You can also check this http://cyri.systemrequirementslab.com/srtest/ (from user Kweenix) for a game.
If your game isn't there, read this guide.
You can download this app to view your hardware, but this shows more than you need, so you will need to hunt down what you're looking for. It is good for computer pros. (thanks to johnf888) It's still good to check it out though.
Step 1: Materials
Step 2: Checking What Your Game Needs
Step 3: Cd/Dvd Drive
Step 4: Disk Space
If you have a higher number, that is better. If you have a lower number, than you won't be able to run the game/software. This goes for Processor and Ram too.
In Windows XP, you might have to click on the button and look for it on the left side of the window. Or you might have to right click on the button and click properties.
In windows 7, it shows you how much disk space you have. Remember that gb's are bigger than mb's so if the spec says 80 mb and your computer says 8 gbs free, you have enough memory. 1024 mb is one gb.
Step 5: RAM, Processor
Since I'm running Windows 7, it might look different than Windows XP. Windows Vista should look similar.
After selecting properties, look for RAM and the number after. That is how much RAM you have.
Now look for Processor or a number with a GHz or MHz after it. This is your processor speed. (some stuff don't need this)
If you don't see Processor or Ram, try clicking some of the top tabs/buttons.
Remember that gb's are bigger than mb's GHz are greater than MHz! (ex: 5 gb > 500 mb, 5 GHz > 400 MHz)
Step 6: Video Card
On xp:(maybe vista)
- Right click anywhere on an empty space on the desktop then click properties.
- Now click on the Settings Tab and Click the Advanced button.
- Now click on the Adaptor Tab.
- you will see your video card name.
On Windows 7:(maybe vista)
Right click anywhere on an empty space on the desktop then click screen resolution.
Now click advanced.
You will see your graphics card name.
A good graphics card is a Nvidia or an ATI card. Most from intel are very bad and won't support new games. I would suggest that you look at how new and graphics heavy the game is and maybe not buy it if you have a low quality video card. You can also borrow a friends new game and see if it'll run on your computer.