In the late years of DDR RAM there was a company that every enthusiast knew, it was OCZ. OCZ made their brand famous with incredibly overclock-able RAM which enthusiast builders loved. The kit everyone wanted was some OCZ PC4000 VX Gold. It would routinely overclock with more voltage, and man did it look sweet in your case. Luckily we were able to pick up a pair of these golden RAM modules off of eBay with DDR500 speeds.
Sadly, Samsung and the like pushed OCZ out of the consumer RAM and SSD market in 2013 they just could not compete when the Tier1 manufactures were deeply committed to the consumer market.