First up, buyers of its new 4-core or 6-core Power S814 models (pictured) have the option of choosing IBM i Express Editions. Similar to the old model 720 Express Editions, these work out cheaper but have some restrictions.
Secondly, the maximum memory of the new Power S824 server has been doubled with the addition of a big 128 GB DDR3 1.6 GHz memory DIMM. Like the existing 16 GB, 32 GB, and 64 GB memory DIMMs, it incorporates L4 cache.
There’s also been a change to how Power E870 and E880 models can be configured if a user is booting from a disk or solid-state drive (SSD) that is not on a SAN. Buyers can now specify that they will be using an existing I/O drawer for their boot drive which avoids them getting automatically charged for a new one when upgrading.
There are also new ways that buyers can specify how they want new hardware to fit their rack configurations.
You can read the full details in this IBM announcement letter.