The part number of a memory module or chip is used to match up memory
on a PC. If the memory’s part number ends with a dash and a number, such as
“-60,” it is industry standard EDO (Extended Data Output) or FPM (Fast Page
Mode) memory. If the part number ends with a slash and a number, such as
“/32,” it is industry standard SDRAM (Synchronous DRAM). SDRAM part
numbers also indicate the standard to which they conform. For example,
a Kingston Technology memory with the part number KTM66X64/128 is
compliant with the Intel 66 MHz standard and is a 128 MB DIMM, and a
KVR-VC133/128 is a 128 MB, PC133 DIMM. Other manufacturers, such as
Viking, Micron, and others have very similar part numbering to allow memory
to be matched easily.
Immediately after new software or operating system is installed Later
versions of applications and operating systems can require more memory
than their older versions. New software, especially beta versions, can have
several bugs that produce memory errors on the PC. The way to solve these
errors, other than uninstalling or reinstalling the software, is to check for a
BIOS upgrade or a service patch for the software.
Immediately after hardware is installed or removed When new hardware
is installed incorrectly or a connector that is connected to the motherboard is
dislodged or missing, the errors that result can appear to be memory errors,
complete with memory error messages. Check the cables and connectors and,
if that is not the problem, check for newer device drivers or BIOS updates.
For no apparent reason If a PC has been running okay and suddenly begins
having memory problems, reseat the memory modules and check for corrosion
on the contacts of the memory modules and the slot connectors. If the PC is
running too hot, it may have damaged the motherboard, memory, or processor
to the point of errors. And then there is always the power supply to check.Memory Errors
The following are common instances of memory failures and errors: The POST sounds a single beep code Remember that a single beep code can
either sound an all clear or signal a memory failure. If the boot continues, the
beep was the all clear. If it stops, check the memory to ensure it is properly
installed and is configured in the BIOS properly.
The PC boots with a blank display If the PC is able to boot but the display
is blank, it means that an error may have occurred at the beginning of the
memory check. The types of conditions to look for are a dislodged expansion
card, a memory module not fully seated, or an unsupported memory module.
Confirm that all expansion cards and memory modules are seated in their
sockets and verify that the memory installed is compatible with the system
by checking its part numbers. Putting nonparity RAM in a PC that has error-(^634) PC Hardware: A Beginner’s Guide