Also, I am seeing best way to test RAM is to text one stick at a time via Memtest but this can take forever I am thinking because since there are 4 slots, I would need to text each of the 4 sticks in each slot to rule out a bad slot so is there a shorter but accurate way?
Unfortunately no and memtest should be allowed to run for at least 5/6 passes, see canned info below;
How to physically test your RAM with or without also running Memtest 86, this may take some time to complete but is a more accurate test than running any software while all memory is in the board.
The following checks require the computer case to be opened so take the following safety precautions 1st, disconnect any attached hardware such as the keyboard and printer etc, disconnect the power cord from the wall socket, press the case power button for 10 seconds or so to get rid of any residual charge in the system, remove the side of the case, be sure to 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, in this instance check each stick in slot one and then leave a stick in slot one while the sticks are tested in the other slots, be sure to replace the stick in slot one with another so that can also be tested in the other slots.