WEBVTT

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a quick search on our hype evaluation machine also known as the Google reveals

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just shy of 9 million hits about 64-bit

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versus 32-bit processors uh no some of this hype was

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started by the PC crowd back when AMD launched their first desktop PC 64-bit

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CPU back in 2003 but since last Fall's

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launch of the iPhone 5S the first smartphone with a 64-bit CPU it's become

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a hot time topic again but what does it actually mean for Average Joe let's

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start with what a bit is very briefly here one bit is a single character and

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binary either one or zero so it can only

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express up to two values with two bits we can express up to four values and

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with three bits that goes up to eight every bit we add increases the number of

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different values we can represent in binary exponentially now you'll hear

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about bits in relation to all kinds of computer things from data storage to

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data transmission to data processing so that brings us back to CPUs in the

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context of a processor the number of bits generally refers to the amount of

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memory it can address so while a 32-bit processor is without pae magic tricks

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limited to about 4 gigs of memory or RAM a 64bit processor can handle up to 16

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billion gab of

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RAM all right lonus that sounds interesting more RAM is good for

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performance right bring on the bit where's my 128bit well hold on a second

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there cool your rainbows My Pony friend more RAM is only beneficial if you need

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it to store data that's applicable to the task your processor is working on at

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a given time adding more RAM to this

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isn't going to make the ball move faster so a move to more bits for processors is

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not something to be undertaken for no reason aside from the hardware

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re-engineering and instruction set architecture extension or redesign

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it involves a complete rewrite of fundamental parts of the operating

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system be it Windows OS 10 Linux Android iOS or whatever it requires specific

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driver software for all Hardware components that will be used and finally

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application developers will need to at least recompile and debug their code

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just to achieve basic compatibility without taking advantage of any

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performance improvements well okay lonus but um I really want that shiny new ooh

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64-bit processor maybe the entire hardware and software Industries will

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cooperate for a fast migration for the first time ever so I can have huge

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performance gains right anyone I

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wouldn't hold your breath here we are over 10 years after the release of the

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Athlon 64 and in addition to most of the

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applications on my 64-bit PC anyway running in 32-bit mode Microsoft is

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still supporting entirely 32-bit versions of even their latest Windows

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8.1 OS and furthermore if you think a 64-bit processor is faster then I'm

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afraid you've bought into the hype my friends for certain workloads and

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nothing you're doing on your phone at the moment there will be a benefit but

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in most cases what you're actually benefiting from is that a 64-bit CPU

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will tend to have a newer more robust design overall with more registers

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functional units memory bandwidth and all that other stuff so until we need

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more than 4 gigs of RAM for our phone applications which who knows may not

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actually be that far away the 64 bit is

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just a necessary transition being

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packaged up for the general consumer as a selling point speaking of selling

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