What aren’t you up to par with? I’m guessing video card?
If it is video card you have to look at a few things:
A) How old is your PC?
B ) Does your motherboard have PCIe or does it only have AGP?
C) If it has AGP, you may need to look at a new motherboard which may ensue you getting new RAM as well as a new processor, which basically means you just getting a new computer. Many companies are not producing AGP video cards anymore but you can still find some few and far between. You’re mainly wanting to get a PCI-Express 16 card, in which you can buy something as simple as the 8800GTS for ~$300. If your motherboard has PCIe then I suggest the 8800GTS 
.