RAM testing steps below, this will take you some time and is best done and left running overnight or if you are out for the day.
How to physically test you’re RAM.
For thorough testing, each stick should be individually tested using Memtest86 and for a minimum of four passes, Memtest86 free download and “how to” guide here
The following checks require the computer case to be opened so take the following safety precautions first, disconnect the power cord from the wall socket, press the computer power on button for around 20 seconds to get rid of any residual charge in the system, remove the side of the case, take anti static precautions before touching anything inside, you can do this by touching a bare metal part of the case or the PSU.
Have a pencil and notepad to hand.
Remove each stick of RAM and blow out the memory slots.
Insert the first stick of RAM in memory slot one, reconnect the power and in the case of a desktop computer the video to screen cable.
Power up the computer and see how it goes.
Make a note of the results.
Repeat the procedure until the first stick of RAM has been tested in each memory slot and the results written down.
Remove the first stick of RAM and put it to one side on top of a piece of paper with the number one on it for identification purposes.
Repeat the procedure with all RAM until each stick has been tested in all slots, the results written down and the sticks identified numerically.
Please note that some MBs (motherboards) will not boot unless there is RAM in slot one so please provide us with your motherboard details, brand, model name/number and any revision number, these details may be found by the CPU, between the PCI - E slots and/or around the edge of the motherboard.