also the whole 1000MB vs. 1024MB ordeal tooGuys, the operating systems sets aside some disk space for file names, file allocation tables, etc. This is essentially a "reference point" and tells operating system where it can find information (files) on the storage device. Of course, the larger the disk, the larger chunk of space is taken up for the file system information.
Now you talking about two two very different, types me memory.Memory (RAM) is 128MB
Drive Space is 7.4GB of usable storage space.
I know all of this already. I was answering and clarifying for the OP. He asked how much memory the iPhone had in the title, and then in the post started talking about drive space, which is a common mixup among the less knowledgeable PC users.Now you talking about two two very different, types me memory.
RAM is very "dynamic" in nature and very fast. Your hard drive on the other hand tends to be "static" - all though data is written to and from the hard disk (static), when you power down, the data is retained whereas in RAM, it's not retained (it's lost).
Data is written to/from the your hard disk, buffered in RAM (on the hard drive to speed up read/write access) then moved from their to the physical RAM (128MB) on your machine.
Your CPU then requests data (instruction) from RAM (128MB) for execution. To complicate things a little further, todays CPU's ship with RAM on the CPU as well, again, to speed up or pre-fetch data.
If you want to complicate things further, and in addition to a buffer on your harddisk, we can toss in a "page file" which acts and behaves much like RAM, but resides directly on the disk.
There's more, but I think this is enough