2^64 equals to about 16 billion GB memory. Read this – Does The RAM size affect the speed of your PC | How much RAM you really need ? 64 bit processorĪ 64 bit processor use register of 64 bits and can handle 2^64 bits at a time to read /write or to address data. Even if graphics card of 1GB is present inside your PC then it will be minus from RAM. It also depends on the device and operating system. But in practical, 32 bit processor can access only 3.2GB of RAM and rest are useless in 32 bit processor. So, 32 bit processor can’t address more than 4GB of RAM theoretically. 2^32 equals 4294967296 bits which equal to 4GB of memory. 32 bit processorĪ 32 bit processor use register of 32 bits and can handle 2^32 bits at a time to read/write or to address data. Now, we are going to know 32-bit processor and 64-bit processor. All types of processor use parallel transmission. Parallel transmission takes minimum time because a certain amount of data can be accessed at the same time. so each bit takes individual times to be flown.
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