page_title: Radeon HD 7000 series
section_title: Desktop products
hierarchical_section_title: Radeon HD 7000 series / Desktop products
caption_attribution_description: English: A close-up image of the die and package of an AMD Radeon HD7870 graphics card.
context_page_description: The Radeon HD 7000 series, codenamed "Southern Islands", is a family of GPUs developed by AMD, and manufactured on TSMC's 28 nm process. The primary competitor of Southern Islands, Nvidia's GeForce 600 Series, also shipped during Q1 2012, largely due to the immaturity of the 28 nm process.
context_section_description: The 28 nm product line is divided in three dies (Tahiti, Pitcairn, and Cape Verde), each one roughly doubling in shader units (32, 20 and 10 respectively). While this gives roughly a doubling of single-precision floating point, there is however a significant departure in double-precision compute power. Tahiti has a maximum ¼ double precision throughput relative to its single precision throughput, while the other two smaller consumer dies can only achieve a 1/16 ratio. While each bigger die has two additional memory controllers widening its bus by 128 bits, Pitcairn however has the same front-end dual tesselator units as Tahiti giving it similar performance to its larger brethren in DX11 tessellation benchmarks.
caption: The die and package of a Radeon HD 7870 graphics card.
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