AMD Radeon RX 7800 XT vs NVIDIA RTX 5080
Which graphics card is better for running local language models? Here is how the AMD Radeon RX 7800 XT (16 GB) compares against the NVIDIA RTX 5080 (16 GB) in real memory headroom, supported model architectures, and generation speed.
AMD · RDNA 3
16 GB VRAM
AMD Radeon RX 7800 XT
- Memory Bandwidth: 624 GB/s (GDDR6 256-bit)
- Fits fully in VRAM: 34 popular models
- Power Draw (TDP): 263W
- Largest recommended (Q4): 20B–22B
NVIDIA · Blackwell
16 GB VRAM
NVIDIA RTX 5080
- Memory Bandwidth: 960 GB/s (GDDR7 256-bit)
- Fits fully in VRAM: 34 popular models
- Power Draw (TDP): 400W
- Largest recommended (Q4): 20B–22B
The AI Local Check Verdict: Which GPU should you buy for AI?
Both graphics cards share the exact same VRAM capacity (16 GB), meaning they can run the exact same parameter counts and quantization levels.
The deciding factor is memory bandwidth: The NVIDIA RTX 5080 leads with 960 GB/s vs 624 GB/s (54.0% faster memory), resulting in noticeably faster inference.
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