I can hardly believe that, perhaps one of the sticks is faulty.

Just try one stick at a time and try different slots.

Do not immediately overvolt them, go slow on volts, D9 likes volts but only for short periods of time.

Just start of at 2.2-2.25V, 500 (DDR1000) 4-4-4 ought to be a walk in the park.

Did you disable DRAM static read control in bios?