Im running an Athlon 2100+ with 768MB RAM and have NO problems playing all the first person shooters. Both online and single player. You should be able to piece one together for less than $700.
if not lots less.
I got mine from
www.viciouspc.comHere's an example. Price includes shipping.
PROCESSOR AMD Athlon XP Processor 2200+ operates at 1.80GHz, 266MHz FSB, 256K Cache
SYSTEM COLOR Jet Black
MAIN BOARD MSI KT6V-LSR VIA KT600 DDR400 8X AGP SATA RAID & 5.1 Sound
MEMORY 512MB PC-2700 DDR 333MHz Memory
HARD DRIVE 1 80GB Ultra DMA 100 7200RPM Hard Drive
HARD DRIVE 2 None.
RAID SETTING None.
VIDEO New nVidia GeForce FX 5500 128MB DDR w/8X AGP, DVI and TV Out
CD/DVD/RW 1 Internal CD Rewrittable 52X32X52
CD/DVD/RW 2 None.
RECORDING SOFTWARE None or Bundled CDRW Software w/CDRW Purchase Only
SOUND Onboard 3D Digital 5.1 Channel Sound
MODEM None.
NETWORK CARD Onboard 10/100 PCI Network Card (MSI MB Only)
FLOPPY DRIVE 1.44MB 3 1/2 Floppy Disk Drive
CASE Medium Tower AMD/Intel Certified 400W ATX Case w/Lockable Door
CASE MOD None.
CASE COOLING MediumTower Cooling system w/Dual (front and back) 80MM Case Fan
KEYBOARD Internet Multimedia Keyboard
MOUSE Optical Mouse with Hardware Scrolling Button PS/2
SPEAKERS None.
MONITOR None.
OS Microsoft Windows XP Home Edition
SERVICE Standard 3 Year Limited Parts and Labor Warranty
ZIP DRIVE None.
STORAGE MEDIA None.
SOFTWARE BUNDLE None.
ADDITIONAL SOFTWARE None.
Price: $746.00