There is great synergy between Open Compute and OpenStack: both are communities working to a cloud computing industry that is open and collaborative across the entire solution stack.
The Open Compute Project has a high degree of synergy with OpenStack because it ultimately becomes the foundation, or the platform, on which the operating system of the cloud can run. In very similar fashion, Open Compute has a large community of people working together to optimize and define what is needed in data centers and hardware platforms. When you have multiple people working together in the open, you can accomplish great things.