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For Lexar Professional 1667x SDXC, 116 customer reviews collected from 2 e-commerce sites, and the average score is 4.3.

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17.2.2020

Short review: This is a great card for 4K video. I bought the 128GB version, which at around £35 for a V60-rated card, seemed to offer excellent value for money at the time of purchase.Longer review and explanation: SD cards are a flipping nightmare until you get your head around them. There are all sorts of speeds claimed for cards, but there are basically three standards that cards can claim to adhere to. (Source the Secure Digital website, and as they set the standards, they ought to know.)Speed class: C2 - 2MB/sec, C4 - 4MB/sec, C6 - 6MB/sec & C10 - 10MB/sec.UHS Speed class: U1 - 10MB/sec & U3 - 30MB/secVideo speed class: V30 - 30MB/s, V60 - 60MB/s & V90 - 90MB/s.There are also three bus standards: UHS-I,UHS-II & UHS-III. (Good luck finding a UHS-III device or card, just now!)This card is UHS-II bus card, and is backwards-compatible with UHS-I bus devices. You can tell it's a UHS-II card, because it has a second row of electrical contacts. (See pic) UHS-I devices won't have connections for the second row of pins, so this card will work at UHS-I speeds for UHS-I devices.It has the following speed ratings, by which it claims a compatible device is able to write to this card at these speeds:-C10 - 10MB/s for all devices.U3 - 30MB/s for UHS devicesV60 - 60MB/s for UHS-II devices.The 250MB/s headline figure on the card is the maximum read speed the card can manage, in a compatible card reader. If you want to write to this card, the maximum speed it promises to be able to sustain is 60MB/s in a UHS-II device. It might write faster if you're lucky, but it must be able to sustain 60MB/s to be able to wear the V60 logo.Oddly, while card speeds are quoted in MB/s (megabytes per second), camera bitrates are quoted in mb/s (megabits per second). There are 8 bits in a byte, so this V60 card speed of 60MB/s is the same as a camera bitrate of 480mb/s. That's as much as you need for 4K video. Even on a Panasonic GH5 in 4K video at the maximum bitrate of 400mb/s (50MB/s), it should work perfectly well at this card which is rated at 480mb/s (60MB/s). If it doesn't work in your GH5 at 4K 400mb/s, the card is faulty, and should be returned.I use this card in a G80 which has a bitrate of 100mb/s (a fairly stately 12.5MB/s). Even the G9 top bitrate is only 150mb/s at 4K 60FPS (18.75MB/s) which is not a problem for this card at all. The high read speed of the card is useful for transferring data off the card onto my PC. (In a UHS-II card reader)So for around £35 you can have an excellent quality 128GB UHS-II card that is perfect for 4K video, which I think is a pretty good buy. You could splash out for the gold Lexar Professional 2000x 300MB/s card, but it's a lot more money, and for video you really don't need it.
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9.9.2019

