Here's the specs for the machine I purchased from ascendtech.us for only $267 (shipped). Note: prices may vary as they change their specials. Here's a link to a system that is similar to the one I purchased.
Intel Dual Core E2180 2.0ghz 800FSB
MSI LGA775 Quad Core Ready Motherboard
Standard Cooling Fan & Heatsink Combo
2GB DDR2 PC2 6400 800mhz RAM (2x1GB Chips)
160GB SATA 7200rpm Internal Hard Drive
Onboard Nvidia Geforce7100 Video Card Adapter
Onboard 7. 1 Audio
Onboard 10/100/1000mbps Gigabit Ethernet
Beige ATX Midtower Case W/ Power Supply
Then pop in a PNY Verto NVIDIA 9400GT PCIE video adapter from tigerdirect.com for just $51.98 (checking back at the site - there's a a $20 rebate available as of 09-09-09).
Here's a shot of the video bios when starting the computer.
Here's a shot of the system BIOS, 2GB RAM and CPU specs shown.
Booting up to Ubuntu Jaunty 9.04 GNU/Linux. Note: In order for Ubuntu to install correctly, I had to set the "ACPI Aware OS" to "NO" in the BIOS. Note: I've since upgraded the OS to Ubuntu Karmic Koala 9.10 (Beta) - this is a great new Operating System... I can't wait until it's officially released at the end of October.
$184.99 Complete System
$51.98 PNY Verto NVIDIA 9400GT Video card
Drop in a nice monitor (in my case a Dell 19" LCD), kybd, mouse, and speakers and you have yourself a rockin' GNU/Linux gaming machine.
Here's the first of several videos I'll be uploading. The game is called Cold War, and it's available from linuxgamepublishing.com (LGP) for about $35(USD). This is an Awesome FPS commercial game with lots of action! Game installs natively on Linux and works great on this machine.
Fallout 3 by Bethesda Softworks, running in WINE on Ubuntu GNU/Linux 9.10. We installed the game using the PlayOnLinux tool, from here. While very gory, this game is a great FPS(FPF) in the Man vs. Mutant role. Awesome.. This video doesn't really do the game justice.. it's just a basic gameplay proof-of-concept type of video.
And another short video of Fallout 3
More to come...
So far, this new gaming machine has the same capabilities as my Dell Inspiron 530n with Ubuntu Preloaded.