Money pro for mac 1.8.135/18/2023 ![]() I think that SD cards are great to store additional data like music or images on a minimum size, but if it comes to speed, we need to wait for products with further improvements reaching the market. However, a real HDD or SSD drive connected on USB 3 or TB 2 would make more sense if you are seeking speed. Installing Bootcamp an a SD isn't supported by Apple, but there might be ways to get this done. ![]() Occasionally, the port won't recognize the SD card until the card is plugged for a second or a third time. SD cards can be swapped similar to USB Thumb Drives. The 170 MB/s read speed of the Sandisk model needs a compatible device and is likely getting trimmed at least to 104 MB/s on a MBP 2015 internal card reader. AFAIK, right now Lexar (95MB/s read, 70MB/s write) and Sandisk (90 MB/s write and 170MB/s read) are the only companies offering an UHS-I SD card with a maximum size of 1 TB. As the internal drive is much faster than 104 MB/s, I don't think, it would be the same experience.įurther, the SDXC standard defines sizes of up to 2 TB. IMO, that should mean that an UHS-I card, declared as UHS104, with a maximum speed of 104 MB/s would be the fastest SD card that the MBP 2015 can utilize, but I didn't test that on my 2015 15" 2,8 GHz MBP internal SDXC card reader. Apple writes, that UHS‑II works with an iMac Pro only. Writing this, I realized, that I've just been using UHS-I cards with a maximum speed of 90 MB/s, that in practice is resulting in peaks of 60 MB/s write and 90 MB/s read.Īs the MBP 2015 internal SD card slot is SDXC (SD 3.0), I guess you won't get the SD spec 6.0 maximum speed of 624 MB/s read in practice. An UHS-III SD card declared as FD624 theoretically should be able to serve up to 624 MB/s and a UHS-II card up to 312 MB/s. The MBP 2015 internal SDXC port is tied to the USB port and that is physically absolutely limited to 5 Gbit/s (around 625 MB/s).
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