That speed is about what would be expected with 2 x 128 GB chips (or maybe a bit more on the write), and yes there are always large variations with Disk Speed Test.
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SSD speed vs size
- Thread starter Guenter
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Blackmagic Speedtest is simply not good at doing what it does. You run a few passes and it doesn't average them out for you, only showing the latest run. And then some people stops at the wrong time as the needle is still moving. But Blackmagic is the most recognisable and the UI looks pretty, so people just use it.
The system was likely indexing and downloading iCloud data in the background when you first ran it.
Could you do a rerun with AmorphousDiskMark instead?
I'm only seeing about 2500, both read and write, using blackmagik's test on my new M4, but I'll give it a try again in a bit, filevault may still be doing its thing, icloud still downloading, and spotlight may still be doing initial indexing
For the use I expect for this machine those speeds are fine, so not bothered, but it is interesting that it's substantially lower than it seems other folks are seeing. We'll see what it looks like in a bit.
A new test with DiskMark - M4 Pro (base) 512GB
What file size did you set up? I've gotten different results using 1GBi vs 5GBi. 1GBi gets around 2.9GB/s writting speeds, while 5GBi gets around 2.1GB/s writting speeds. Reading is almost the same using 1GBi either 5GBi
Wow! Hopefully the 512 and 1TB configurations will be this fast overall. On the regular M4, I mean.
Mine is the regular M4, just the 512gb config because i was afraid of the slow speed possibility with 256.
Decent speeds, would probably be faster testing with AmorphosDiskMark
Hopefully my 1TB will be at least this good.
So frustrating that the base models have been in hands of users for 18+ hours but few people are benchmarking the SSDs. I finally got mine and I'm posting my results for the base M4 256GB. The lower BlackMagic score is for the default 5GB test size, the higher score is for a 1 GB test size.
I'm picking up a base M4 with 24 GB RAM and 512 GB storage right now. I'll post results when I get home.
It's going to be more than what I need, I'm sure, but if M4 Pro is twice as fast... I may end up returning this.
It's going to be more than what I need, I'm sure, but if M4 Pro is twice as fast... I may end up returning this.
Based on the data posted here so far it looks like you need a M4 Pro chip with any storage to hit 6000/4000 while the regular M4 is 3000/3000 regardless of 256/512
Some M4 512 GB machines are getting about 4600/3000.
This statement is not acurate. 256 is slower than 512. Some people are testing using 1GB file size instead of 5GB, and some kind of cache on the SSD makes results better than real performance.
256 are getting around 2GB/s and 512 are getting more than 3GB/s
Maybe. In read performance are almost at the same level, a little bit faster 512. But in write performance, 512 is way faster.
Different size NAND modules on M4 vs M4 Pro which explains the speed differences
Would need to see a teardown of a 512GB SSD from the regular M4
Would need to see a teardown of a 512GB SSD from the regular M4
I betcha a bunch of people are testing while the computer is still indexing and downloading from iCloud.
No, it’s 2 NAND chips. Even 2 TB would be 2 NAND chips on the M4 non-Pro.
From the Tom's Hardware article (M4 512 vs M4 Pro 512)
M4 512 is barely faster than the 256 data posted here. Almost 2x on M4 Pro with 512 though
M4 512 is barely faster than the 256 data posted here. Almost 2x on M4 Pro with 512 though