I'm trying to intall to my hp-z420 two ddr3 4gb pc3-12800 dimm of ROM. But PC just not starting. ( Tried installing in all slots also tried schemes that writen in service manual )
DDR specs GoodRam GYG1600D364L9s/7gds
full working Ram specs ( now installed )2gb 1Rx8 PC3-12800e-11-11-D1 M391B5773DHO-CKO M1242