A closer look
Mushkin's sticker describes all required settings. On it you can find module capacity, speed, recommended timings and the default voltage. This is the complete set of information you need to install the module. Some other manufacturers list only partial specs, so you will have to look on their website before installation.
Even though the sticker looks like it is barely holding on the memory modules, it holds a surprise for you should you try to remove it. This VOID writing will appear when the sticker is peeled off, no matter how careful you are - and with it goes your warranty.
Mushkin uses the popular Micron D9GMH chips for the XP2-6400 Series.
Like most other memory manufacturers, Mushkin uses Brainpower PCBs for their memory.