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Usually no AXG voltage under low graphics charge.
CPU CORE and AXG have very low ohm value to ground as normal on this board.
Did you test one (known good) RAM module at a time, each slot by separate?
Do you have DDR3 test card?
Do NOT power up the board.
All LEDs must lit.
Some of them (8 I suppose) will be at max.
If one LED stays off, corresponding line is broken (to CPU); or bad contact on the socket.
nvm. issue gone. ultrasonic the machine its all good. touched up first line of balls. i only seen the first couple go bad... not sure what else also someone tightened the screws real hard loosened them a bit.