Make Windows 7, 8 and Vista 3. Support More Than 4. GB Memory. As you’ll know, there has been 2 versions of each Windows starting from XP which are 3. Sometimes a Windows 3. We won’t go into details on what are the differences between x. Windows can support more than 4. Vista NT Kernel Patch (9898). Patch Vista’s Kernel to Address more than 4 GB of Memory. A Russian origin patch enabling 4Gb usable on Windows 7 x86. Windows with PAE Patch. Windows 7 32 bit PAE Patch. A lot of people still prefer to use 32 bit version of windows 7. GB of RAM. If your computer has 4. GB of RAM and you’re using a 3. Windows, you’ll notice that only about 3. GB – 3. 5. GB is being recognized and the remaining memory is gone. Weirdly, Windows 2. GB of memory so why can’t we do that with Vista and newer operating systems? The answer is: Microsoft doesn’t want that and it’s all just a licensing matter. THE PATCH MIGHT NOT WORK 100% ON EVERY PC! Enable more than 3GB RAM on 32-bit Win.7 (PatchPae). Windows 7 32bit 4GB or more RAM WORKING!!! 4GB Ram patch for Windows XP SP3? Why does this patch work for Windows Vista 32-bit kernel. Here are the steps: Download the PAE Windows kernel patch from Wen Jia Liu's personal webpage. Enter the Desktop tile from the Start screen and open the. Contrary to popular belief, there is no physical reason why a 3. Windows cannot access memory above 4. GB, but it’s more a case of Microsoft opting not to allow it. Read the findings of software analyst Geoff Chappell to find out more. We can of course go for a 6. Windows, but even today, there is still quite a lot of software which cannot run properly on x. Not only that, Windows 6. For example, the Ram. Patch tool over at unawave. Windows 7 RTM, but was never updated to reflect the changes to the kernel files in Service Pack 1. Also the program was removed from the website due to many false positives from antivirus software. We have tracked down the program and you can download and try it out on Windows 7 if you wish. Although some users have reported no issues running the patched kernel file from SP0 on an SP1 install, we suspect there may be stability or compatibility problems that will arise as a result of this at some point. Consider this program a useful tool to test with and perhaps not something to use permanently. Luckily, there is a method which has been kept more up to date, and although it’s not quite as easy to implement as the Ram. Patch tool above, it’s still not that difficult. Patch. Pae. 2 is by Wen Jia Liu, also known as “wj. Process Hacker task manager software. This is a small command line tool that will patch the needed system files to enable 4. GB and more of memory in Windows Vista SP2, Windows 7 RTM and SP1, and Windows 8 RTM 3. Follow the steps below to enable a patched system, the core system files ARE NOT overwritten meaning you can revert back without too much fuss. Download the Patch. Pae. 2 command line tool and extract the zip file to a folder of your choice. For our example, we’re extracting to the root of the C drive. Open a Command prompt with Administrator privileges by pressing the Win key, typing cmd into the search box and then simultaneously pressing Ctrl+Shift+Enter. Then type the following: cd C: \Windows\system. Now, Windows Vista and 7 users type: C: \Patch. Pae. 2. exe - type kernel - o ntkrnlpx. Windows 8 users type: C: \Patch. Pae. 2. exe - type kernel - o ntoskrnx. This makes a copy of and then patches the Windows kernel file to enable the extra memory of 4. GB and above. 4. Type the following to make a copy of and disable signature verification in the Windows loader file: C: \Patch. Pae. 2. exe - type loader - o winloadp. Enter this to create an entry in the Window boot menu, you can change the text in quotes to what you want: bcdedit /copy . Enter the following commands in turn, pressing enter after each. When you boot the patched system, a quick check should show that your amount of memory is now fully utilized. Do note that you still might not get access to all memory if some of it’s shared with the video adapter, e. MB onboard graphics. As you can see from the image above, we now have a 3. Windows 7 showing there is 6. GB of installed RAM available. This next image shows that Windows Resource Monitor confirms there is 6. GB of memory installed and ready to be used, with over 5. GB still available for use. If you want to uninstall this patch again from your system, simply boot into the unpatched Windows, press the Win key, type msconfig and press enter. Then select the boot tab and highlight the patched boot entry, click Delete. This screen can also be used for reducing the timeout and selecting the patched install as the default o/s to boot into if you plan on keeping it permanently. Also optionally go into C: \Windows\System. If after a Windows update you find the patch no longer works, re- run the command from step 3 to patch the kernel file again. Licensed Memory in 3. Bit Windows Vista. Geoff Chappell - Software Analyst Though machines with 4. GB are not yet the typical purchase for home or business. But there are problems. You don’t have to stand for. GB as some sort of limit. Windows as the only way to get past this limit. The amount less depends. To fully utilise 4. GB or more of memory requires. Its first two. sentences are correct for all 3. Windows Vista exactly as configured. Microsoft and installed by Dell. In the last sentence, I might quibble that the. Yet. although Dell’s statement is true, it is not the whole truth: there is something. Microsoft does not tell you, and perhaps does not tell Dell. That 3. 