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Tests Show 32GB iPhone 7 Models Have 8X Slower Data Write Speeds Than Other Capacities
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He may not be the greatest tech reviewer/unboxer on YouTube but I don't find him exceptionally clickbait-ish. There are more clickbaiting douchebags out there on YouTube.
From AnandTech review,
"In general, the NAND performance of the iPhone 7 and 7 Plus is equivalent to the iPhone 6s and 6s Plus. There are some minor differences, but essentially all of them can be attributed to testing variance. The only thing that is worth noting is that there's no significant improvement to write performance even though the iPhone 7 units tested are 256GB models while the 6s and 6s Plus were 128GB models. This suggests that the NAND packages use higher capacity dies so there's no additional parallelism to take advantage of."
http://www.anandtech.com/show/10685/the-iphone-7-and-iphone-7-plus-review/4
Apparently, GSMARENA did not know of this. Do follow the link for more details. I always go by AT reviews. They actually have the depth and knowledge to understand and review.
"In general, the NAND performance of the iPhone 7 and 7 Plus is equivalent to the iPhone 6s and 6s Plus. There are some minor differences, but essentially all of them can be attributed to testing variance. The only thing that is worth noting is that there's no significant improvement to write performance even though the iPhone 7 units tested are 256GB models while the 6s and 6s Plus were 128GB models. This suggests that the NAND packages use higher capacity dies so there's no additional parallelism to take advantage of."
http://www.anandtech.com/show/10685/the-iphone-7-and-iphone-7-plus-review/4
Apparently, GSMARENA did not know of this. Do follow the link for more details. I always go by AT reviews. They actually have the depth and knowledge to understand and review.
And pretty much all storage for that matter. Even with HDD more platters means faster read and write.
That is correct. The poster said faster than a 6S.
A test of the 16GB 6S will be more beneficial.
The article you quote is comparing 128GB to 256GB models. The original article here is comparing 32GB to 128GB. To claim GSMARENA doesn't actually have the depth and knowledge to understand when you're missing such an important detail?
Note, that 60MB/s limit for USB 2.0 is theoretical. Real-world, it tops out at around 40MB/s. SATA3 6Gb/s tops out at around 550MB/s.
By the way, based on the transfer times for the aforementioned 4.2GB video, transfer speed on the 32GB model was ~19MB/s and on the 256GB was ~28MB/s.
Is there a teardown of the iPhone 7 yet? What NAND does it use and what interface? Most screenshots I've seen using iOS benchmarking apps have inconsistent results leading me to think some RAM caching is going on. Also, SSDs get their speed from parallelism. It's kinda hard to credit that a single 128-256GB package of TLC NAND is capable of near 1GB/s sequential read/write.
Unbox therapy is 50% sponsored content/ads and 50% clickbait drama to milk that sweet ad revenue. Doesn't matter if he talks about Samsung, Apple or other companies.
If I remember correctly, AnandTech wrote their own storage benchmark app so yes, I'd actually trust them more than GSMArena.
Well, my ignorance might be true but,
previous reviews have pointed to this long time back.
iPhone 7 Plus 32 GB 128 GB 256 GB
Read 699 MB/s 801 MB/s 868 MB/s
Write 42.5 MB/s 228 MB/s 328 MB/s
http://www.notebookcheck.net/Apple-iPhone-7-Plus-Smartphone-Review.173844.0.html
As you can see, there is a similar difference between the 128 GB and 256 GB also. But AnandTech shows there is no actual difference in performance between them.
Did anyone notice that although the write speed using that app causing the 32gb phone to be 8x slower, the 4.2gb movie write test only was about a minute longer (closer to 1.5x). If it was 8x longer, the 2:34 time from the 256gb version would be stretched out to approx 20 mins.
It appears the write speed of a large file improves dramatically compared the tiny file that app uses. I hypothesize that just initialization of the writing processes is what's really lagging 8x behind. Then it quickly improves to only 1.5x behind once it gets going.
Make sense?
It appears the write speed of a large file improves dramatically compared the tiny file that app uses. I hypothesize that just initialization of the writing processes is what's really lagging 8x behind. Then it quickly improves to only 1.5x behind once it gets going.
Make sense?
