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Question about SSD storage sizes

post #1 of 4
Thread Starter 
So i was looking at all the shiny ssds at microcenter and began began to wonder why do certain brands go with 64/128/256 etc... sized models?

I know these numbers are just 2^6 2^7 and 2^8,
like in the cpu's address bus (as an example, not relating to ssds) if 2^2 it would allow 00 01 10 and 11 resulting in 4 addressable memory locations.

further in the data bus each increase in width or speed would result in an increase of 1 byte or 8 bits, so a 64 bit data bus is 8 bytes.

so i guess my real question has shifted to why I see so many 16's 32's and 64's all the time?....specifically in ssd's.

is it just due to the fact that 1 byte=8 bits? it can't be that simple....
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post #2 of 4
Quote:
Originally Posted by Forrester View Post

So i was looking at all the shiny ssds at microcenter and began began to wonder why do certain brands go with 64/128/256 etc... sized models?
I know these numbers are just 2^6 2^7 and 2^8,
like in the cpu's address bus (as an example, not relating to ssds) if 2^2 it would allow 00 01 10 and 11 resulting in 4 addressable memory locations.
further in the data bus each increase in width or speed would result in an increase of 1 byte or 8 bits, so a 64 bit data bus is 8 bytes.
so i guess my real question has shifted to why I see so many 16's 32's and 64's all the time?....specifically in ssd's.
is it just due to the fact that 1 byte=8 bits? it can't be that simple....

It actually is that simple. The actual storage NAND chips are manufactured with those powers of 2 in mind, so you may have 8GB or 16GB memory chips for example. When they make the SSD out of these chips, they usually make them multiples of these chips because it's more practical. It's not strictly required though. They actually do make some SSDs in between though. I've seen 48GB and 96GB SSDs before.
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post #3 of 4
Thread Starter 
Quote:
Originally Posted by LemonSlice View Post

It actually is that simple. The actual storage NAND chips are manufactured with those powers of 2 in mind, so you may have 8GB or 16GB memory chips for example. When they make the SSD out of these chips, they usually make them multiples of these chips because it's more practical. It's not strictly required though. They actually do make some SSDs in between though. I've seen 48GB and 96GB SSDs before.

+1
so, are there advantages to these 2^x (x being an integer) gb ssds?
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post #4 of 4
Quote:
Originally Posted by Forrester View Post

+1
so, are there advantages to these 2^x (x being an integer) gb ssds?

I'm not entirely sure about advantages, but most SSD manufacturers actually buy the NAND chips from other companies, so these manufacturers are limited to what is made, and that's usually chips in these capacities. There's little point for companies to make various sizes of NAND, they usually make them on different tiers to cover different price ranges. Just like RAM is made in intervals of 2^n. My guess is the advantage would be it's practical. A manufacturer would be wasting money making 64GB, 72GB, 80GB, 88GB, 96GB, etc drives because they would all require separate manufacturing lines and there's just no practical point.
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