2- bit editions of Windows starting with Windows. Vista are limited to 4. GB is not because of any technical constraint on 3. The 3. 2- bit editions of Windows Vista and Windows 7 all contain code for. GB. Microsoft just doesn’t license you to use that. Well, to say it that way is perhaps to put words in Microsoft’s mouth, especially. Microsoft has done. Please be sure to understand that I am just telling you. Microsoft has done and. Microsoft has done it. I can’t know why. Microsoft has done it, though I will later ask why Microsoft hasn’t explained it. Microsoft says of it. The 4. GB limit is retrieved from the registry. Zw. Query. License. Value. which is itself called from an internal procedure which Microsoft’s published symbol. Mx. Memory. License. If you remove this check. GB is demonstrably not enforced. Inasmuch as the software models the thoughts of those who write. Yet I must. admit that I have not found where Microsoft says directly that 3. Windows Vista. is limited to 4. GB only by licensing. The supposed License Agreement doesn’t even. What, really, is going on? Demonstration Put aside for now the fine print of what it means to “fully utilise” and ask. Especially if you’re one of the many who believe that 3. GB of RAM, what do you expect. System Properties in the original 3. Windows Vista on a machine. GB of RAM? Click on the snapshot if you want it full- size and hi- fi: No, this image is not a mock- up, though the red rectangle is my addition to highlight. MB of RAM on this. MB. Windows will use all this memory, too, not that. I have any ordinary need for it to do so. The next picture is as much a record of. Windows Vista actually using (very nearly) all. GB. An entirely ordinary test program writes 1. GB of data from a single. That. takes a while, even on a fast machine. By the time that eight instances are running. Of course, there are contrivances and caveats. To get these pictures without. Microsoft, which Microsoft shows. The license data that would have to be upgraded is protected. I certainly do not mean for anyone. Instead, to simulate having new license data. Microsoft, I have modified the kernel just enough so that it ignores the two. I have started Windows in Test Mode so. Microsoft’s digital signature. Neither. of these steps is meant for general use. I am not solving for you the problem of. Windows Vista use all your 4. GB or more of physical memory without. Microsoft’s permission. Neither am I saying that 3. Windows Vista is a better. GB of memory. I am just demonstrating. Microsoft and many others say to the contrary, 3. Windows. Vista actually can use all the RAM that you can feasibly install. The code for doing. Microsoft sells you. There is no need to bring. Windows or to make 3. Windows Vista. believe it is anything other than 3. Windows Vista. All that needs to be changed. Microsoft permits you to use. No code needs to be changed even by one byte, but. I have to patch the code because Microsoft protects the data. I don’t know of anything. Windows finds all this memory that it ordinarily overlooks. But. I can’t swear that everything works correctly in every detail and I especially can’t answer. Windows code. With one exception, my test installation. Windows Vista Ultimate from MSDN discs, with all Windows. Windows or of devices that didn’t come with the machine. This is where my. I updated the display driver. NVIDIA). That’s as good a reminder as any that when I say 3. Windows Vista. has working code for using memory above 4. GB, I talk of what Microsoft has written. Windows, not of what you add to your Windows installation from who knows where. After all, for the page. The system memory. System Information dialog box in Windows Vista is less than. GB of RAM is installed, Microsoft states plainly that “for Windows. Vista to use all 4. GB of memory . Even if you’re perfectly happy to upgrade to 6. Windows Vista—and for all you’re to know from reading this article, I’m among you. I ask that you focus on whether Microsoft is open and truthful, and. Microsoft says about Microsoft’s products. Even if you don’t care. The more that technology companies. What is the truth, then? When someone says some such thing as that 3. Windows. Vista is technically, physically, logically, architecturally, fundamentally or otherwise. GB or more of RAM, what can they mean? There is already on the Internet and elsewhere an awful lot of rubbish to read. Hardly any of it would be worth citing even if I didn’t want. A surprising number of people who claim. GB of memory is mathematically impossible for any 3. G and a 3. 