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The addressable space for a 64 bit process is 8Tb. For Windows 7, the minimum RAM needed is 1Gb 64 bit OS A 64bit OS can address up to 8Tb of RAM (128 in 64 bit Vista, and 192Gb in Seven). A 32 bit OS has a lower memory requirement to run.
#Difference between photoshop 64 bit and 32 bit drivers#
Drivers for hardware usually have a 32 bit version, and there is usually not a problem with 32 bit drivers (finding or using). This means that 32 bit Photoshop can only ever access up to 2Gbs of RAM. The addressable space also applies to programs, giving a 2Gb limit of RAM to any one process. Some of this is then allocated to hardware devices, usually dropping the available RAM to 3.25Gb or 3.5 Gb. 32 bit OS A 32 bit OS can only address 4Gb of memory.
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However, for the few pure 64 bit programs out (such as 64 bit Photoshop), there can be a substantial difference. This means that there will not be a large performance increase by switching. Most software today is written and optimized for 32 bit architecture. Memory (RAM) will get what is left over, and it is this is what takes usable memory in a 32 bit system from 4Gb of RAM to around 3.25Gb. Because the address space is limited, the more hardware you have, the more space is required to address them. Each device in the system is assigned an address, which takes some of this space. Brief The big difference between 32 bit systems and 64 bit systems is the “Addressable Space”.
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The limit on 32 bit is 4Gb of RAM, whereas a 64 bit operating system (OS) can use up to 8Tb (128 in 64 bit Vista, and 192Gb in Windows 7). The most obvious difference between 32 bit and 64 bit is the amount of RAM the system can use. The Ultimate Comparison Between 32 bit and 64 bit