DDR3 burst lenght

I agree that there will be a benefit in such a streaming application, where you're transferring large, consecutive chunks of data around.

Yes, the handbook statements are correct. However, the memory device only supports burst length of 8. If you're already at 4 I shouldn't expect any huge increase in performance. I expect it'll be relatively modest. As mentioned before, setting the Avalon controller with a burst length any longer is unlikely to yield any performance advantage.

Cheers,

Alex