I just purchased a new PC from Dell (XPS 8700 with 4th Generation Intel Core i7-4790 processor (8M Cache, up to 4.0 GHz)). It comes stock with 8GB Dual Channel DDR3L 1600MHz. On my old rig, I have 32GB DDR3-1333 CL9 (Kingston Hyper X blu). My question is should I use the old rig's memory (32GB) or stick with the lower amount of Dell memory (8GB) or mix the two (24GB). From my understanding, if I mix the 2, the speed will drop down to the slower speed anyways, so I thought that it might be best to use all 4 DIMM's and go with 32GB. The computer is used at home for work with multi-tasking, gaming, un-raring/unzipping files, etc. Any insight would be appreciated. Thanks!