Hey so I have a Minecraft server for me and my friends, its just a survival world with 1-4 plugins and has about 20 people on it. The dedicated server is using spigot and windows 7 on an old dell compaq. The server is super laggy and shuts down a lot. It has 4 gigs of ddr3 ram, an intel 2120 two core processor, and an old hardrive. What is the component that would be the cheapest to upgrade with the most increase in server performance? More ram, faster cpu, or an ssd?