Does ATI Crossfire work on Windows 7 64bit?

System Manufacturer/Model Number: Dell Mpex
OS: Windows
CPU: QuadCore
Motherboard: Gigabit
Memory: 5GB
Graphics Card: Geforce
Sound Card: Creative
Monitor(s) Displays: Samsugn
PSU: 900 watt
Case: dell
Cooling: fan
Hard Drives: 1tb hdd

System Manufacturer/Model Number: Custom
OS: Windows 7 Professional x64
CPU: Intel i7 2600K OC'd @ 4620 MHz
Motherboard: Asus P8Z68-V Pro
Memory: 16GB GSkill Sniper 2133 Mhz (4x4GB)
Graphics Card: EVGA GeForce GTX 480 SuperClocked+
Sound Card: Realtek High Definition Audio
Monitor(s) Displays: 2x Acer S273HLbmii 27"
Screen Resolution: 2 x 1920x1080
Keyboard: Logitech MK320 (wireless)
Mouse: Logitech MK320 (wireless)
PSU: Corsair HW Series 750w (modular)
Case: Cooler Master HAF 932 Advanced Blue Edition
Cooling: CM Hyper 212+ CPU cooler, 3x 230mm + 1x 140mm case fans
Hard Drives: 64GB Crucial M4 SSD Storage: Hitachi 1TB 5400RPM, Samsung 1.5TB 5400RPM
Internet Speed: 30 Mb/s : 2 Mb/s

Computer Type: PC/Desktop
System Manufacturer/Model Number: Airbot 2.0
OS: Windows 7 Ultimate x64 SP1
CPU: Core i7 920 (D0) @ 4Ghz, *26c idle *65c full load on air
Motherboard: Asus P6X58D Premium - Sata 6Gb/s - USB 3.0
Memory: 12GB DDR3 Corsair Dominator -CMD12GX3M6A1600C8 at 1600MHz
Graphics Card: Zotac Geforce GTX 770
Sound Card: ASUS Xonar D2X
Monitor(s) Displays: 1 LG 24" Flatron W2453V-PF 1 Samsung 24" P2450H both 2ms RT
Screen Resolution: 1920x1080@60hz
Keyboard: Logitech Wireless MK700
Mouse: Logitech Wireless MK700
PSU: Corsair HX1000W
Case: Cooler Master HAF 932
Cooling: Case Fans *3 230mm, *1 140mm/CPU - *Tuniq Tower 120 Extreme
Hard Drives: 1 Samsung 250GB 840 Evo SSD 1 OCZ Vertex2 180GB SSD 1 TB Samsung Spinpoint F1 7200RPM 32MB cache 2 500GB WD Caviar Blacks 7200RPM 32MB cache (WD5001AALS) Pioneer DVD Burner DVR-S18M
Internet Speed: DL 15 Mbps UL 0.98 Mbps
Browser: Firefox Nightly
Antivirus: None
Other Info: Processor-7.7 *RAM- 7.9 *Graphics-7.9 *Gaming Graphics- 7.9 *SSD- 7.8 W.E.I final score= 7.7 *Phone- LG Nexus 5

Computer Type: PC/Desktop
System Manufacturer/Model Number: Systems by SmartEyeball
OS: 8 Pro x64
CPU: i7 3770K 4.6GHz
Motherboard: ASUS P8Z77 WS
Memory: 16GB G.Skill Trident X 2666mhz
Graphics Card: x2 EVGA 780 Ti Superclocked SLI
Sound Card: SB X-FI Surround 5.1 PRO USB / ATH-AD900 Headphones
Monitor(s) Displays: x3 Dell U2410 / 58" Samsung
Screen Resolution: 5760*1200/ 1920*1200
Keyboard: Topre Realforce // Ducky Shine MX Black // Filco Ninja TKL
Mouse: Thermaltake Theron (Highly Recommended) + Razer Imperator
PSU: Silverstone Strider Evolution 1200W
Case: Thermaltake Level 10 GT Snow Edition
Cooling: Noctua NH-D14
Hard Drives: 2x Intel 520 240GB (RAID 0) * 2x WD Caviar Blacks 2TB (RAID 0) * 2TB WD Caviar Black * Sony Optirac DVD
Browser: IE, FF, WaterFox
Antivirus: MSE
Other Info: GT Extreme V2 Sim Racing Cockpit + 40" LCD and K/B Mouse stand ▼ Fanatec CSR Elite Wheel + Clubsport V1 Pedals + CSR shifter/7G-H ▼Saitek X52 Pro ▼ TrackIR 5 Pro Buttkicker v2 Seat Rumbler with Dedicated 5.1 and Sub Woofer attached to frame ▼ = Bloody Big Grin

System Manufacturer/Model Number: Rig 1
OS: Windows 7 Ultimate x64
CPU: AMD Phenom II X4 940 Black Edition @ 3.4GHz (AM2+)
Motherboard: Gigabyte GA-MA790X-UD4P (AM2+)
Memory: Corsair CM2X4096-8500C5 (4 X 2GB)
Graphics Card: XFX Radeon HD 5770 / Diamond Radeon HD 5770 CrossFireX
Sound Card: Asus Xonar DS (PCI)
Monitor(s) Displays: Samsung SyncMaster 932bw+ (3)
Screen Resolution: 4320x900
Keyboard: Logitech Desktop Wave
Mouse: Logitech LX8 Laser
PSU: Corsair CMPSU-750TX
Case: Cooler Master HAF 932
Cooling: Corsair Hydro Series H50
Hard Drives: OCZ Vertex 2 80 GB - Windows 7 System -- WD Caviar Black 1TB - Music, Movies, Vids, Pics -- WD Caviar Black 640GB - User Profiles & Games -- WD My Book 320GB external
Internet Speed: 20 down / 2 up
Other Info: LG GGC-H20L Blu-Ray / HDDVD combo -- Hauppauge HVR-1250 -- Silverstone MFP-51 -- Logitech Webcam C600

System Manufacturer/Model Number: Eloi and his Kitchen Table
OS: Windows 7 Professional x64
CPU: Intel core 2 quad Q6600 oc@2.8ghz
Motherboard: Asrock Glan 4core-1600 (sucks)
Memory: 4GB 800mhz Kingston DDr2 (wants better..)
Graphics Card: ASUS ATI HD5770 1GB(Gddr5) OC 900Mhz + 1300Mhz (Great)
Sound Card: Creative Soundblaster Audigy SE 7.1 (Wouldn't recommend)
Monitor(s) Displays: 24inch Samsung Syncmaster P2450H (Kickass)
Screen Resolution: 1920x1080
Keyboard: Saitek 3 Eclipse <-- pretty cool..
Mouse: Logitech G500 (ex lachesis owner)
PSU: 600W, unknown make yet decent performance
Case: Unknown (Cheap thing, replacing)
Cooling: Zalman9700LED + 1 High speed 1000-3200rpm 120mm <-- Great.
Hard Drives: Hitachi 500gb 7600RPM SATAII 32mb Unknown DVD drive, its haunted. 320GB Hitachi (Philips external) 1TB Stor-e alu. 2x 500GB on Raid server downstairs. (Usually just hosts games and stuff, but its a "Guest" Pc too)
Internet Speed: 1MB/s down 100KBs up
Other Info: Server downstairs is an AMD Phenom X3 705E @ 2.8GHz with a mini ninja scythe cooler.