If the POST test is cycled 1-5 times over and over either the jumper for this function is set to burn=in or the circuitry involved has failed BIOS checks for any extended information of the chipset and stores it in the extended RAM area.
Further failure indicates either the chipset or the CMOS RAMMemory up to 640K is addressed in 64K blocks.
Failure is normally due to an address line or DMA chip.
But check if the 8Pin 12V plug and the 24Pin ATX PSU power plugs are plugged in properly, make sure they dont bend too much or haven a lose cable. If nothing helps, power off the mainboard, switch the vbat discharge jumper on the bottom left of the board to disconnect the battery and wait a few minutes, then set it back to default and power the mainboard on again.
The default position for this jumper is 1-2, meaning the jumper should cover the left and middle pin.
When it was introduced, Serial ATA was a quantum leap over the parallel IDE architecture.