This particular Crucial kit model number is CT3KIT25664BA1339 and contains three individually packaged memory modules with part numbers of CT25664BA1339. These modules do not include heatspreaders. If you like the flashy looking memory, check out Crucial's "Ballistix" line.

Crucial has made it easy to identify the memory modules. If you navigate to the Micron website, you can actually trace down the memory chips and pull up a complete spec sheet. Heatspreaders are nice, but it can be tough to identify the memory to see if it's genuine. It this case, the memory modules contain genuine Micron Technology chips.