I have a Gigabyte GA-990FXA-UD3 v1.2 motherboard with AMD with 4 x 4 Gb DDR3 RAM.
(https://www.gigabyte.com/Motherboard/GA-990FXA-UD3-rev-12)
Under higher performance (CPU or memory intensive operations, or long disk copy operations)
the Northbridge of this board is overheated reaches 80 °C...