Look, I hate to break it to you, but that's really NOT that good of a PC. Not at all man :/ HP does a mediocre job of manufacturing their PCs and the air flow in that case is horrible. The NVIDIA card is also an integrated card so no wonder the PC has such a weak card. In addition the motherboard isn't that good either. And the power supply is abmysal. 220 Watts!! You'll need at LEAST 500 watts for a pretty decent card to run Crysis 1.
My advice: Just save up some more money and build your own PC. I can probably think of a PC twice as good as this one for 400 bucks alone!

It's all about knowing PC hardware deals. I suggest you use newegg.com for buying PC components.
What I want to mainly let you know is that building a PC, ISN'T that hard :p If you need some help, google the issue you have. Youtube has PLENTY of videos on how to build a PC. The only hard part about building a PC, is organizing the wires. It's time consuming, yes, but the result is satisfying, and who knows...maybe you'll enjoy the 3-4 hours building the PC lol. If you really don't feel confident in building, find a friend who can help. But really, it's not THAT hard to built a PC, not even lol.