-Nemotron-Super-49B-v1_5-FP8 (49.9B, F8_E4M3)
- Llama-3_3-Nemotron-Super-49B-v1_5 (49.9B, BF16)
- Llama-3.3-70B-Instruct (70.6B, BF16)
Alternatives at this size
Other models for text-generation within about a third of Llama-3_3-Nemotron-Super-49B-v1's 49.9B parameters, from other model lines.
- Qwen-72B (72.3B, BF16)
- Ornith-1.5-35B-A3B (36.0B, BF16)
- Kimi-Linear-48B-A3B-Instruct (49.1B, BF16)
- Phi-3.5-MoE-instruct (41.9B, BF16)
- Laguna-XS-2.1 (33.4B, BF16)
More on Llama-3_3-Nemotron-Super-49B-v1
Fits on a 141 GB GPU at BF16: every model that fits in 141 GB.
Fits on an 80 GB GPU at FP8: every model that fits in 80 GB.
Fits on a 32 GB GPU at INT4: every model that fits in 32 GB.
Related reading: AMD MI300X pricing and specs, How much VRAM you need for LLMs, Serving LLMs with vLLM, vLLM vs TensorRT-LLM vs SGLang, Best GPU for LLM inference, and What AI model fine-tuning is.
