主な違い

• VRAM and memory architecture: the Sapphire packs 24GB of GDDR6 on a 384-bit bus with 960 GB/s bandwidth, while the Gigabyte has 16GB of newer GDDR7 on a 128-bit bus with 448 GB/s. More capacity and a wider bus win for 4K textures and AI workloads, but GDDR7 is more power-efficient per gigabyte.
• Raw performance: the Sapphire scores 31,427 on PassMark G3D and 17,736 on GPU Compute versus the Gigabyte's 22,099 and 10,484. That's roughly 42% and 69% more performance respectively, and it shows in the 4K gaming score of 91 vs 76.
• Ray tracing and AI: the Sapphire has 96 RT cores and 192 tensor cores compared to 30 and 120 on the Gigabyte. If you care about ray tracing or local AI/LLM work, the Sapphire's 93 vs 78 ray tracing score and 85 vs 67 AI score make this a no-brainer.
• Price and value: the Gigabyte wins the budget category 84 to 75 and holds a 4.6/5 rating from 329 reviews versus the Sapphire's 4.4/5 from 688 reviews. Owners of the Gigabyte consistently mention the 16GB VRAM as a sweet spot for 1440p, while Sapphire buyers note the card demands an 850W+ PSU and runs hot on power draw.
• Real-world quirks: Gigabyte owners report initial driver setup headaches with black screens requiring DDU reinstalls, though it's usually a one-time fix. Sapphire owners praise the quiet operation and cooling but occasionally mention coil whine and the chunky 4-slot design.