free games that do hog graphics?

System Manufacturer/Model Number: HP Pavilion p6795a
OS: windows 7 64 bit
CPU: intel core i5 3.30GHz Quad Core
Motherboard: HP
Memory: 6gb
Graphics Card: AMD RADEON HD 6450 1GB Dedicated
Sound Card: ATI HIGH DEFINITION SOUND
Monitor(s) Displays: LG
Screen Resolution: 16:9 Hd
Keyboard: Wireless
Mouse: HP wireless keyboard and mouse
Cooling: Fan
Hard Drives: 1TB
Internet Speed: fast enough
Other Info: Beast Of A Machine!

System Manufacturer/Model Number: built up
OS: windows 7
CPU: Phenom II AMD Dragon 3.5Ghz
Memory: DDR3 4GB
Graphics Card: ATI Radeon 512Mb
Monitor(s) Displays: HP L1506
Screen Resolution: 1152 x 864
Keyboard: HP wireless keyboard
Mouse: HP Optic
Hard Drives: WDC 1 TB SATA-II Green Power
Internet Speed: 1GB

OS: Windows 7 Enterprise 64-bit
CPU: AMD Phenom II X4 3.0GHz
Motherboard: ASUS M5A97
Memory: 8GB G-Skill Ripjaws DDR3 1333
Graphics Card: PNY GeForce 460 GTX 1GB OC - Enthusiast Edition
Sound Card: VIA High Definition Audio
Monitor(s) Displays: Dell 19"
Screen Resolution: 1280x1024
Keyboard: Microsoft Wireless Keyboard 2000
Mouse: Microsoft Wireless Mouse 2000
PSU: OCZ Fata1ty 700W Modular PSU
Case: ASUS
Hard Drives: 1TB - Primary 160GB - Secondary 250GB - External backup for important files
Internet Speed: 3 Mbps/768 kbps

System Manufacturer/Model Number: self built
OS: Windows 7 Professional 64
CPU: i7 860
Motherboard: ASUS P7P55D-E Pro /onboard SATA 6Gb/s USB 3.0
Memory: 8GB Corsair CMX4GX3M2A1600C9 DDR3 1600
Graphics Card: (2) Nvidia EVGA GTX 470 SLI
Sound Card: Onboard VIA VT1828S 8 channels
Monitor(s) Displays: ASUS VW266H 25.5" HDMI Widescreen LCD and HP vs19 LCD 19"
Screen Resolution: 1920 x 1200 : 1280 X 1024 dual
Keyboard: Saitek
Mouse: Microsoft Optical comfort mouse 3000
PSU: COOLER MASTER Silent Pro 1000W
Case: LIAN LI Lancool PC-K62
Cooling: Prolimatech Megahalems with Scythe "ULTRA KAZE" 120
Hard Drives: Intel X25-M 80GB SSD (boot) Seagate Barracuda 80GB Western Digital Caviar Black 500GB Asus DRW-24B1ST/BLK/B/AS
Internet Speed: Comcast Ultra tier 30/5

OS: Windows 7 Ultimate x64
CPU: Core i7 960
Motherboard: ASUS P6TD Deluxe
Memory: Corsair XMS3 DDR3-1600 - 12 GB
Graphics Card: eVGA GTX 275 1792 MB
Sound Card: Onboard HD etc
Monitor(s) Displays: Dell SP2208WFP
Keyboard: MS Natural (you know, like the ones you find in nature...)
Mouse: MS Intellimouse Explorer
PSU: BFG EX-1200
Case: CoolerMaster HAF 922
Cooling: Thermalright Ultra 120 Extreme with Noctua NH-12 Fan
Hard Drives: Western Digital Caviar Black 1 TB x 2 (RAID-1)

System Manufacturer/Model Number: The Cloud Windfoot Omega Build. Codename: Outpost
OS: Windows 7 Pro 64bit
CPU: Amd 550BE unlocked to Quadcore 3.1GHZ
Motherboard: GA-770TA-UD3 Rev 1.0
Memory: 4GB OCZ platinum 1333
Graphics Card: ATI 3850 512MB Asus
Sound Card: creative Xfi music
Monitor(s) Displays: samsung syncmaster T220+ Dell P780
Screen Resolution: 1680x1050, 1280x960
Keyboard: Microsoft natural ergonomic 4000
Mouse: Logitech G9
PSU: Ultra 500 watt
Case: some random case
Cooling: Coolmaster TX3
Hard Drives: WD 250GB segate 500GB
Internet Speed: Teksavvy 5Mbps down 700Kbps up
Other Info: there is a 80mm(8cm) intake fan on the side of the case and a 120mm(12cm) fan as exaust