My first analysis of Speccy tells me you have two sticks of PNY ram
Manufacturer: PNY Electronics
Max Bandwidth: PC3-10700 (667 MHz
)Part Number: 64C0MHHHJ-HS
I have checked that is NON ECC. ram
Therefore the setting you changed in the BIOS from ECC disabled to enabled needs to be returned to DISABLED.
I do NOT know now at what stage you are at, what I wanted you to do was to, first change that setting back and then in BIOS at the same time tell me if your ram is set AUTO default or if you have individually configured ram, or if you have NOT if it is set on other than the defaults
This is explained in your motherboard manual
If you have it please refer to it.
If you do not have please download it from here. It will prove very useful to you, not only now but in the event of future problems.
http://www.asus.com/...M3/M4A78TE/#MSLYOU need now to refer to the manual if you have any dounts, I have just downloaded it and read the relevant sections
startinng 3.3.
ENSURE PLEASE ram settings are on AUTO and ensure TWEAKER screen in BIOS is AUTO
If not so set please and save and exit.
NOTE the ram slots on that board are coloured ORANGE and BLACK - two of each.

SO slots going from processor are A1 and B1 - orange coloured
A2 and B2 Black coloured.
WHERE please do you have the ram inserted.
YOU have four slots. You have two slots occupied SLOT one and SLOT two, please check those are the orange slots.
Place the ram in the orange slots if that is NOT where they are now.
DOES it crash - no need to run memtest at this time.
IF it does crash - take one stick of ram OUT of the orange slot and place it in the black slot
SO YOU THEN HAVE ONE STICK IN A1 - orangeYou have one stick in A2 - black
You will still be running 8Gb ram, but you will the be running single channel
That is because the two orange slots are ONE stick IN EACH channel, as are the two black.
DOES it now crash.
I presume you are familiar with removing and inserting ram, take anti-static precautions please, do NOT touch the chips on the ram, hold by the edges, release the clips at each end, ensure the notch is correctly positioned, for the slot, check the clips are still outwards and insert in the notch and gently push down along the top edge until the clips locate.PLEASE DO NOT DO ANYTHING ELSE - until I come back to you.
I am NOT now working tonight, I am a commercial skipper - part time and the job I had has been cancelled due to mechanical problems on the ship that we were going out to as Pilot vessel
THAT is enough for NOW please post back with the results
Thanks