Negative slack of Setup found by TimeQuest

Core performance is theoretical. Sometimes DSP designs can run close to that fast because they literally pipeline between almost every level of logic, but 9 levels of logic won't run that fast. I didn't see if any failing paths were in the LVDS block, but the top failing paths were from the RTL. Can you pipeline it.

300MHz is do-able for some stuff, but it's not easy. (Heck, lots of Stratix designs don't run that fast.)

FYI, I just looked at a design that won't run at 20MHz in Arria II, which seems wrong at first glance. I looked and the critical path has over 400 levels of logic. So it varies...