To my mind the key things any user of an SD card are weighing up are: speed, reliability, competitive price, storage capacity, compatibility with potentially a wide variety of cameras and/or video cameras, and a reputable brand. With a significant number of competing products to choose from all ostensibly doing the same job which feature or features matter most to you will likely have significant bearing on your choice of card. This Lexar™ 64GB SDXC card is certainly not at the cheaper end of the market for those for whom price is the biggest factor, costing over £24. The SDXC marker indicates that it is "Secure Digital eXtended Capacity", allowing full 1080HD recording and, as indicated on the packaging,is suitable for the emerging 4K standard of video camera too. At 64GB that's an awful lot of memory, although this is the smallest capacity of an SDXC card. However you might find using a larger capacity you run out of battery life first. Using an 1080HD video camera I've had two memory cards by other manufacturers fail within a year, so am pleased to see this card comes with a 10 year warranty. Filming an event and getting home to find that the card has corrupted and all files are inaccessible means that I've stopped purchasing based on price alone.The card works on the UHS-II read mechanism with a claimed speed of 250MB/s, which with only a UHS-I device is a little more than I need but thankfully this card is backwards compatible, which is a useful feature for me. If transfer speed is important to you for e.g. action photography, operating the shutter multiple times to capture a series of action shots then this feature means it's fast - the maximum for this standard is however 312MB/s but this is towards but not at the top end. I'm also attracted to the reputable and recognisable brand name, something that gives me a bit of comfort that this is high end, indeed branded with the word 'Professional' you'd expect high performance as a given.I found the picture quality sharp as I could hope for. However one negative was that for personal convenience (rather than keeping tabs on a variety of different connecting cables) I tend to use a USB SD card reader B0047T6XWY Integral AMINCRSD SD (Secure Digital) Single Slot Reader to transfer files to my laptop - this steadfastly refused to work, indicating some compatibility issues. With older SD cards I use I have no such issues. The reason I wished to try this out was to perform an A/B comparison with the source file, but that was not possible. Nevertheless this appears to be a good quality product from a known supplier and for anyone valuing speed over cost this is certainly a good option.
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14.9.2019

I tend to use full-frame DSLRs that still use the CF card as standard but mine now come with a SD slot for secondary copies of images being shot. I also use a mirrorless SONY pocket camera sometimes which uses SD cards.I tried it first in my SONY A6000 camera, flipped the camera into hi-speed burst mode and held down the shutter until the camera's internal buffer was full, that's around 20-25 shots at about 25MB per image as I always shoot in RAW format. The buffer filled and I timed the buffer to card, the buffer emptied in around 8-10 seconds which wasn't too bad.Next I filled the buffer but continued to hold the shutter down and even while the buffer was emptying to the card I was stillable to keep shooting 1-2 images a second contiuously all the time the buffer was being written back to the card.Next I tried video, put the settings up to max resolution and just made sure that the video was written without stuttering, the write indicator was blinking on the camera which meant the video stream wasn't continuous, the camera's was buffering and feeding video data to the card in a nice steady stream. I played it back on my PC and it was fine.While I tend to shoot quite slowly using my DSLRs I might well invest in a couple more of these. I've never ( touch wood! ) lost a CF card to corruption but as an IT techie I know it will happen, the law of averages means my luck will run out one day and knowing there's a back SD card duplicating my shots would give serious piece of mind. I only use 8GB max size CF cards while shooting, a trick I learned from a wedding photographer, small cards mean you change cards more often and if a card blows out on you then you still have something from the other cards. Having this monster SD card means I can keep changing my CF cards but I have continuous backup card in the camera, lose a CF card then it's no biggie.Very pleased with this card, it does what it says. I'm not after the max speed, I simply need to ensure that a memory catches my images, keeps up with my shooting rate and doesn't fail. I only ever use Sandisk and Lexar cards and I will certainly be buying a couple more of these cost effective cards for use as live backup cards in my DSLRs.
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9.9.2019

To my mind the key things any user of an SD card are weighing up are: speed, reliability, competitive price, storage capacity, compatibility with potentially a wide variety of cameras and/or video cameras, and a reputable brand. With a significant number of competing products to choose from all ostensibly doing the same job which feature or features matter most to you will likely have significant bearing on your choice of card. This Lexar™ 64GB SDXC card is certainly not at the cheaper end of the market for those for whom price is the biggest factor, costing over £24. The SDXC marker indicates that it is "Secure Digital eXtended Capacity", allowing full 1080HD recording and, as indicated on the packaging,is suitable for the emerging 4K standard of video camera too. At 64GB that's an awful lot of memory, although this is the smallest capacity of an SDXC card. However you might find using a larger capacity you run out of battery life first. Using an 1080HD video camera I've had two memory cards by other manufacturers fail within a year, so am pleased to see this card comes with a 10 year warranty. Filming an event and getting home to find that the card has corrupted and all files are inaccessible means that I've stopped purchasing based on price alone.The card works on the UHS-II read mechanism with a claimed speed of 250MB/s, which with only a UHS-I device is a little more than I need but thankfully this card is backwards compatible, which is a useful feature for me. If transfer speed is important to you for e.g. action photography, operating the shutter multiple times to capture a series of action shots then this feature means it's fast - the maximum for this standard is however 312MB/s but this is towards but not at the top end. I'm also attracted to the reputable and recognisable brand name, something that gives me a bit of comfort that this is high end, indeed branded with the word 'Professional' you'd expect high performance as a given.I found the picture quality sharp as I could hope for. However one negative was that for personal convenience (rather than keeping tabs on a variety of different connecting cables) I tend to use a USB SD card reader
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12.8.2019

