NVIDIA RTX 4070 Ti SUPER vs AMD Radeon RX 7900 XT

Analysis

The RTX 4070 Ti SUPER ($799 at its January 2024 launch) and the RX 7900 XT ($899 at its December 2022 launch) are the two cards a buyer in the $700 to $900 range ends up cross-shopping, and for local LLMs they trade the same two things against each other: 20GB and 800 GB/s on the AMD card, 16GB and 672 GB/s plus the CUDA software stack on the NVIDIA one.

On any model both cards hold, speed follows bandwidth at a little under full strength: the XT's 800 GB/s is 19.0% above the 4070 Ti SUPER's 672, and Qwen3 14B at Q4_K_M decodes at 58.4 tok/s versus 50.2, while Qwen 3.6 27B at Q3_K_M (15.15 GB, the largest native build for both) runs 43.4 versus 37.4. The extra 4GB changes what fits, not just how fast: this site's calculator fits 51 of the 99 tracked models natively on the XT against 46 on the 4070 Ti SUPER, and the five extra are all 32B to 34B models (Qwen3 32B, Qwen 2.5 32B, Qwen 2.5 Coder 32B, DeepSeek R1 Distill Qwen 32B and Yi 1.5 34B), each fitting only at Q2_K, where the quality loss is real. The 4070 Ti SUPER does not fit anything the XT cannot. The more practical benefit is one quant step higher on models both cards run: Gemma 4 31B fits the XT at Q3_K_M (18.23 GB, 37.4 tok/s) but only reaches Q2_K on the 4070 Ti SUPER (14.79 GB, 38.6 tok/s), a slightly faster but lower-quality build. Neither card runs a 70B-class model natively; Llama 3.3 70B needs 40.72 GB even at Q3_K_M and offloads at 1.4 tok/s on the XT and 1.1 on the 4070 Ti SUPER. The software gap runs the other way: CUDA is the best-supported backend across inference tools, while the XT depends on ROCm (which AMD and Ollama both document for this card) or llama.cpp's Vulkan backend, with fewer tools behind either.

Bottom line: For llama.cpp or Ollama users who want 27B to 35B-class models, the RX 7900 XT is the stronger card: 25% more VRAM and about 16% more speed for $100 more at launch pricing, which mostly buys one quant step higher on 27B to 31B models rather than a new class of model. The RTX 4070 Ti SUPER is the right choice if your workflow depends on CUDA-only tools or you mostly run models up to 14B, where the two cards fit the same models and the XT's only advantage is that 16% speed edge. Neither card changes the picture for 70B-class models; that takes more VRAM than either offers.