DDR4 has been slow on the up-take thanks in part to the high price of Intel's i7 CPUs, the X99 chipset and of course DDR4 itself. Nevertheless, DDR4 remains at the for front of PC memory technology and thus is the stalwart flagship of memory manufacturers. With DDR3 we saw huge heatspreaders but the popularity of such memory kits waned when it became problematic to fit the large CPU air coolers required to keep Intel's CPUs cool. DDR4 then has seen a shift away from oversized heatsinks to low profile variants. Crucial, ever at the cutting edge of digital trends have also adopted the lower profile heatsinks to continue being one of the most popular brands of PC memory.