Asrock motherboard RMA procedure different from the Big Three
Long story short, I emailed Asrock informing them the problem so that they could fix it in their next bios update (had similar problem with an Asus board before) but they send me a RMA form instead without acknowledge the problem. Now there is a big difference from Asus, MSI and Gigabyte.
For MSI, Asus and Gigabyte, if you do not have the original receipt, the warranty period will be depends on the serial number (ie manufacturing date).
For Asrock, you need a copy of the original receipt and it states that without one, the motherboard will be treated as out of warranty item and they will charge US$50 flat fee to rma it, here is the note from Asrock:
-All RMA requested products with any physical damage, bent pins, purchased as open box, or without a valid invoice/receipt is treated as out of warranty. RMA out of warranty products, ASRock will charge $50 Labor & Service fee*/each and provide 3 months warranty for the above replacement product.
* Non-US customers need to indicate the check or money order to be paid in U.S dollars.
Hope this help others when deciding which brand of motherboard to get.