Nah. Probably the benchmark just isn't accurate enough. I looked into it and PassMark actually publishes their methodology. For the disk tests, they use a 90MB file to test disk speed. For the 32GB models, that means it took a whopping ~2 seconds to write the file while on 128GB and 256GB models, it took less than 1 second. There's a good chance accuracy isn't all that good when measuring mere milliseconds.
Extrapolating from this example:
iPhone 7 Plus 32GB 128GB 256GB
Read 129ms 112ms 104ms
Write 2.12s 395ms 274ms
Those are likely too short to get an accurate read. Yes, the higher capacity iPhones have faster storage. That's just to be expected. Quite likely not 8x, though.
This was first reported almost a month ago, even before GSMArena, here https://forums.macrumors.com/threads/iphone-7-7-plus-ssd-storage-speed-test-32-128-256gb.1998044/ where MacRumors members are posting their iPhone 7/7 Plus storage speed.
Glad to see this getting some traction. I hope it catches on and people do these tests immediately for future iPhones like how they now try to bend their new iPhones to see if it is stronger than previous generations and plaster it all over YouTube.
For comparison the iPhone 6s/6s Plus results are
Model: read/write (MB/s)
16GB: 854/45
64GB: 1701/151
128GB: 1840/279
Source: http://www.thessdreview.com/daily-n...ller-and-speed-dictated-by-device-capacity/2/
Some things to consider.
1. Why is he using the worst app possible to test this? The app he used was last updated over 4 years 4 months ago. As seen in the linked thread it does matter which app you use to test this, but more than 8x slower write speed does appear accurate.
2. What cable is he using? That one sure didn't come in the box. What port is his laptop using? For example USB 2.0 to lightning will cause a bottleneck and not be a truely accurate real world test.
Glad to see this getting some traction. I hope it catches on and people do these tests immediately for future iPhones like how they now try to bend their new iPhones to see if it is stronger than previous generations and plaster it all over YouTube.
For comparison the iPhone 6s/6s Plus results are
Model: read/write (MB/s)
16GB: 854/45
64GB: 1701/151
128GB: 1840/279
Source: http://www.thessdreview.com/daily-n...ller-and-speed-dictated-by-device-capacity/2/
Some things to consider.
1. Why is he using the worst app possible to test this? The app he used was last updated over 4 years 4 months ago. As seen in the linked thread it does matter which app you use to test this, but more than 8x slower write speed does appear accurate.
2. What cable is he using? That one sure didn't come in the box. What port is his laptop using? For example USB 2.0 to lightning will cause a bottleneck and not be a truely accurate real world test.
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In short, no.
The controller breaks up the data to spread it across the chips available in order to increase the write speed to the number of chips times the write speed of a single chip. So if a single chip is 32gb, then a 128gb model will have 4 chips, and therefore the controller will break up a song into four pieces and write each piece onto a different chip, in parallel, as each piece is written to each chip at the same time.
It would have been a scandal if my near $1000 iPhone 7 Plus 256GB was slower than the 32GB model. But that's not the case so I'll let all the cheapskates moan and cry.
This info was actually proven before on iPhones so I'm not sure what the fuss is all about.
This info was actually proven before on iPhones so I'm not sure what the fuss is all about.
To be fair 3min 40sec is not 8 times slower than 2min 34sec. A real world test always trumps some theoretical app measurement that may not take advantage of optimization routines.
Umm, NO it's not. Not 8 times slower. Maybe 10-15% slower for the smallest capacity of SSD's.
So, it took 154 seconds to download the movie file to the iPhone 265GB model. And it took 220 seconds to do the same file to the 32GB model. That's roughly 1.4 times slower, not 8 times slower. If you do that math, the 256GB iPhone only transferred the movie at 27.9 MBytes/sec (not the app stated 341 MBytes/sec or 12.2 times slower) and the 32GB iPhone did it at 19.5 MBytes/sec (not the app stated 42.4 MBytes/sec or 2.17 times slower). So where is the bottle neck in both phones? And/or is the app even accurate when it comes to calculating the WRITE speed of the storage? My problem here is, that between the app he used and the actual speeds, the iPhone 256GB model apparently had more of a performance hit vs the 32GB, based on the app he used for the benchmark.
Yes, I calculated the seconds wrong, I fixed my post. But it doesn't make anything different other than the numbers are a little better for the 32GB.
Yes, I calculated the seconds wrong, I fixed my post. But it doesn't make anything different other than the numbers are a little better for the 32GB.
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