Why can I only use 3.25 GB of RAM usable?

The problem may also occur because the system BIOS is outdated. If you have an older computer, the system may be unable to access all the installed RAM. In this case, you have to update the system BIOS to the latest version. To update the BIOS on your computer, get in touch with your computer manufacturer.

How much RAM does Windows XP X64 support?

Although the theoretical memory limit of a 64-bit computer is about 16 exabytes (17.1 billion gigabytes), Windows XP x64 is limited to 128 GB of physical memory and 16 terabytes of virtual memory.

Why is not all RAM usable?

Why isn’t my PC using all RAM? There are several reasons for this, but most likely is that you’re using a 32-bit version of Windows. Alternatively, it might be your integrated graphics that is using some of your memory. Incompatible or improperly arranged RAM can also cause problems such as these.

Can Windows XP run 4GB RAM?

Win XP will run fine with 4 GB ram. It will run OK with 1 GB ram. There may be good reasons to not install Win XP on your computer. For instance if your hardware is recent, it might not have support in Win XP – you might have motherboard devices which don’t work because there is no XP version of the driver.

How do I fix low usable RAM?

To fix this, follow these steps:

  1. Click Start. , type msconfig in the Search programs and files box, and then click msconfig in the Programs list.
  2. In the System Configuration window, click Advanced options on the Boot tab.
  3. Click to clear the Maximum memory check box, and then click OK.
  4. Restart the computer.

Which version of XP can allocate more than 3GB of RAM?

Ordinary XP (home, pro, mce, tpce) will do you no good. XP is soledly based on 32 bit, except for the 64 bit XP. Only the 64 bit XP can allocate more than 3 gigs.

Why is my system showing only 25GB of usable memory?

First, your system only showing usable memory at 3. 25GB is perfectly correct. You cannot do anything about that unless you use 64bit windows. I suspect that the new memory you have fitted has a higher voltage rating and is therefore running at a lower clock speed.

How much memory does a 32-bit computer have?

Regardless of the Windows version, (XP, VIsta, Windows 7), a 32 bit OS can only access, (or allocate if you prefer), 4GB of total memory, with memory addresses subtracted for all the hardware attached to the system. In plain words, that leaves about 3.25 GB of usable RAM

What is the maximum amount of RAM a computer can allocate?

Everything above that will not be usable. 64 bit operating systems can allocate** up to nearly 16 exabytes of RAM, which is about 4 times the total of what humanity produced in data 2010. **Dear TechSpot:ers – correct me if I’m using the wrong word for this. IF you are using a 32 bit OS, then you cannot allocate** more than 3 gigs.