You are correct it was AMD. From the early 2011 MBP 15 inch spec: “AMD Radeon HD 6490M graphics processor with 256MB of GDDR5 memory on 2.0GHz configuration;

You are correct it was AMD. From the early 2011 MBP 15 inch spec: “AMD Radeon HD 6490M graphics processor with 256MB of GDDR5 memory on 2.0GHz configuration; or AMD Radeon HD 6750M graphics processor with 1GB of GDDR5 memory on 2.2GHz configuration”