Speed Differences in Mid-2014 rMBP (256GB v. 128GB)

[Kaenon]

I've heard a few people say that the 256GB SSD is faster than the 128GB version. Is it a different manufacturer, etc.? Can anyone please explain the difference for me?

I bought the 128GB but I probably should upgrade. Confidence in an additional speed boost would be nice.

Thank you!

 

[Freyqq]

It's really simple if you know what RAID 0 is. Basically, SSDs work by using chips that store data in parallel. It's easier for a manufacturer to buy a bunch of the same chip and just stick more chips onto the circuit board to add more storage. So, the larger the SSD, the more chips it has on it. The more chips, the greater the speed, as there are more chips to work in parallel to each other.

 

[Kaenon]

Thank you much!

 

[TechGod]

It's really simple if you know what RAID 0 is. Basically, SSDs work by using chips that store data in parallel. It's easier for a manufacturer to buy a bunch of the same chip and just stick more chips onto the circuit board to add more storage. So, the larger the SSD, the more chips it has on it. The more chips, the greater the speed, as there are more chips to work in parallel to each other.

I see the reasoning behind using that RAID 0 as an example, but of course this is a simple explanation.