P8h77-v unable to boot with 3 or 4 RAM memory sitcks

I just bought a new motherboard and I've been unable to boot with RAM memory into the dimm A-1 and A-2 slot. Everything works perfectly with the dimm B-1 and B-2, but when there's a RAM memory into the A-1 or A-2 the memok! light stays on. I did modify the timing and the voltage to match the RAM, and it doesn't change anything. All four memory sticks are the same brand / spec.

Here's some of my build:

Kingston HyperX KHX1600C9D3K2/8GX 8GB 2X4GB DDR3-1600 XMP Dual Channel Memory Kit

Intel Core i7 2700K Quad Core Unlocked Hyperthreading Processor LGA1155 3.5GHZ Sandy Bridge 8MB

Corsair Professional HX750W 750W ATX 12V 62A 24PIN ATX Modular Power Supply Active PFC 140MM Fan

ASUS P8H77-V LGA1155 H77 DDR3 CrossFireX SLI 2PCI-E16 2PCI-E1 3PCI SATA3 USB3.0 Motherboard
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  1. see if your slots are all the same voltage.
    if yes then check in the manual that came with your mobo and see if any slots are different to any of the others.
  2. ^ @tomemmerson yes they have to all be the same V as this is only a DD3 board.

    @ vincenz0
    I would suspect the motherboard might be defective if you're struggling with anything in DIMM bank A. I would try one module alone in either of those sockets, if you haven't already. (I would try 2 different modules, 1 at a time, in each of those sockets, one at a time)

    Also, try clearing CMOS just so everything goes at default settings. Lastly, you can try to force the RAM to go slow (1333/1066), just as a troubleshooting measure.

    If all that still results in the memOK light being on when modules are in DIMM bank A, then I'd RMA the board.
  3. Did you fix this or was it an RMA?
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