主な違い

• VRAM is 16GB GDDR7 on the ZOTAC vs 4GB GDDR6 on the PowerColor. That's a 4x gap, and the memory bus is 256-bit vs 64-bit. The ZOTAC pushes 896 GB/s of bandwidth; the PowerColor manages 143.9 GB/s.
• Raw compute is not even close. The ZOTAC hits 43.94 FP32 TFLOPS and a PassMark G3D score of 32,373. The PowerColor sits at 5.76 TFLOPS and 9,626. That's roughly a 7.6x performance gap in raw throughput.
• Ray tracing and 4K gaming are basically off the table for the PowerColor. It scores 23 for 4K gaming and 30 for ray tracing. The ZOTAC scores 93 in both. If you want RT effects or anything above 1080p, the PowerColor will struggle hard.
• The PowerColor does win on clock speeds, 2,650 MHz base and 2,820 MHz boost vs the ZOTAC's 2,480 and 2,482. But clock speed doesn't matter when you have a quarter of the VRAM and a fraction of the cores. It's like revving a scooter engine harder and hoping it keeps up with a V8.
• Both cards hold a 4.5/5 rating, but the ZOTAC has 159 reviews vs 268 for the PowerColor. SFF builders specifically praise the ZOTAC for fitting in small cases without mods, though a few unlucky buyers got DOA units and felt the RMA replacements were refurbished. The PowerColor's reviews skew toward budget buyers who knew what they were getting.