I have an i9 hp g4 z4 and I'm trying to install 4x16gb ram. I bought these: DDR4-3200 • CL=22 • NON-ECC • UDIMM • 288-pin • 1.2V • 2Rx8 • PC4-25600. I have 8 ram slots. I tried putting them in alternate slots, black ones, from the front but doesn't work. Tried all four in first four, doesn't...