15% in shipments of boards and chips as compared to fiscal year 2008, due to strong demand and our transition from previous generations of NVIDIA Quadro professional workstation products to GeForce 8-based and GeForce 9-based products. Sales of NVIDIA Quadro CX for Adobe’s CS4 software, which we launched in the third quarter of fiscal year 2009, also contributed towards the increase in sales in fiscal year 2009.

 

MCP Business. MCP business revenue decreased by 8% to $655.6 million for fiscal year 2009, compared to $710.4 million for fiscal year 2008. This decrease was due to a decline of approximately 32% in sales of our AMD-based platform products resulting from increased competition in AMD-based products, offset by an increase of approximately 120% in sales of our Intel-based platform products. The increase in Intel-based product sales was driven by sales of our GeForce 9400M mGPU, which we launched in October 2008 along with Apple Inc., or Apple, for their new lineup of Mac notebooks, and our new GeForce 9400 and 9300 mGPUs for Intel desktop PCs.  

 

CPB. CPB revenue decreased by 46% to $136.3 million for fiscal year 2009, compared to $251.1 million for fiscal year 2008. The decline in CPB revenue is primarily driven by a combination of a decrease in revenue from our cell phone products and a decrease in revenue from Sony Computer Entertainment, or SCE. The decrease in revenue from our cell phone products resulted from our shift from marketing and developing legacy products to achieving design wins and marketing our newer Tegra products.  The decrease in our revenue from SCE resulted from a decline in license revenue and a decline in royalty revenue that was caused by a lower number of units shipped as well as by a step-down in the per unit royalty rate during the year due to achievement of a unit-based milestone in our agreement with SCE.



Concentration of Revenue

 

        We generated 84%, 87% and 89% of our total revenue for fiscal years 2010, 2009 and 2008, respectively, from sales to customers outside the United States and other Americas. Revenue by geographic region is allocated to individual countries based on the location to which the products are initially billed even if the foreign contract equipment manufacturers, or CEMs’, add-in board and motherboard manufacturers’ revenue is attributable to end customers in a different location.



 Revenue from significant customers, those representing 10% or more of total revenue for the respective dates, is summarized as follows:

 

   Gross Profit and Gross Margin

 

  Gross profit consists of total revenue, net of allowances, less cost of revenue. Cost of revenue consists primarily of the cost of semiconductors purchased from subcontractors, including wafer fabrication, assembly, testing and packaging, manufacturing support costs, including labor and overhead associated with such purchases, final test yield fallout, inventory and warranty provisions and shipping costs. Cost of revenue also includes development costs for license, service arrangements and stock-based compensation related to personnel associated with manufacturing.

 

 Gross margin is the percentage of gross