With a nary a peep from rival Nvidia, AMD today rolled out two additional 28nm graphics cards, both of which are built around the Pitcairn GPU that nestles into the mainstream spot just below Tahiti. The new cards are the Radeon HD 7870 GHz Edition ($349) and Radeon HD 7850 ($249), and they both feature AMD's 28nm Graphics Core Next (GCN) architecture specifically designed for general computing.
"Engineered for supremacy, designed for efficiency and packed with incredible features, the AMD Radeon HD 7800 series offers more than the just world’s most advanced graphics: it offers the incredible performance every gamer deserves," said Matt Skynner corporate vice president and general manager, GPU Division, AMD. "AMD continues to lead the industry in desktop graphics innovation with unrivaled computing and unequaled technologies like our game-changing GCN Architecture."
Nvidia's retort is Kepler, a next-generation architecture of its own that's been much hyped and is scheduled to launch later this quarter. Meanwhile, the Radeon HD 7870 GHz Edition boasts a 1GHz engine clockspeed and 2GB of GDDR5 memory racing along at 1.2GHz on a 256-bit wide bus. It has 20 Compute Units (1,280 Stream Processors), 80 Texture Units, 32 Color ROP Units, and supports the usual assortment of modern day APIs.
The toned down Radeon HD 7850 sports an 860MHz engine clockspeed, the same memory specs, 16 Compute Units, 64 Texture Units, and the same number of ROP Units.