These are implemented by emulation on some TeraScale (microarchitecture) GPUs.
A GPU implementing TeraScale (microarchitecture) version " Evergreen (VLIW5)" is found on Radeon HD 7670 and below branded discrete GPUs.A GPU implementing Graphics Core Next is found on the Radeon HD 7730 and above branded discrete GPUs.Graphics Core Next was introduced with the Radeon HD 7000 Series. The primary competitor of Southern Islands, Nvidia's GeForce 600 Series (also manufactured at TSMC), also shipped during Q1 2012, largely due to the immaturity of the 28 nm process. The Radeon HD 7000 series, codenamed "Southern Islands", is a family of GPUs developed by AMD, and manufactured on TSMC's 28 nm process.
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