I'm trying to figure out which CPU configuration would give me the best performance and an HP server. All else being equal, would two 4 core 2.5 GHz processor be better than one 8 core 2.5 GHz processor in terms of overall performance? I am running six virtual machines using ESXI on this physical server host including two database servers doing lightweight database crunching. Thanks.
The memory on the HP DL servers is balanced accordingly to CPU so you will only be limited in the number of memory you can place in the server. If you reach a certain limit you would not only need to buy memory but the CPU kit as well which will cost you more in the long run as it may no longer be available readily
If only one processor is installed, only 12 DIMM slots are available. Memory is usually the chokepoint and is cheap, get the 2 CPUs now and you don't have to worry later