Memory bandwidth comparison across devices
Memory bandwidth comparison across devices
A comparison of theoretical peak memory bandwidth, bus widths, and memory standards across mobile SoCs, laptop workstations, desktop PCs, and discrete laptop GPUs:
| Device / Processor | Peak bandwidth | Memory bus width | Memory standard |
|---|---|---|---|
| iPhone 14 Pro (A16 Bionic) | 51.2 GB/s | 64-bit (4 × 16-bit) | LPDDR5-6400 (6,400 MT/s) |
| iPhone 15 Pro (A17 Pro) | 51.2 GB/s | 64-bit (4 × 16-bit) | LPDDR5-6400 (6,400 MT/s) |
| iPhone 16 Pro (A18 Pro) | 60.0 GB/s | 64-bit (4 × 16-bit) | LPDDR5X-7500 (7,500 MT/s) |
| iPhone 17 Pro (A19 Pro) | 76.8 GB/s | 64-bit (4 × 16-bit) | LPDDR5X-9600 (9,600 MT/s) |
| Huawei Pura 70 Pro+ (Kirin 9010) | 51.2 GB/s | 64-bit (4 × 16-bit) | LPDDR5-6400 (6,400 MT/s) |
| Dell Precision 7680 (13th Gen Intel) | 89.6 GB/s | 128-bit (Dual-channel) | DDR5-5600 |
| Desktop PC (Dual-channel DDR5) | 102.4 GB/s | 128-bit (Dual-channel) | DDR5-6400 (6,400 MT/s) |
| MacBook Pro (M1 Pro) | 200.0 GB/s | 256-bit (4 × 64-bit) | LPDDR5-6400 (6,400 MT/s) |
| RTX 3500 Ada (Laptop GPU) | 432.0 GB/s | 192-bit (6 × 32-bit) | GDDR6 |
Note: The NVIDIA RTX 3500 Ada Laptop GPU typically comes configured with 12 GB of GDDR6 VRAM.
Note: The Huawei Pura 70 Pro+ memory bandwidth figure (51.2 GB/s) is referenced from Wikipedia’s HiSilicon processor database (calculated from 3,200 MHz / LPDDR5-6400 over a 64-bit bus). However, Wikipedia does not currently include a direct citation for this specific metric, and web searches have not yet yielded an authoritative primary source.
Key observations
- Smartphone SoCs: Moving from LPDDR5-6400 (51.2 GB/s on A16/A17 Pro) to LPDDR5X-7500 (60.0 GB/s on A18 Pro) and LPDDR5X-9600 (76.8 GB/s on A19 Pro) steadily increases mobile memory bandwidth without widening the 64-bit bus. The Kirin 9010 on the Huawei Pura 70 Pro+ maintains 51.2 GB/s over a standard 64-bit quad-channel LPDDR5-6400 bus.
- Desktop DDR5: Standard dual-channel DDR5-6400 on a desktop platform achieves 102.4 GB/s of memory bandwidth across its 128-bit bus.
- Apple Silicon unified memory: The M1 Pro achieves 200 GB/s by employing a wide 256-bit bus, feeding both CPU and GPU from a shared high-bandwidth pool.
- Discrete GPUs vs. host RAM: While standard dual-channel DDR5 delivers ~76–102 GB/s, discrete GPUs like the RTX 3500 Ada utilize high-speed GDDR6 to reach 432 GB/s over a 192-bit bus.