Intel will release it's 6-core Intel "Dunnington" processors in September.
The 6-core Dunnington line-up will include three models: Xeon X7460 with 2.67GHz clock frequency and 130W TDP, Xeon E7450 with 2.4GHz frequency and 90W TDP and low-voltage Xeon L7455 with 65W TDP and 2.13GHz clock speed. All CPUs will be built with Intel's new 45-nm Penryn technology and will support 1066MHz bus speed. Xeon X7460 will be equipped with 16MB L3 cache while Xeon L7455 and Xeon E7450 will have a 12MB L3 cache onboard.
New Xeon X7460 and Xeon L7455 processors will be priced at $2729, and Xeon E7450 at $2301.
No official announcements for 6-core chips for desktop and laptops yet.