If you haven't already figured out by this point, the term Flex is short for “flexible”, as in, you have options on how to cool the memory. Right out of the box, you can plug the Flex modules in and run them passively. The black heatspreaders are large enough to keep the modules cool enough under normal operation.
For those a bit more adventurous, you can integrate the memory modules into an existing water cooling loop. No extra water cooling equipment is included like clamps or tubing, so you are on your own to pick up these extras.
Although rather tall, the heatspreaders look really nice. They are solid black in color with silver accents on each end. A sticker on each module identifies it as PC3 17000 with timings of 10-10-10-30 @ 1.65v. The product number and capacity are also listed, as is the serial number. The series of fins across the top of each heatspreader helps to dissipate warm air by increasing surface area. The actual memory modules are built on a green PCB.
Let's move ahead and check out installation and the test setup.