i am trying to buy/build a pc that can run crysis 2 and crysis 3 in the future. i have never built a pc before and im kinda a noob. could anyone give a suggestion for a pc build for $700-$1000. any information will help.

Im no expert but i just built my new PC a few weeks ago. I built it for Cryteks Warface & a few other games too. Im not sure if its in your budget but heres what i got;

ASUS M5A78L-M LX V2 AMD 760G (Socket AM3+) DDR3 PCI-Express Motherboard (no usb 3)
AMD FX4100 CPU
GeiL Black Dragon 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit
ASUS Radeon HD 6770 1024MB GDDR5 PCI-Express Graphics Card
600w PSU
Zalman Z11plus tower

I already had a monitor & a few other bits...i also got a bit of a discount which helped. Its a pretty beastly machine though. Can run Crysis 1 on full settings. It cant quite run Crysis 2 at Ultra settings but 1 player seemed to run pretty smooth on hardcoe settings. All other games ive played like Tribes Ascend & SWTOR im running at full settings.

if you ask me, you shouzld get an MSI, or Asus gamer motherboard with Realtek ( not with Beast audio, its a bs, not even close to professional ) , the best Corsair DDR3 memory ( at least 12 GB ) and AMD graphic card above 7850 series! If you asking me I'd like to suggest you the R7990! MSI and asus making the best ones today! ( Nvidia has issues with both GTX 670-680 and GTX 690 )

Coolmaster case, if its possibile with one has at least 4 fans, and USB.3.0 installed! I'll waiting for your reaction!