HEDT, or High End Desktop, is an acronym originally coined by Intel to refer to their high end consumer desktop PC platforms designed for enthusiasts, gamers, and content creators. Today, both Intel and AMD refer to their high end consumer desktop PC platforms as HEDT.
Some of Intel’s HEDT platforms include X79 (Sandy Bridge-E, Ivy Bridge-E), X99 (Haswell-E, Broadwell-E), and X299 (Skylake-X, Kaby Lake-X). AMD’s HEDT platforms include X399 (Threadripper).
Infinity Fabric, the successor to AMD HyperTransport, is a high speed interlink used for data exchange between the CPU, PCIe, I/O, and memory. Infinity Fabric is also used for intra-die data communications as well, linking together multiple CCX (CPU Complexes) within the AMD Ryzen, Threadripper, and Epyc CPUs.
AMD’s Infinity Fabric design consists of two distinct parts: Scalable Control Fabric (SCF) and Scalable Data Fabric (SDF). The SCF includes power management, security, and anything involving maintaining the operation of the chip while the SDF is what ties the memory and the compute components together. As such, the latency of the SDF must be low [...]
In AMD CPUs, CCX is an acronym used by AMD to refer to the Core Complex used in AMD’s Zen architecture based processors. Each CCX is a modular unit which contains four Zen cores connected to a shared L3 cache. Multiple CCX are then connected together using AMD’s Infinity Fabric interconnect to then create processors. For example, AMD’s Ryzen 7 processors contain two CCX while AMD’s EPYC 7000 processors contain four CCX.