A closer look
Each module has a sticker on it, which gives the rated speed and the stock timings. Timings of 2-2-2-5 are pretty much the best you can get. Most motherboards do not have options going lower than these timings, anyway.
OCZ has done a great job with the heatspreaders, not only do they look gorgeous they also lower your memory temperature considerably and so increase the overclocking potential. Catching their beauty on photos is quite hard, I really like how you can see the memory chips shine through the XTC's mesh.
I assume between heatspreader and memory chips is a thin thermal tape which keeps the heatspreaders in place, but is so thin (read: good heat transfer) that it is translucent.
The PCB is made by Brainpower, known for being one of the best memory PCB manufacturers.