12 core AMD server CPU's in March

That's the rumor, as reported by Anton Shilov at Xbit:

Advanced Micro Devices will launch its twelve-core AMD Opteron “Magny-Cours” central processing units (CPUs) for high-end servers in March, 2010, sources close to the company revealed. AMD plans to unveil a broad family of twelve- and eight-core chips for multi-processor machines with different performance and thermal design power points.

The mainstream line of twelve-core AMD Opteron 6000-series processors will consist of three chips operating at 1.90GHz, 2.10GHz and 2.20GHz. Besides, AMD will also release highly efficient (HE) and special edition (SE) AMD Opteron 6000 microprocessors with twelve processing engines functioning at 1.70GHz and 2.30GHz, respectively. In addition, AMD plans to launch three standard-voltage eight-core chips at 2.0GHz, 2.30GHz and 2.40GHz frequencies along with two HE eight-core processors at 1.80GHz and 2.0GHz clock-speeds. In order to ensure maximum stability, all AMD’s twelve-core processors will come with reduced clock-speed of integrated memory controller and L3 cache (1.80GHz) compared to six-core and quad-core products.

PCgameshardware.com reports these beasts are already on Ebay:

On Ebay the first offers for Magny Cours processors on Ebay have also been found already – a package of four CPUs for 6000 USD. There also is an offer for a full system with 48 cores including a Tyan motherboard and 64 GByte DDR3-1333 RAM – the price is 20000 USD.