The 3300 is built for single-socket servers and is mostly for web hosting and small- and medium-sized businesses. The 4300 is aimed at dual-socket servers, which is the largest part of the server market, and is aimed at big business, cloud and web hosting.
AMD has slotted these chips to work with the recently announced Opteron 6300 series and are based on the Piledriver architecture.
All use Globalfoundries' 32nm high-k/metal gate process.
The 3300 will come in both four- and eight-core versions, with a base frequency up to 2.8GHz and a turbo speed of up to 3.8GHz, and supports up to 32GB of memory with two memory channels. It has a single HyperTransport (HT3) link at up to 5.2GT/s. The company is touting its power efficiency, saying it consumes as little as 25W TDP.
The 4300 comes in different flavours with four, six, or eight cores per socket. It has a base frequency of up to 3.4GHz and turbo up to 3.8GHz. This supports up to 192GB of memory per processor, with two HT3 links at up to 6.4GT/s per link.
AMD wants the chips to be socket compatible with the Opteron 4200 and 3200, which are the previous generation. Supermicro has signed up to sell systems based on the new chip, while Dell and others are expected to join in soon.
Salespeople will probably try to pitch the chip on cost-effectiveness in virtual environments, saying the cost per VM should be notably lower than Intel.
According to AMD's recent roadmap these chips will be a mainstay of its sales for a while. The company has said that it will not be releasign a new set of server chips for both dual- and quad-core servers and for "low-power" until 2014.
The next server chips will be based on another revision of the architecture, known as "Steamroller."