The lucky guys from Firingsquad had the chance to visit NVIDIA's offices in Santa Clara:
We were essentially given unfiltered access to see and talk with the people at NVIDIA. The engineers did not have to turn off their monitors when we walked into their labs. We were simply asked to black out any parts of the image that could reveal confidential information.
NVIDIA’s Santa Clara campus is actually the third building the NVIDIA employees have called home. They started just down the street from the original Fry’s Electronics in Sunnyvale, before moving to Apple’s old facilities in Santa Clara. These offices had the capability to support about 500 employees or so. They finally moved to their current offices in 2001. They’ve spent the last six years there, growing from GeForce 4 to today’s GeForce 8 series.