Enable More Than 4. GB RAM In Windows Vista and 7 3. Bit. This article is written for 3. Unless explicitly mentioned, Windows 7 and Vista refers to the 3. Operating Systems. Couple of months back, I had blogged about a peculiar Windows 7 issue which could cause a BSOD Blue Screen of Death if the system had 4. GB or more RAM. I managed to find a fix for that issue. But, I had another minor niggle to figure out. Although I paid for 4. SiZPjsuD_Mg/VKG2xkSEimI/AAAAAAAAGPc/1-v078Lk4AI/s1600/upgrade-RAM-size.jpg' alt='2Gb Ram Installed Only 1Gb Usable Ram' title='2Gb Ram Installed Only 1Gb Usable Ram' />GB of RAM, Windows refused to use more than 3. GB. If you have 4. GB or more RAM then you are probably familiar with the following screen. Computer Properties displayed installed memory as 4. GB but at the same time stated that only 3 GB is usable. Gb Ram Installed Only 1Gb Usable Ram' title='2Gb Ram Installed Only 1Gb Usable Ram' />FAQ Video Streaming. Why am I only seeing short video clips, not the full video You must be logged in as a member to watch full videos or movies. Can you believe its been over four years since the original Raspberry Pi model B was released Back then the Pi Model B shipped with only 256MB of RAM and a 700MHz. Computer Properties displayed installed memory as 4GB but at the same time stated that only 3 GB is usable. So, where did the remaining memory go After pulling a USB stick out during boot of a PC, before Windoze had started, I found it was no longer readable. OK, no biggie, only noncritical data was lost. So, where did the remaining memory go As it turns out, chunks of your RAM are reserved for various purposes and are not available to the operating system. For example, PCI Express support will reserve 2. MB depending upon the graphics adapter. Due to this Windows always displays less than 4 GB RAM as the amount of usable memory. Depending upon your hardware, anywhere between 2. GB and 3. 5 GB of RAM will be available to the OS. Gb Ram Installed Only 1Gb Usable Ram' title='2Gb Ram Installed Only 1Gb Usable Ram' />Very Happy with the DS216II. Its a Two bay model for my use case plenty has I only needed RAID1 Mirror. I am using it to Back up my Mac via both Time machine Back. I am running Windows 32 bits in a 4GB RAM system. I followed the instructions and everything went fine apparently. I have now a R Drive with 1GB. I would like the specs too there are some on the aldi catalogue for the sale that starts 13 july. These are a one off sale item. I would like to know the Ram. But, what if you have more than 4 GB RAM Even on a system with 3. GB RAM, 3. 2 bit editions of Windows will display less than 4 GB of memory. This is a known limitation of the Windows Vista and 7 x. Microsoft claims that it is not their fault and is instead a limitation of the 3. At first glance this seems correct. GB of RAM 2. 32 4. G. However, this is not actually true. The main reason being a feature called Physical Address Extension PAE. PAE makes it possible to address more than 4 GB of memory using 3. Instead, the registers store linear addresses, which are mapped to physical addresses using the page table. This feature has been available since the days of Intel Pentium Pro. In x. 86 processors additional address lines are provided so that up to 6. GB can be addressed when using the PAE mode. If you want to learn more about Windows memory addressing, go through Geoff Chappells notes. Windows Vista and 7 have two kernels one which doesnt use PAE and one which does. They are NTOSKRNL. EXE and NTKRNLPA. EXE respectively. Both of them reside within the WindowsSystem. Can you guess which one you are using If you have a modern machine, then chances are that Data Execution Prevention DEP is enabled in your system and in that case you are already using the kernel with PAE enabled. How to Enable More Than 4 GB Memory. Before getting started, keep in mind that this patch involves modifying the kernel. Do no proceed unless you are confident. Most security products will identify these patches as malicious since they modify the Windows kernel. Download the appropriate patch for your system links at the end of this post. I havent tried the Windows Vista patch, but I can confirm that the Windows 7 patch works. The Windows 7 patch is in Russian language. To begin patching click on the big button refer to screenshot. After this a command prompt window should appear. Press Y. On restarting the system, you should see two entries in the Windows Boot Menu one being the older configuration and the other being the one with support for more than 4 GB RAM. If you dont want to be prompted every time, press Win R, type msconfig and hit Enter. Under the Boot tab, reduce the timeout value to something like 3 sec. If you wish, you can simply get rid of the older configuration by deleting it. But I wouldnt recommend this. If you get a water mark Test Mode on your desktop after restarting, type mcbuilder. Start Menu and press Enter. Microsoft Office Enterprise 2007 Msdn Login. Windows Vista Patch. Windows 7 Patch Step 1 Click on the buttonWindows 7 Patch Step 2 Press YThis patch will allow the OS to use more than 4 GB of memory. However, it does have a limitation more than 3 GB of memory cannot be allocated to a single application. This patch is mainly targeted at systems with more than 4 GB of RAM. However, in some cases installing this patch on 4 GB systems will also lead to an increase in available memory which may not necessarily result in performance improvement. This may appear to be a bit strange since Windows 7 and Vista are technically capable of addressing up to 4 GB of memory. Obviously, there is a logical explanation for this behavior. But, I wont discuss it here. Refer to Geoff Chappells notes on Physical Memory Map if you wish to explore the issue in detail. Warning The patches described in this article are kernel patches. They may result in unexpected hardware issues and expose your system to malicious exploits. Download Links 4. GB Memory Patch for Vista 3. SP1 and SP24. GB Memory Patch for Windows 7 3. Image Courtesey Brajeshwar. Prototype 1 Game Free Download Full Version For Pc. Hello can this game work for my pc windows 1. OS Build 1. 50. 63. Product ID 0. 03. AAOEMProcesser IntelR CeleronR CPU N3. GHz 1. 6. 0GHz. Installed RAM 2. GB 1. 8. 4 GB usableSystem type 3. I really wanna play this game thanks.