Yesterday I compared memory to a desk. The bigger it is, the more you can spread out and work on at once. That desk is your RAM, and it's one of the few upgrades that can make an old computer feel faster and fresher. When it's the right fix, anyway.

Every program you open covers part of the desk. A handful of browser tabs, your email, a photo editor, they all need a spot. Once the desk fills up, the computer starts shoving things back onto the much slower storage drive to make room, and that shuffling back and forth starts taking it's toll. More RAM, bigger desk, less shuffling.

So how do you know you're low? A few tells:

• Things slow down once you've got several programs or a lot of tabs going
• Switching between windows feels sticky or laggy
• It runs fine first thing in the morning and drags by afternoon
• The drive is working hard even when you're not saving anything

As for how much you need, for everyday email, web, and documents, 8 GB is the floor and 16 GB gives you real room to breathe. If you juggle a lot of tabs or do photo and video work, aim for 16 or more. Past that you're only helping yourself if you do heavy specialized work, and for most folks that extra money does more good somewhere else.

Now the honest catch, because I'd rather you not waste money. More RAM only helps if RAM is the thing holding you back. If your computer is slow because it's still running an old spinning hard drive, adding memory barely moves the needle. The drive is the bottleneck, and that's tomorrow's story. One more thing worth checking: on a lot of laptops the RAM is soldered in and can't be changed at all, so find that out before you buy anything.

Want to know if more memory would actually help your machine, or if something else is the real holdup? Book a remote session and I'll look before you spend a dime.