However, there are still old versions of the Lexar633x SD cards available on the market that display the incorrect U3 rating symbol. For example, the Lexar 633x was initially launched as U3 but the new production of the Lexar633x are now listed as the correct U1 since the card only achieved about 25MB/s rather than the 30MB/s minimum for a U3 rating. Some SD cards that advertise U3 do not actually have the speed requirements denoted by the U3 symbol.
Use of cards not on the list, especially SanDisk Ultra cards, will greatly increase your chance of trouble with your setup. You are strongly advised to use a micro SD card from the recommended list on GoPro's website. We have found that the most common compatibility problems are due to the type of SD card being used. I ordered a 1TB MBP but would have preferred a 2TB SSD but the lead-times were too long for me to wait.What type of SD card are you using? How fast is it? The problem with SD-Express is that they aren't backward compatible with UHS-II ie put a SDe card in a UHS-II slot and the speed goes back down to UHS-I speeds :-( That said, CFe Type B cards are slightly bigger but much faster and are shipping in bulk with capacities up to 1TB from multiple OEMs. UHS-III cards will never hit the market as SD Express will be the next step. That said, given the cost of the laptops we're talking about here, it's a bit of a disappointment that they don't have an "ultra" version, for those who can afford it and want to add reasonably fast storage rather than just cheap storage.Ĭlick to expand.I use UHS-II cards for my Canon R5 camera so it is a perfect match for my new 16" MBPĭifferent websites have tested the fastest SD cards and there are at least 10 that are faster than 250MB/s write speed and mine is a Sandisk 128GB link below confirms that Apple says it will cope with 250MB/sĪs UHS-II cards/slots have a second row of pins, it may not be possible to fit in a micro-sd in an almost flush package ie it needs a custom device for the purpose. Name-brand UHS-II cards with high write speeds usually cost five times more than UHS-I cards (Transcend's own UHS-II cards are on the order of $1/GB), so the price probably would be 5x higher for the same capacity if these could max out the slot. As far as I can tell, the (off-brand) flush-fit 3rd party micro-SD adapters you can buy right now are also only UHS-I, so wouldn't fare any better no matter what card you put in them. Since the JetDrive Lite 330 is a UHS-I card, it's much cheaper but its speed is limited by that interface. That's very close to what I got timing a large Finder copy, so matches real-world performance, and suggests to me that Transcend is just being honest about the speed of these UHS-I cards.Īll of which is a long way to say that, now that I'm actually thinking about it, my statement was half-wrong I wasn't taking into account the interface. Blackmagic Disk Speed Test showed 66.5MB/s write and 89.5MB/s read.
#Blackmagic disk speed test sd card pro#
I don't own any UHS-II or III cards, but I did try a 128GB SanDisk Extreme Pro 128GB UHS-I card in mine. Now that I look at it the test they were doing was a "JPEG copy test," so the ~121MB/s they got may well be the read-write roundtrip speed, which would mean the actual read/write speed was roughly double that. They were testing with an Angelbird AV Pro V60 UHS-II card.
I didn't save the link, but I believe this was the review I got that number from.
0 kommentar(er)
