PNY 512GB Elite Performance Class 10 SDXC Card

Great card, delivers the promised speed of 95mbps. Sequential read speed is right at the advertised speed, and the write is lower (as expected) at around 45mbps. Still a very good number for a SDXC card at this price. If you plan on using this for a Raspberry Pie or similar, I would look elsewhere however, the random 4k read and write are quite slow. Used for a video camera or even a DSLR this won’t matter, but for an OS type scenario you’ll notice it. Overall a fantastic card and worth every penny of 44 bucks. Ran Crystal Disk Mark 5.1.2 with Transcend USB 3.0 Card Reader (TS-RDF5K) on a USB 3.0 port.

The results are quite interesting. You’ll see that this SD card is actually faster than most hard drives. Random read 4k is at 1542 IOPS (a fast disk drive will yield 150-200 IOPS). Random Read is nearly the same on 4k, both great numbers for an inexpensive SD card. The card is rated at UHS-1 U3 and should work well for 4k recording.

Sequential Read (Q= 32,T= 1) : 94.568 MB/s
Sequential Write (Q= 32,T= 1) : 66.713 MB/s
Random Read 4KiB (Q= 32,T= 1) : 6.316 MB/s [ 1542.0 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 1.090 MB/s [ 266.1 IOPS]
Sequential Read (T= 1) : 93.592 MB/s
Sequential Write (T= 1) : 44.869 MB/s
Random Read 4KiB (Q= 1,T= 1) : 6.193 MB/s [ 1512.0 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 0.855 MB/s [ 208.7 IOPS]

Very happy with the product, will purchase more.

Note: You’ll see people have different read/write speeds on these cards. A lot of it has to do with the testing platform. Mine:
X5650 @4.2ghz
48gb DDR3
500gb 850 pro SSD
Asus Sabertooth x58
Transcend TS-RDF5K USB 3.0

Es de lo mejor que hay, solo tengo excelentes reseñas de esta memoria, si quieres algo confiable para tus eventos ya sea foto o video o abmas y tener esa tranquilidad que la memoria no te va a fallar es tu opción, eh realizado entrevistas de 2 horas con esta memoria grabando a 4k 60 fps con una panasonic hx-c1000 y sin problemas, me atrevo a decir que es la mejor del mercado por ese precio, me costo unos $325 pesos mexicanos cada una, me compré un par, me arrepiento no haber comprado más, ahorita por el precio del dolar subieron muchisimo, pero en general un excelente producto. Sin duda recomiendo este modelo

good quality and value for money.

I got this card about 10 days ago and have used it extensively. I was particularly interested in its U3 speed rating, since I shoot lots of 4K video at a speed of 100 Mbps (I use a Panasonic ZS100 camera). So far, this 128GB PNY SD card has worked perfectly, with no hiccups or problems. Even with 4K video at 100 Mbps, it can hold a LOT of video.

Good price and no glitches — excellent product.

June 2, 2016 edit: I’ve now used this card for a month, extensively shooting 4K video. There has not been one glitch with this card — excellent performance at a great price.

May 19, 2017 edit: The record lock slider on this SD card fell out around May 1, 2017. Granted, I use my camera a lot and have this SD card in and out often. Still, once the record lock slider fell out, I could no longer shoot stills or videos… I could only read what was already on the SD card. I contacted PNY’s customer service, which said to provide proof of purchase (my Amazon invoice) and to send it back. I just received a replacement SD card, which is the second photo below. I was disappointed that the first SD card failed, but PNY came through promptly with a replacement — good for PNY!

Ordered this from Amazon/PNY. It came it the well-known PNY-branded packaging that read “up to 95 MB/s.” I confirmed that it does READ at 95 MB/s. I also confirmed that it was indeed a 128 GB memory card, (which shows up as 119 GB depending on how you count what a GB is).

EXPLANATIONS.
1) Why do some people document much-slower-than 95 MB/s read time? Well, because it depends on how your device is interacting with it. If you copy one ginormous file, say, 64GB, and it is written sequentially without fragments, and your device is dedicated to NOTHING BUT transferring the file, then you will see 95 MB/s read time. What if you’re moving 64GB worth of data, but it’s spread out among 200,000 files? Then every time you start to read and copy a new file, the device has to search for the filename in the file allocation table, (FAT), get the address of the file, and then go to that address, and follow pointers wherever that file is physically stored, jumping around as necessary. When it gets to the next file name, it will stop, go to your drive or memory where you’re copying it TO, make a new entry in your FAT table, (okay, this is the somewhat simplified version), and then go back to the memory card and search, etc. IN SHORT, the greater number of files and folders you have, and the more scattered, (fragmented), those files are, then the more time the device will spend searching, writing file names, i.e., things OTHER THAN transferring data. That will report as a slower effective transfer rate, even though the memory card is performing at 95 MB/s. SECONDLY, if the device is doing other things on its bus, then clearly transfer time will slow down. Every time the device performs a task, it is reading/writing to/from memory locations, which require transfers over the bus. Somewhat simplified, but the bus is like lanes of traffic. Even if the memory card is reading at 95 MB/s coming out of its own parking garage and driveway, if the interstate (the device’s bus) is clogged up with traffic from watching a movie, searching on the Internet, scanning for viruses, etc., then the data from the card is not going to arrive at 95 MB/s, even though it’s capable of pumping the data to the interstate (bus) that fast.

2) WHY ONLY 119 GB? DID I GET RIPPED OFF?
No.
Remember, computers only know 2 numbers (or states: on or off). They follow a base-2 system. Let’s start by asking what is a kilobyte? Every grade-school kid who learns the metric system knows it’s a thousand bytes. They are right. Sort of. To a computer, a kilobyte is 2^10 bytes. Count it out with me: 2, (times 2 is), 4 (times 2 is) 8, 16, 32, 64, 128, 256, 512, 1024. To a computer, a kilobyte is 1024 bytes, not 1000 bytes. So what is a megabyte? In common parlance, it’s a million bytes, 1,000,000 bytes. But to a computer, a megabyte is 2^20 bytes. Count it out with me, starting with a kilobyte: 1024 (times 2 is), 2048 (times 2 is), 4096, 8192, 16384, 32768, 65536, 131,072, 262,144, 524,288, 1,048,576. So to a computer, 1 MB is 1,048,576 Bytes, even though we say it’s 1,000,000 Bytes. A gigabyte (GB) is what we commonly call a billion bytes. But to a computer, instead of 1,000,000,000 B, a GB is actually 1,073,741,824 B. What we call 128 GB means 128,000,000,000 Bytes to us. But to a computer, 128 GB is 2^37 B, which is 137,438,953,472 B. So when you purchase 128 Billion Bytes of storage, you can call it 128 gigabytes, where “giga-” means “a billion.” To understand how many “computer GB” this is compared to “human GB,” simply divide by the ratio of 2^37 to 128 Billion, which is 137,438,953,472 divided by 128,000,000,000. You shoudl get 1.073741824. And when you divide it into 128 Billion Bytes, you get 119.2092896, which rounds to 119 GB (computer GB). SO YES, YOU PURCHASED 128 BILLION BYTES of memory, or 128 GB, which THE COMPUTER SHOWS AS 119 GB.