Win7 Doesn't Detect Any Hardware

I bought Windows 7 Home 64bit OEM a few days ago to go along with a few other upgrades (more ram and a new video card). I installed everything before doing the OS install, but didn't bother optimizing/drivers etc. Anyway, after installing Windows 7 the computer booted up and whatnot, networking and internet worked etc...but Device Manager doesn't recognize any of my components.

Essentially it considers everything to be generic and I'm having a hell of a time getting the drivers installed. Should I just be downloading them from the manufacturers website and installing them? All I've been able to get installed are the mobo driver (not the audio, though).

The other drivers tend to fail during installation or, in the case of my video card, I get a black screen (though when I reset it back to the default generic VGA settings it works OK). System doesn't detect my sound card, disk drive brands, video card, DVD-RW player etc.

Here is my set-up. I'd appreciate some direction. I'm sure I'm missing something, but I'm not sure what.

Core2 Duo E6300 Dual Core Processor LGA775 Conroe 1.86GHZ 1066FSB 2MB Retail

Gigabyte GA-965P-S3 ATX LGA775 Conroe P965 DDR2 PCI-E16 3PCI-E1 3PCI SATA2 GBLAN Audio Motherboard
OCZ Gold XTC PC2-6400 2GB 2X1GB DDR2-800 CL5-5-5-12 240PIN DIMM Dual Channel Memory Kit (plus another 2gb from another manufacturer, but the same speeds)
Coolermaster CAC-T05 Centurion 5 Aluminum ATX Tower Case 5X5.25 1X3.5 4X3.5INT SILVER-BLACK No PS
OCZ GameXStream 700W ATX12V 24PIN SLI Ready Active PFC ATX Power Supply 120MM Fan Black
Arctic Cooling Freezer 7 Pro
Seagate Barracuda 7200 320GB SATA2 3GB/S 7200RPM 16MB Cache NCQ Hard Drive
1TB 7200 hard drive
Pioneer DVR-111D Black DVD-RW 16X6X16 DVD+RW 16X8X16 DL 8X IDE OEM DVD Burner
Sony Black 1.44MB 3.5IN Floppy Drive
Soudblaster sound card (can't remember which one, Xtreme somethingerather)
Sapphire HD 5770 1GB video card