These boot parameters have conflicting effects. To configure DEP and PAE, use only the parameter combinations that are described in the documentation for each parameter and discussed in this topic. Do not experiment with conflicting parameters, especially on a production system. The parameter combinations for each Windows operating system are summarized in the following section. Skip to main content. This browser is no longer supported. With PAE, the operating system moves from two-level linear address translation to three-level address translation.
Instead of a linear address being split into three separate fields for indexing into memory tables, it is split into four separate fields: a 2-bit bitfield, two 9-bit bitfields, and a bit bitfield that corresponds to the page size implemented by Intel architecture 4 KB. In bit Windows running on xbased systems, PAE also enables several advanced system and processor features, including hardware-enabled Data Execution Prevention DEP , non-uniform memory access NUMA , and the ability to add memory to a system while it is running hot-add memory.
PAE does not change the amount of virtual address space available to a process. Each process running in bit Windows is still limited to a 4 GB virtual address space. If the computer does not support hardware-enabled DEP or is not configured for hot-add memory devices in memory ranges beyond 4 GB, PAE must be explicitly enabled. When neither 4GT nor AWE are being used, the amount of physical memory that a single bit process can use is limited by the size of its address space 2 GB.
In this case, a PAE-enabled system can still make use of more than 4 GB of RAM to run multiple processes at the same time or to cache file data in memory. Instead of accessing directly , it uses PAE to acts a translator to address memory location beyond the 4GB realm. Remember that bit processor can only address 4GB of memory space , this extends it to bit or sometimes up to bit. There is one — you are still limited by the law of physics and computing. Since our system is bit , therefore the instructions are still in bit and we are still bounded by bit instructions.
This is because that the instructions are in bit still. Firstly you would have more memory which means that you could run more applications on your bit system. Imagine if you want to run photoshop and lightroom concurrently , it would not be possible.
However with PAE turned on you could run these programs in main memory. You could now able to load these applications in RAM directly which should increase your productivity since program takes less time to load if they are located in memory compared to hard disk I like to get my hands dirty.
So how do I do it myself? Kindly read the guide here. In fact that site helped me to write this guide that explains the concept in plain English.
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