Recently, I bought a new memory stick to speed up my machine, which is the exact product that I have been using. The problem is either of the RAM overheats like after 5 minutes once my computer turns on. I have noticed this when I checked my memory sticks, then found out that one of them is abnormally heating up. I have also tried to switch their slots but still, one of them will cause my computer to hang. So, now I'm running it with only 1 stick, but I'm not having any trouble. Hoping that this will be solved.
There can be 2 possible reasons for the issue: - faulty new memory module - faulty power circuit of one of the memory slots.
It's simple to check: if the heated memory module is always the same whatever slot you put it to - it is an issue with RAM. If any of the RAM modules are heated in the same slot - it is an issue with the power source supplied to the memory slot.
It can't be a frequency issue because as you posted - you have two identical modules - and you can't set different frequencies for different slots. So, they are working at the same speed.
It is also wrong that BIOS is responsible for power supplying to the RAM subsystem. BIOS is capable only to gather information from sensors of what voltage is supplied from PSU. Voltage that is powering RAM slots is 1.8V and is generated by DC-DC convertor. +5V is supplied to the motherboard, is converted to 2.5V and after that to 1.8 V. This is how the voltages are obtained: http://laptoprepairegypt.com/wp-content/uploads/2012/12/02074fb6595ca5f3102a89db6a95b59a.jpg
You can check what voltage is on your RAM slots You need to put the red pin of the multimeter of the corresponding +V contact, and a black one - on the ground. Here is the picture which contacts you need to check and and what are the voltages there: http://www.rom.by/files/DDR2_pin.gif
Here is the video of the whole process: https://www.youtube.com/watch?v=FCmVGKbgS1k