SD Memory Card Speed Tests For The Sony A7r
The first read and write speeds listed are done as a control with the Macbook Pro SD USB 3.0 card reader. Next are the write speed results taken from the Sony A7r.
| SD Memory Cards | USB 3.0 Read | USB 3.0 Write | Sony A7r Write | Order |
| Kingston 64GB SDXC Class 10 / U3 | 88.1 MB/s | 74.3 MB/s | 35.46 MB/s | Amazon |
| Sandisk Extreme Plus 64GB SDXC Class 10 / U3 | 88.9 MB/s | 62.0 MB/s | 35.10 MB/s | Amazon |
| Sandisk Extreme 64GB SDXC Class 10 U/3 | 71.3 MB/s | 52.1 MB/s | 34.90 MB/s | Amazon |
| Sandisk Extreme Pro 64GB SDXC Class 10 / U3 | 89.0 MB/s | 84.7 MB/s | 34.86 MB/s | Amazon |
| Transcend 64GB SDXC Class 10 / U3 | 87.7 MB/s | 64.1 MB/s | 34.23 MB/s | Amazon |
| PNY 64GB SDXC Class 10 / U1 | 86.1 MB/s | 54.5 MB/s | 34.10 MB/s | Amazon |
| Samsung Pro 64GB SDXC Class 10 / U1 | 86.8 MB/s | 77.2 MB/s | 34.00 MB/s | Amazon |
| Lexar 600x 64GB SDXC Class 10 / U1 | 85.6 MB/s | 60.1 MB/s | 33.53 MB/s | Amazon |
| Sony 64GB SDXC Class 10 / U3 | 87.2 MB/s | 71.9 MB/s | 33.46 MB/s | Amazon |