IBM's latest move may have cracked the code on a cheaper DRAM alternative

A cheaper alternative to DRAM just took a step closer to enterprise data centers as IBM unveiled a way to make it more dense.PCM (phase-change memory) is one of a handful of emerging technologies that aim to be faster than flash and less expensive than DRAM. They could give enterprises and consumers faster access to data at lower cost, but there are challenges to overcome before that happens.Density is one of those, and IBM says it’s achieved a new high in that area with a version of PCM t