How much RAM can a 64-bit processor support?
A 64-bit register can theoretically reference 18,446,744,073,709,551,616 bytes, or 17,179,869,184 GB (16 exabytes) of memory. This is several million times more than an average workstation would need to access.
What is addressable memory of microprocessor?
Byte addressable memory refers to architectures where data can be accessed and addressed in units that are narrower than the bus. An eight-bit processor like the Intel 8008 addresses eight bits, but as this is the full width of the bus, this is regarded as word-addressable.
What is 64bit 64-bit processor?
A 64-bit processor is a microprocessor with a word size of 64 bits, a requirement for memory and data intensive applications such as computer-aided design (CAD) applications, database management systems, technical and scientific applications, and high-performance servers.
What is bit addressable memory?
Bit-addressable objects are objects that may be addressed as words or as bits. Only data objects that occupy the bit-addressable area of the 8051 internal memory fall into this category. The Cx51 Compiler places variables declared with the bdata memory type into the bit-addressable area.
What is a 32 bit address?
A 32-bit address is the address of a single byte. Thirty-two wires of the bus contain an address (there are many more bus wires for timing and control). Sometimes people talk about addresses like 0x2000, which looks like a pattern of just 16 bits. But this is just an abbreviation for the full 32-bit address.
Which RAM is more expensive?
Most Expensive Computer RAM
|Computer RAM||Price||Available From|
|Corsair Vengeance 8 GB DDR4 PC RAM (2400 MHz)||₹7,109||Jun, 2019|
|Corsair Vengeance LPX 8 GB DDR4 Desktop RAM (2400 MHz)||₹5,750||Aug, 2019|
|ADATA PREMIER ADDS1600W8G11 8 GB DDR3 Laptop Ram||₹5,700||Feb, 2019|
|Kingston HYPER X 8 GB DDR4 Laptop Ram||₹5,499||Feb, 2019|
Why is memory not bit addressable?
The reason why the hardware isn’t bit addressable is the cost and complexity to address to that level of granularity isn’t justified. You need more wires the more accurately you address. A lot of computers aren’t really byte addressable either. They tend to move memory around in bigger chunks, 64 bytes is common.
What does it mean to have 64 bit address?
64-bit address means for me that this address can have one of 2 64 possible values and not that it can process 2 64 at a time. It’s not clear where you found this claim so it’s hard to tell exactly what it’s supposed to mean.
How can a 64-bit processor address 2 ^ 64 different memory locations at a time?
On google they just explain that a 64-bit address can represent 2 64 different values and thus it equates to the processor being able to process 2 64 values (or memory locations) at a single time, though I am interested in as much detail as possible regarding how exactly that looks like.
Can a 64 bit processor support 64 bit memory?
So, no: a 64-bit machine does not really support up to 64 bits of physical addressing, but most typical 64-bit software should remain compatible with a future processor that did support directly addressing that much RAM.
Why do x86 64 systems have only a 48 bit virtual address space?
My expectation was that if it’s a 64-bit processor, the address space should also be 2^64. So I was wondering what is the reason for this limitation? Because that’s all that’s needed. 48 bits give you an address space of 256 terabyte. That’s a lot. You’re not going to see a system which needs more than that any time soon.