. . . . "OWC offers memory modules for Mac Pro 8-core/Quad-core Xeon systems at capacities of 2.0GB for up to 16GB priced as low as $86.19 per GB and 1GB memory modules up to 8GB for as low as $96.13 per GB. 4GB modules up to 32GB are available at $205.59 per GB for customers employing high-memory intensive applications, such as audio/video, photo, 3D modeling, and other applications where the extra memory" .