From HardwareHeaven:

The Club 3D GeForce GTX 670 is the fastest and most power efficient GPU after the recently introduced GTX 680. But we didn't stop there. GPU Boost dynamically boost clock speed for performance. New FXAA and TXAA modes eliminate jagged edges. And NVIDIA Surround lets you game on three monitors from a single GPU.

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From TechPowerUp:

Earlier this month AMD launched their Radeon HD 7800 Series. The GPU, Pitcairn, is a downscale from the HD 7900 "Tahiti" silicon, which introduced AMD's new Graphics Core Next architecture. Targeting a wide price-range between $250-$350, the HD 7800 series falls into the market-segment both AMD and NVIDIA have known to refer to as the "sweetspot" segment. Apart from 1280 stream processors, Pitcairn has 80 Texture Memory Units (TMUs), 32 ROPs (Raster Operations), and a 256-bit wide GDDR5 memory interface, holding 2 GB of memory.

From Hardware Heaven:

Yesterday NVIDIA launched their new desktop GPU range (previously known as Kepler) with the introduction of the GeForce GTX 680. This new GPU is significantly different in design to the last generation with advanced power technology as well as the latest features including support for PCI-Express 3.0, DirectX 11.1 and 4K displays as well as Stereoscopic 3D and surround gaming.

From Guru3D:

AMD recently released two new products, the Radeon HD 7850 and 7870.

These two new mid-range cards are going to shift the dynamics in the graphics arena alright, as the entire package including performance is really impressive for the 7800 series. So with AMD's 7700 series barely released we now see Pitcairn, AKA the 7800-Series. A product series that is to replace the 6800-series performance-wise, it is based on AMD's 28nm process and of course the latest Graphics Core Next GPU architecture.