Why can’t we just use SSDs with 128GB as RAM on our Computers? It seems way better than 8 or 16 GB.
In: Technology
Others have already mentioned the data transfer speed difference. But that matters only when you are moving largeish amounts of data.
But the processor needs to access data constantly as it does processing. But this data is very small. For example a single number.
So accessing data fast is very important.
On SSD acces time is some millisecond (google says 5-10 ms).
On RAM acces time is some tens of nanoseconds.
One mllisecond is 1000000 nanoseconds. It takes almost million times longer to taccess data on SSD compared to RAM
The name RAM stands for Random Access Memory. Being able to quicly access any part of the memory is important enough property that the thing was named after it.
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