Lexar Professional 1667x 64GB SDXC UHS-II Card64GB – Class 10, UHS-II (U3), V60The coded specifications printed on memory cards always seemed confusing to me and unfortunately this trend continues.“UHS-1" or more accurately "UHS-I"  stands for "Ultra High Speed"UHS-II is not categorised as Class 2 as you would expect but U3.This card uses UHS-II technology (UHS Speed Class 3 (U3)) for high-speed performance.This card is rated for speed as 250 Megabytes per second (MB/s)It does confusingly say it is backwards compatible with UHS-I devices, performing up to the maximum thresholds of UHS-I speed capabilities.Warning..Be aware that your camera or device does need to accept exFAT format that allowsSDXC to accept large file sizes in my case with my camera only SD or SDHC cards below 32GB capacity work and this card is not compatible as suggested.Do not insert the card and use the device to Format the card if you are not sure of compatibility.The card is overkill for most uses, but essential if you’re shooting 4K video with your deviceLooking at past reviews of Lexar cards are very variable with a number failing in very short time periods.The company itself has had to close and start again so I hope reliability is now improved.This at 64GB is the smallest capacity in the range of 3 sizes for this card.SDHC cards offer a capacity between 4GB to 32GB and SDKC offers more than 32GB.To make best use of the speed of this card you obviously need a SDXC UHS-II compatible device.The cards may not work with older, non-UHS-I or II devices, but if they do it should perform at Class 10 so sustained writing at 10MB/s or better.The 1667x printyed on the card is the rather outdated speed measurement compared to the read speed of an audio CD.
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9.5.2020

This card seems to work perfectly for 4K movie recording at 400Mbps and also for the in-camera playback of those files.I saw a lot of reviews of SD cards for the Fujifilm X-T4 (and X-T3), arguing that it was necessary to buy a 'V90' card for the 400Mbps 4K recording mode.Clearly, V60 is actually fine for recording 400Mbps, but looking a bit deeper, it seemed another significant issue is not only the recording speed in-camera, but also the in-camera playback of those recordings. Apparently this can result in errors if the card isn't quick enough. From what I've found so far, I can say this card records flawlessly and also allows perfect playback of the recorded files!All for less than half what the recommended V60 cards would cost, and a quarter of the V90 cards. Brilliant!Clearly, professionals and serious video shooters may find better value proposition from the various pro-level V60 and V90 cards.
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13.3.2020

Thought I'd try this in my A73 as I seemed to be waiting too long for my current card to empty the camera buffer when full, primarily for stills. This Lexar Pro is around 30% quicker i.e. it takes 17-18 seconds compared to 25-26 seconds with my original card which is rated at 100mb/s read, 70mb/s write and is the UHS-1 variety. This Lexar, which is a UHS-2, 80mb/s write and 250mb/s 'transfer' speed - whatever that might be - is definitely quicker, not lightning fast but in my opinion good value for non-professional photographers like me. There are faster cards out there but most come at a price that I don't want to pay so I'm more than happy with this one currently costing £20.99 for the 64Gbcapacity version.
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14.8.2019

Fast memory card for time sensitive cameras like Digital SLR cameras writing RAW photos at breakneck speed.This allows you to rapid shoot an action sequence without waiting for the camera to write to the card.It doesn't really make any difference to a decent computer to read/write as they have faster processors anyhow; but in the field it is a winner.A decent little plastic carrier would be useful, after all on a long job, you may have to swap out cards for different jobs and a protection sleeve would be REALLY HELPFUL Lexar marketing!I still use my 10 year old Sandisk plastic carriers.Keeps the dust and fluff off the card contacts in the camera bag.

