As you’ll know, there has been 2 versions of each Windows starting from XPhường. which are 32-bit & 64-bit editions. Sometimes a Windows 32-bit is referred as x86 and 64-bit as x64. We won’t go inlớn details on what are the differences between x86 and x64 are, but one of the major differences is a 64-bit Windows can support more than 4GB of RAM. If your computer has 4GB of RAM và you’re using a 32-bit Windows, you’ll notice that only about 3GB – 3.5GB is being recognized & the remaining memory is gone. Weirdly, Windows 2003 & 2008 can already address more than 4 GB of memory so why can’t we bởi that with Vista and newer operating systems?


The answer is: Microsoft doesn’t want that and it’s all just a licensing matter. Contrary khổng lồ popular belief, there is no physical reason why a 32-bit Windows cannot access memory above sầu 4GB, but it’s more a case of Microsoft opting not to allow it. Read the findings of software analyst Geoff Chappell lớn find out more.

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We can of course go for a 64-bit version of Windows, but even today, there is still quite a lot of software which cannot run properly on x64, which can be inconvenient if you’re someone like us who installs & tests a lot of software. Not only that, Windows 64-bit doesn’t accept unsigned drivers unless you disable driver signature enforcement manually every time you boot. Quite frustrating… Well, here is good news for Windows 8, 7 và Vista users because we have sầu some patches here to lớn make your 32-bit Windows support more than 4GB of memory.

There have sầu been a few 4GB patchers available, but unfortunately most of them haven’t been kept up lớn date. For example, the RamPatch tool over at unawave sầ works quite well on Windows 7 RTM, but was never updated khổng lồ reflect the changes to lớn the kernel files in Service Pachồng 1. Also the program was removed from the trang web due lớn many false positives from antivirus software.


We have tracked down the program & you can download và try it out on Windows 7 if you wish. Although some users have reported no issues running the patched kernel tệp tin 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 khổng lồ chạy thử with and perhaps not something to lớn use permanently.

Luckily, there is a method which has been kept more up to date, và although it’s not quite as easy to implement as the RamPatch tool above, it’s still not that difficult. PatchPae2 is by Wen Jia Liu, also known as “wj32” who is behind the excellent Process tin tặc task manager software. This is a small comm& line tool that will patch the needed system files lớn enable 4GB và more of memory in Windows Vista SP2, Windows 7 RTM and SP1, & Windows 8 RTM 32-bit. Follow the steps below lớn enable a patched system, the core system files ARE NOT overwritten meaning you can revert back without too much fuss.

1. Download the PatchPae2 command line tool & extract the zip tệp tin to a thư mục of your choice. For our example, we’re extracting lớn the root of the C drive sầu.

2. Open a Commvà prompt with Administrator privileges by pressing the Win key, typing cmd inlớn the tìm kiếm box & then simultaneously pressing Ctrl+Shift+Enter. Then type the following:

cd C:Windowssystem32

3. Now, Windows Vista và 7 users type:

C:PatchPae2.exe pháo -type kernel -o ntkrnlpx.exe pháo ntkrnlpage authority.exe

Windows 8 users type:

C:PatchPae2.exe -type kernel -o ntoskrnx.exe cộ ntoskrnl.exe

This makes a copy of & then patches the Windows kernel tệp tin to lớn enable the extra memory of 4GB và above.

4. Type the following khổng lồ make a copy of & disable signature verification in the Windows loader file:

C:PatchPae2.exe pháo -type loader -o winloadp.exe cộ winload.exe

5. Enter this to create an entry in the Window boot menu, you can change the text in quotes khổng lồ what you want:

bcdedit /copy current /d “Windows Vista/7/8 (Patched)”


This should give you a “successfully copied to…” message with a number of BCDID characters returned in brackets, make a note of them as you will need to lớn enter them in the following commands.

6. Enter the following commands in turn, pressing enter after each. Replace BCD_ID with the ID you got from step 5:

bcdedit /set BCD_ID kernel ntkrnlpx.exe cộ (for Win 8 use ntoskrnx.exe)

bcdedit /phối BCD_ID path Windowssystem32winloadp.exe

bcdedit /set BCD_ID nointegritychecks 1

Now reboot your computer and you should get a new entry on the Windows Boot Manager to lớn run the patched operating system.


The good thing here is if you have problems, you can simply switch to the unpatched normal system by rebooting because the kernel files were copied and not overwritten. When you boot the patched system, a quiông chồng check should show that your amount of memory is now fully utilized. Do note that you still might not get access to lớn all memory if some of it’s shared with the video clip adapter, e.g. 512MB onboard graphics.


As you can see from the image above sầu, we now have sầu a 32-bit Windows 7 showing there is 6GB of installed RAM available.


This next image shows that Windows Resource Monitor confirms there is 6GB of memory installed & ready to be used, with over 5GB still available for use.

If you want lớn uninstall this patch again from your system, simply boot inlớn the unpatched Windows, press the Win key, type msconfig & press enter. Then select the boot tab và highlight the patched boot entry, click Delete. This screen can also be used for reducing the timeout & selecting the patched install as the default o/s to lớn boot into if you plan on keeping it permanently.


Also optionally go inkhổng lồ C:WindowsSystem32 & delete the ntkrnlpx.exe cộ và winloadp.exe files. If after a Windows update you find the patch no longer works, re-run the comm& from step 3 khổng lồ patch the kernel tệp tin again.

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Important Note:Do be aware that PatchPae’s developer offers no tư vấn of any kind for this tool & if it works, fine, if it doesn’t, forget about it và move on. It’s also important that you make full backups of your system prior to trying PatchPae. Even though it does not overwrite any system files, that does not stop users from being unable or unwilling to lớn follow the guide correctly, which could stop the system from booting into lớn Windows.