Unfortunately for databases under a heavy load it's out of the question.
You can have a server pegged at 100% CPU waiting on disk with spinning disks, and without changing anything else on the server RAM or CPU, and just replacing the drives with SSD you can quickly see that load drop down to 10%.
You can have a server pegged at 100% CPU waiting on disk with spinning disks, and without changing anything else on the server RAM or CPU, and just replacing the drives with SSD you can quickly see that load drop down to 10%.