So, I guess we're up to DDR4 now—or at least, we will be very soon. Micron says it has successfully developed, sampled, and received customer feedback on its "first fully functional DDR4 DRAM module"—a 4GB part that includes eight 30-nm, 4Gb chips. Here are the dirty details:
Codeveloped by Nanya and based on Micron's 30-nanometer (nm) technology, the 4-gigabit (Gb) DDR4 x8 part is the first piece of what is expected to be the industry's most complete portfolio of DDR4-based modules, which will include RDIMMs, LRDIMMs, 3DS, SODIMMs and UDIMMs (standard and ECC). For the soldered down space, x8, x16, and x32 components will also be available, with initial speeds up to 2400 megatransfers per second (MT/s), increasing to the JEDEC-defined 3200 MT/s.
The module actually started sampling earlier this year, but Micron now boasts that it's gotten feedback from "major customers," and it says mass-production will kick off in the fourth quarter of this year. We're apparently due for the first commercial applications some time in 2013.
Speaking of those, Micron expects the "enterprise and micro-server markets" to be at the forefront of the DDR4 transition. It adds that the the "ultrathin client and tablet markets" will also benefit from the technology. If given half a chance, though, I bet us PC enthusiasts will jump on the new memory type like wild cats on fresh meat—assuming there are tangible performance and/or power-efficiency advantages, that is.
According to an iSuppli report posted last year, DDR4 won't have a significant slice of the DRAM module market until 2014. iSuppli expects DDR4 to account for a whopping 56% of that market in 2015, though.