If you go to nvidia's website and lookup Legacy devices you'll see nforce4 chipset. Select nforce 4 SLI. I didn't see anything for 7 but you maybe able to get away with using Vista 64 drivers.
http://www.nvidia.com/object/nforce_vista64_15.23.html. I guess disreguard the supported list because I selected nforce 4 SLI from the list. Nvidia doesn't know what they support
For audio just go to
www.realtek.com.tw and download the HD audio driver for 7.
http://www.realtek.com.tw/downloads...=24&Level=4&Conn=3&DownTypeID=3&GetDown=false
Silicon driver found here,
http://www.siliconimage.com/support/searchresults.aspx?pid=28&cat=3&os=11
I guess the other LAN is a Marvell which you can grab the drivers for here,
http://extranet.marvell.com/drivers/driverDisplay.do?driverId=175
your specs:
CPU - Socket 939 for AMD Athlon 64FX / Athlon 64
- AMD64 architecture enables simultaneous 32- and 64-bit computing
- Supports AMD Cool 'n' Quiet Technology
Chipset NVIDIA nForce®4 SLI™
Front Side Bus 2000 MT/s, 1600MT/s
Memory - 4 x 184-pin DIMM Sockets support max. 4GB DDR400/DDR333/DDR266 ECC/ non-ECC un-buffered DDR SDRAM memory
- Dual Channel Memory Architecture
Expansion Slots - 2 x PCI Express x16 slot
*SLI mode : x8 , x8
*Default(Single VGA) mode : x16, x1
- 2 x PCI Express x1
- 3 x PCI
SLI - Under SLI mode : support two SLI-ready graphics cards*
- Under Default(Single VGA) mode: supports all PCI Express graphics cards
- ASUS EZ Plug
- ASUS SLI Warning LED
- ASUS EZ Selector
- ASUS two-slot thermal design
- ASUS PEG Link for dual PCIe graphic cards
Storage/ RAID nForce4 Storage:
- 4 x SATA 3Gb/s
- 2 x UltraDMA 133/100/66/33
- NVRAID : RAID0, RAID1, RAID 0+1 and JBOD span cross SATA and PATA
Silicon Image 3114R RAID controller:
- 4 x Serial ATA with RAID0, 1, 0+1, 5 (RAID 5 software patch available, no WHQL)
LAN nForce4 built-in Gbit MAC with external Marvell PHY :
- NV ActiveArmor
- NV Firewall
- AI NET2
MARVELL PCI Gbit LAN controller :
- AI NET2
Audio Realtek ALC850, 8-channel CODEC
Audio Sensing and Enumeration Technology
Coaxial/Optical S/PDIF out ports on back I/O
IEEE 1394 TI 1394 controller supports 2 x 1394 ports
USB Max. 10 USB2.0 ports
ASUS AI Proactive Features AI NOS(Non-delay Overclocking System)
AI NET2 network diagnosis before entering OS
Overclocking Features AI NOS? (Non-delay Overclocking System)
AI Overclocking (intelligent CPU frequency tuner)
ASUS PEG Link for single/dual graphics cards
Precision Tweaker:
- vDIMM: 9-step DRAM voltage control
- vCore: Adjustable CPU voltage at 0.0125 increment
- SFS (Stepless Frequency Selection): allowing FSB tuning from 200MHz up to 400MHz at 1MHz increment
- PCIe Frequency: allowing PCIe frequency from 100MHz up to 200MHz at 1MHz increment
Adjustable FSB/DDR ratio. Fixed PCIe/PCI/SATA frequencies.
ASUS PEG Link for single/dual graphics cards
ASUS C.P.R.(CPU Parameter Recall)
ASUS Special Features Post Reporter
ASUS EZFlash
ASUS CrashFree BIOS 2
ASUS Q-Fan
ASUS MyLogo2
ASUS Multilanguage BIOS
ASUS Instant Music
ASUS SLI warning LED
ASUS EZ Selector
ASUS EZ Plug
BIOS 4 Mb Flash ROM, AWARD BIOS, PnP, DMI2.0, WfM2.0, SM BIOS 2.3
Back Panel I/O Ports 1 x Optical + 1 x Coaxial S/PDIF Output
1 x PS/2 Keyboard
1 x PS/2 Mouse
1 x Parallel
2 x RJ45
1 x 1394
4 x USB 2.0/1.1
8-Channel Audio I/O
Internal I/O Connectors - 1 x SLI selector card connector
- 3 x USB 2.0 connector supports additional 6 USB 2.0 ports
- 1 x IEEE1394 connectors
- 1 x Paraller connector
- 1 x COM connector
- 1 x GAME/MIDI connector
- CPU Fan / 2x Chassis Fan/ Power Fan/ Chipset Fan connectors
- Front panel audio connector
- Chassis Intrusion connector
- CD audio-in connector
- 24-pin ATX Power connector
- 4-pin ATX 12V Power connector
Support CD Drivers
ASUS PC Probe - PC Health Monitoring Software
ASUS LiveUpdate Utility
ASUS AI Booster
ASUS Cool ' n' Quiet Utility
NVIDIA nTune Utility
Anti-virus software (OEM version)
Accessories SLI connector
1 x 1-port IEEE1394 module
1 x SLI retention bracket
8 x Serial ATA cables
1 x SATA Extension module for external devices
4 x 2-port SATA power cable
1 x 2-port USB2.0 / Game module
1 x 2-port USB2.0 module
1 x COM Port module
1 x UltraDMA 133/100/66 cable
1 x IDE cable
1 x FDD cable
1 x I/O Shield
User's manual
Setting Sticker
WinDVD Suite
Form Factor ATX Form Factor, 12"x 9.6"(30.5cm x 24.5cm)
This is an older 939 board so I don't know how well it will work with Win 7. 
