Sales Advisor: "4GB is more on a mac.. they use different measurements.."... at that point I gave up trying to get some info out of him

Maybe he has heard of the fact that some companies write 4gb and mean 4*10^9 instead of 4*2^30 bytes. Not sure who uses what though.

@PRein that's why we now have GiB in addition to GB
GiB is a "Gibibyte", or Giga-binary-byte, which is the classical way of representing sizes
Where GB, or Gigabyte is based on the SI-units notion of "Giga".

A lot of software companies are moving over to GiB to remove any sort of confusion

I don't think it's about conversion here. It's an urban myth that a lower performance Mac can compete with a higher performance PC because hardware optimisation is really good.

@620hun yes, that's what I thought the guy was referring to. Didn't know it was a myth though.

@620hun but *nix is more efficient than windows though

I've had the opportunity of sharing the same space and time with people that don't use Mac but have the most to say about Mac. I just sit there and listen.

Oh, sh*t))))) That's funny)) But, to be honest, all the hardware on Mac's perfectly optimised. That's why, for example, mac book pro could serve you perfectly for 5, 8, 10 years! Wonderful computers.

@edisonn I figure the majority of users on here would get your "joke".

OS X has this feature called compressed memory, which as the name says compresses data before storing it in memory. Depending on the amount of memory required, it adjusts the compression level. Higher compression means more processing to decompress. In it's Activity Monitor, the memory tab mentions Memory Pressure instead of memory usage.

@Oversmart Windows 10 also recently moved to compressed memory.