# Question & Answer: A 64-bit processor can access more memory (RAM) than a 32-bit processor. In which type of…..

A 64-bit processor can access more memory (RAM) than a 32-bit processor. In which type of applications would that be very important?

64-bit and 32-bit processor

A processor which can process ‘n’ bits of data at a time is called n-bit processor. In the case of computers everything is considered to binary that is 0 and 1. Each one (0 or 1) is called a bit. So if we have a 1-bit processor then we can have 2^1 values.

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The 32bit processor was the primary processor used in all computers until early 1990s. A 32-bit processor means it can process 32-bits of information at a time. So in short a 32 bit processor is capable of dealing with instructions and referencing memory locations of 32-bits. A 32-bit processor includes a 32-bit register, which can store 2^32 values.

2^32 = 4,294,967,295 memory locations

= 4.29 billion memory location

= 4 GB (Each memory location stores 1-byte (8 bits) of data)

This is why a 32-bit processor can access maximum of 4GB of memory. Even though we say a 32-bit processor can access 4GB of memory, in reality the actual usable memory would be 3.25GB.

Similarly a 64-bit processor is capable of dealing with instructions and referencing memory locations of 64-bits. In a 64-bit processor includes a 64-bit register, which we can store 2^64 values.

2^64 = 16 TB

64-bit processor compared to 32-bit processor

As a fact, a 64-bit processor is capable of storing more computational values which includes memory addresses than a 32-bit processor. This is because a 64-bit processor can access over 4 billion time as much memory than a 32-bit processor.

The big difference between two processors is the number of calculations they can perform per second which in turn affect the speed at which they can complete a task. A 64-bit processor can come in multiple cores. This multiple cores allows an increased number of calculations per second that can be performed, which can increase the processing power and help make computer run faster.

In general, 63-bit system can run 32-bit programs but a 32bit computer cannot run a 64-bit windows or 64-bit programs. This is because a64-bit systems are backward compatible. It detects whether an application or operating system is 16-bit or 32-bit or 64-bit an computes accordingly.

Applications

• Apple Company has already declared that iOS 11 won’t support 32 bits applications at all. In such cases developers need to ensure that the applications work with 64-bit CPU, otherwise the users won’t be able to use such apps after upgrading from iOS 10.
• Applications that has high performance demands increasingly uses 64-bit version. This is especially useful in programs that can store a lot of information for immediate access, like image editing software that opens multiple large files at the same time.
• Video games are equipped to take advantage of 64-bit processor, because of the increased memory space that comes with it. 64-bit processors are able to handle more computations at once which mean the game can be played without lagging. The graphics card will provide smoother performance as it don’t have to share memory with other processes.
• CD/CAE programs benefit a lot with 64-bit platform as it allows easy working condition with digital media without any lagging.
• Oracle Company ported their “Oracle On Demand” from 32-bit to 64-bit .This allowed reduction in server response time from 13.60 seconds to 2.35 seconds, for 350 users working simultaneously.
• FASTCOM integrated 64-bit platform based on Itanium 2 to their IT infrastructure, this helped them to eliminate issues caused by increased load on billing systems and get a better performance.
• There is an exception in te case of virus protection software. These softwares need to be system specific for better performance and security.