Foldit allows players to run multiple clients at the same time. With multiple clients, players can work on more than one puzzle at same time, or pursue different solutions to one puzzle. With many newer PCs, it's possible to run more than one foldit client at nearly full speed. This is because most microprocessors are actually multiprocessors. Current desktop systems may have 8 independent processors or CPUs (central processing units), and many laptops have 4 CPUs. These can be "logical processors" (you can have only one processor with 2 cores and still 4 logical processors or CPUs).