It's the blue-green square here: http://guide-images.ifixit.net/igi/IAbJlQbhPUYnQMOS.huge http://guide-images.ifixit.net/igi/IAbJlQbhPUYnQMOS.huge I'd say it l

It's the blue-green square here: http://guide-images.ifixit.net/igi/IAbJlQbhPUYnQMOS.huge http://guide-images.ifixit.net/igi/IAbJlQbhPUYnQMOS.huge I'd say it looks roughly equivalent to two 8GB DIMMs.