Also, make sure you actually installed 1.35V DDR3
L memory! Fourth-generation (
Haswell) Intel Core processors require 1.35V memory. If it's 1.5V DDR3 memory you just added, it's
out of spec for your system's processor (and may also cause any existing low-voltage memory to run at full voltage). This means your power consumption will go
way up and you may even shorten the processor's lifespan. —
bwDraco 6 mins ago