a1 and a2 ram slots not working - Memory Slot A1 and A2 not Showing club slot 888

I've built the pc but it doesn't post when the ram is in slot A1/B1, with a red cpu and orange ram debug lights on, but it does in slots A2/B2.

Hi, I got a new computer with a Asrock z97 Anniversary mobo, I put my RAM in slots A2 and B2, does it matter? Will it have any performance decreases or problems if I use these slots instead of A1 and B1. I would prefer not to move it as otherwise my CPU cooler will not fit.

need help with ram slots so i bought 2 sticks of 8gb ddr4 what channels do i put them both in A1 A2 B1 B2.