The "AMB IC FB-DIMM in Riser A Slot 1 and 2" run at 128 degrees C, because of the RAM that you installed on your system. It's reading error from iStat Menus. Try different manufacture of RAM to find a better match for your system!
Thanks guys, Actually, I bought this device in Korea and there is no official reseller or global warranty in Vietnam for it! +_+ So, I will leave this topic open and welcome all the ideas coming before I break it up! ^^