17.8.2019

I have been using Lexar memory cards for many years now (along with some SanDisk) and never run into any issues whilst using them, they are a really good quality brand.The UHS-II SDXC are blazingly fast when used in compatible devices, such as the Sony A7III memory card slot 1. The amount of photos I can take in RAW on continuous mode with a UHS-II compared to a standard SDXC car is like night and day.Only downside are UHS-II cards are a bit more pricey, but if you have a compatible slot in your device and are shooting sports, wildlife or filming high-resolution video, it is most definitely worth the extra price.

10.6.2020

I brought this card specifically for video recording on my Sony AR7III camera in order to record 4K video. I purchased due to the write speed and that it was a UHS Type II card. It's performing as expected, and is handling the video with no issues. It will also probably become my default card for sports photography, simply due to the fact when you taking 10 fps, 42MP RAW images, the faster the better to clear the camera buffer! Just make sure the device you intend to use this in and any card reader can handle UHS-II cards. Also, if you don't need high speeds, then save money and by a card with lower specifications.

17.8.2019

I feel this is fantastic high-grade, high-end SD card, but I wasn't able to fully evaluate it. It seems you need to have a UHS-II device to be able to use it at the speeds it claims. Of course, I don't have that capability on my laptop. The transfer speeds were about 26MB both up and down - so I think that has more to do with my laptop's SD-card port, than the card. If you're a professional photographer shooting 4K video with a high-end camera it sounds like this is perfect, although 64GB might not last that long.Although I can't fully appreciate the higher speeds, it's still very useful as an SD card.

21.8.2019

I’ve used this Lexar UHS-II card in my Olympus Pen (EP5) for still photography only, not video, so you might well argue that I’m not getting the full benefit. However, I do nonetheless appreciate the huge memory and rapid file transfer (both via my laptop SD card slot and wireless upload to a smartphone). Whilst the card is not cheap, given the huge capacity I think it’s still decent value. Packaging is smartly minimal but slightly tricky to get into. Like other reviewers I would have appreciated a plastic case to save having to stuff the card into a pocket or bag uncovered when it’s not in the camera.

17.8.2019

Today I am reviewing the Lexar 64gb Card.To start with I’m pointing out some key points. Captures high-quality images and extended lengths of stunning 1080p Full-HD, 3D, and 4K video.There is High-speed file transfer from card to computer which dramatically accelerates the speed of my workflow.Another key point I would like to highlight is for versatility, the cards are also backwards compatible with UHS-I devices, performing up to the maximum thresholds of UHS-I speed capabilities. The cards also work with older, non-UHS-I devices, performing at Class 10 speeds.

1.12.2019

I have always been a fan of the Lexar brand and have a number of their SD and CF cards for my cameras and although I didn't desparately need to buy another, this speed at the price I paid was irresistable. Although I mainly shoot stills, when shooting wildlife in RAW, the faster the card the more shots you are likely to get before the cameras buffer fills up, it does make a significant difference when burst shooting at 10 fps.I also do shoot some video and when you start shooting at higher rates in HD or 4k, fast memory cards are a must.

17.2.2020

I purchased this SD card for use with a GH5, and although it claims to write fast enough, it can't seem to cope with the highest bitrate 4K or 6K. I reccommend purchasing a different SD card if you are using the GH5 professionally, or need the highest quality 4K/6K.Other than that, is a solid SD card, and has been working fine for the 3 months that I've have it for.Consistently seems to achieve 95-100MB/s write speed, and 248-250MB/s read. (Tested using a video file and a SanDisk ImageMate PRO card reader)

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