I would think it should be in the DIMM1 slot. Somewhere I saw that the memory is usually in the slot closest to the processor and/or in the lowest number slot. But when I opened the computer the current 8GB stick (there was only 1) was in the furthest black slot away from the chip. I know enough to put them in the matching color slots for dual band. What is confusing me is I have a matching pair of 8GB sticks to install. And even the HP memory upgrade with videos page: was of no help as far as placement of memory. Here is the motherboard: ms-7778 JasmineR but those instructions do not help with placement of memory and a Google search did not yield results. So I went out an bought the appropriate memory according to the stats here:
After another post in this forum it was decided that I could benefit from 16GB (8GB x 2 Matching) as I am a webmaster with many large adobe and other programs open at once. I have a new HP Pavilion 500-017c computer with 8Gb of memory.