I've gone through a few pages of this thread so far and there are a lot of nice photos in here. I'll start out with some tech photos and post some different stuff at a latter date, I posted these and some more in the Sexy Hardware Clubhouse thread. Definitely some of my favorite photos I have ever taken.
An old Intel Celeron 500 CPU, placed the CPU on a mirror with a blue sheet in the background, lit camera left at about the same height as the processor.
Seagate Barracuda HDD. Opened up the HDD and set it on my desk, I set my computers wallpaper to the binary. Had to rotate the wallpaper 180 degrees and flip it from right to left to get the numbers to read correctly. The only light is from my monitor and I used a tripod to get the best composition that I could.