The label says that these modules are ECC regulated. This is also confirmed by the number of memory chips per side, which is 9 on these modules (Non-ECC modules have 8 chips per side). They will not work for just any desktop and are more commonly used for servers. Your desktop computer must support ECC ram for these to work.
What a bunch of bullsh** cligg. Just cause it says its ECC regulated doesn't mean anything. As long as your pc can handle 2GB worth of DDR Ram it will work.