The low-end Ryzen 3 part disables simultaneous multithreading and has 8 Vega cores the Ryzen 5 part retains the multithreading, has 11 Vega cores, and slightly higher clockspeeds. Both the AMD Ryzen 3 2200G and AMD Ryzen 5 2400G sport two configurations of this combined die. These are separate from the GPU, so the processor can do things like refresh the screen and decode motion video without having to keep the GPU portion powered up. In these APUs, those are joined by multimedia engines and a display engine. As with the other Ryzens, the memory controllers and I/O hubs are also connected to the Infinity Fabric. The new APUs, by contrast, match a single CCX with a Vega GPU on a single die, again using Infinity Fabric between them. The first Zen chips used a die that joins a pair of CCXes into a single eight-core/16-thread unit with AMD's Infinity Fabric between the CCXes the desktop Ryzens have one pair, the high-end ThreadRippers have two pairs, and the Epyc server chips have four pairs, for a total of 32 cores and 64 threads. The basic building block of the Zen architecture is a "core complex" (CCX), which is a block of four cores/eight threads combined with a level 3 cache shared across all four cores. (AMD is regrettably no longer using its much more concise "Accelerated Processing Unit" (APU) terminology for CPU-GPU combinations.) The first two chips to use the "AMD Ryzen Desktop Processors with Radeon Vega Graphics" moniker were released today. A few mobile processors that combined Zen with a GPU hit the market late last year, and desktop parts were promised for February at CES. That made them appealing to enthusiasts and certain high-performance markets but irrelevant to Intel's bread-and-butter market. The first wave of Ryzen chips all needed to be paired with video cards. In both the laptop and the mainstream and corporate desktop markets, most processors sold combine a CPU with a GPU, while discrete GPUs are reserved for high-performance, gaming, and other specialized systems. However, AMD still didn't offer Intel much competition, because its chips lacked an important feature: integrated GPUs. Last year's release of the Ryzen processors, built around AMD's new Zen core, was a major event for the chip company: after years in the doldrums, AMD finally had processors that were credible alternatives to Intel's chips.
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