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2018 MacBook Pro Has Fastest SSD Ever

laptopmag.com

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Re: 2018 MacBook Pro Has Fastest SSD Ever

#4

Post by bgentry »

nodesocket wrote: post #2

Something I noticed that is interesting is the 13" models run 2133MHz LPDDR3 while the 15" models run 2400MHz DDR4. Both are 8th generation Intel's. Does that mean they run different chipsets?

This was a necessary tradeoff in order to offer 32GB RAM in the 15" machines. After years of delays, Intel's chipsets still do not support LPDDR4. It's possible that it's still the same chipset on both machines, though.

Re: 2018 MacBook Pro Has Fastest SSD Ever

#5

Post by nodesocket »

bgentry wrote: post #4
nodesocket wrote: post #2

Something I noticed that is interesting is the 13" models run 2133MHz LPDDR3 while the 15" models run 2400MHz DDR4. Both are 8th generation Intel's. Does that mean they run different chipsets?

This was a necessary tradeoff in order to offer 32GB RAM in the 15" machines. After years of delays, Intel's chipsets still do not support LPDDR4. It's possible that it's still the same chipset on both machines, though.

So the 2400MHz DDR4 is obviously faster because of the increased bus speed right? LP just mean low power.

Re: 2018 MacBook Pro Has Fastest SSD Ever

#7

Post by phren0logy »

brianpgordon wrote: post #3

> 2018 MacBook Pro Has Fastest SSD Ever This title is misleading. I have a faster SSD in my year-old home desktop. They say in the article that they mean the fastest SSD they've ever seen in a production laptop.

Really? Faster than 2,519MB/s? I thought they were achieving this by ganging together 2 drives via their proprietary T2 chip.

Re: 2018 MacBook Pro Has Fastest SSD Ever

#9

Post by dogma1138 »

brianpgordon wrote: post #3

> 2018 MacBook Pro Has Fastest SSD Ever This title is misleading. I have a faster SSD in my year-old home desktop. They say in the article that they mean the fastest SSD they've ever seen in a production laptop.

No you don’t, that speed is for an OS level copy not the advertised max seq write speed.

I have the 960 pro in raid and I don’t get more than 2000-2200 MB/s when copying a files of that size on an actual file system.

Based on the copy speed vs advertised speed I would put the max seq write speed of that drive at least in the 3000 MB/s range this is at least as fast as the 970 evo in its largest capacity if not faster since Apple tends to use Sammy SSDs I’m betting that this is a newer version of the PM981 which might some day be released as the 980 evo or even pro.

Re: 2018 MacBook Pro Has Fastest SSD Ever

#10

Post by TheKnack »

phren0logy wrote: post #7
brianpgordon wrote: post #3

> 2018 MacBook Pro Has Fastest SSD Ever This title is misleading. I have a faster SSD in my year-old home desktop. They say in the article that they mean the fastest SSD they've ever seen in a production laptop.

Really? Faster than 2,519MB/s? I thought they were achieving this by ganging together 2 drives via their proprietary T2 chip.

They admit in the article that a lot of this performance could be an illusion caused by the APFS instant cloning feature, which essentially just creates a new directory listing pointing to the existing file when you copy a file to the same volume. A separate copy of the data is only made when you make a change to one of the files.
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