I can only assume it is because I cleaned the RAM slot and reseated them. I will post again in a couple of days,if everything is allright, or earlier, if I get another freeze or BSOD.
24GB RAM is the max for your motherboard.
Be sure to get 1.50v RAM.
Use the RAM finder from the manufacturers site to find the correct model number and see what you have locally.
For example: Mushkin Configurator GA-EX58-UD5 Motherboard