2- bit register can’t form an address above. GB. If nothing else, these experts don’t know enough history: 2 to the 1. K and yet the wealth of Microsoft is founded on a 1. KB of RAM plus other memory in. MB. Some remember this history and add seemingly plausible. GB is possible only at the price of nasty hacks that. Fortunately, Intel’s. Though. 4. GB is an obvious mathematical limit on the memory that any single 3. Physical Address Extension Old hands may already have groaned at the preceding heading. The means for a. 3. GB was built into Intel’s. Microsoft since Windows 2. If you haven’t heard of. Windows Vista, then one reason may be. Microsoft has mostly advertised it only as a feature of the server editions. Windows 2. 00. 0 Server and Windows Server 2. Enterprise and Datacenter. However, even Windows. Professional can be configured, without contrivance, to access memory above. GB by using Physical Address Extension (PAE). This is old technology. It’s also. widely and deeply misunderstood technology, arguably more than any other in the. The essence of PAE is that the 3. This is because. of very old technology called paging. From at least. as long ago as when Windows 3. Enhanced Mode established Windows as the operating. DOS, no software running on any real- world operating system gets. The 3. 2- bit. register with which a program or driver or the operating system itself addresses. The processor translates linear addresses to physical addresses by looking through. The layout of linear. Pages are typically small, just. KB each. Two neighbouring pages in linear address space can come from opposite. It’s all up to the operating system’s memory manager and. For the 8. 03. 86 in 1. PTE) was 3. 2 bits and allowed only. However, there. is nothing fundamental to that. What’s fundamental is only that every linear address. There is no reason at all. With a suitably. different translation algorithm, the physical address space can be as big as Intel. This theoretical point, which I expect was appreciated at Intel. P6 family of processors. Pentium Pro in 1. Since then, with only very few exceptions. Intel’s processors that are suitable for running 3. Windows all have enough. GB of memory and all support a translation algorithm. PAE is this alternative translation algorithm. For Windows in particular, the design is that. In 3. 2- bit Windows, a process’s. GB and 3. GB of linear address space (depending. GB is reserved for use by kernel- mode code. Both. 3. 2- bit and 6. Windows can use all of physical memory, including above 4. GB, but. each 3. 2- bit Windows application has at most 3. GB of linear address space through. The difference between that and the “fully utiltise” in Dell’s fine print seems. I don’t have any real- world applications that. GB for each running instance. Until software. that uses memory by the gigabyte becomes common for ordinary use outside of specialised. Windows—and certainly not of disturbing a working, trusted installation of. Windows. If you have a 3. Windows program that. GB or 3. GB, then upgrading to a 6. Windows is your only path ahead. If you’re buying a new computer. Windows and 6. 4- bit applications is obviously. Meanwhile, if your concern is only that the system and all. GB or more, then keeping your. Microsoft would provide. PAE support that Microsoft has already. PAE Is An Ugly Hack? Some commentators seem to have trouble grasping the naturalness of a physical. Perhaps they have been. Perhaps they have in mind the history of MS- DOS, which was kept. KB. PAE is nothing like that. It is no more a concern to any software than is paging. Just as hardly any. Except for the operating system’s memory manager. Direct Memory Access (DMA), no 3. Even kernel- mode drivers don’t need to know anything. PAE, much less be written specially to support it. All that’s required. Indeed. to write a driver that misbehaves only when memory is present above 4. GB, you actually. When working with physical memory addresses, even 3. This should be natural since Microsoft’s development kit. PHYSICAL. Moreover, this. The programmer who wanted, for who. Windows but is invalid for 3. Windows when. there’s memory above 4. GB. With only a few highly contrived exceptions, any errors. Windows. Whatever such errors may have existed years ago, the. Windows. For the particular matter of working with DMA, device drivers need to conform. DMA transfers. In particular, they need to be aware that the DMA functions may succeed. The most significant. Double buffering is a technology for when a device cannot. For instance, an old. To get data from the controller to physical memory above 1. MB. the driver must use the DMA functions properly, so that the controller actually. MB and the DMA functions then copy the data to. A less old type of device (such as an IDE controller) may be. GB. Of course, most devices can handle 3.
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