Forum Discussion
Occasional ContributorArria 10 (speed grade 3) has worse timing performance than Cyclone 10 GX (speed grade 5)
As confirmed by @RichardTanSY_Altera , this is expected behavior. Although it is totally baffling that a more expensive device family, combined with a superior speed grade leads to worse timing performance, I am satisfied that my question has been answered.
Occasional ContributorI have found some documentation that seems to confirm that Arria 10 speed grade 3 has worse I/O timing performance than Cyclone 10 GX speed grade 5.
This is from p. 133 of "PHY Lite for Parallel Interfaces Intel® FPGA IP User Guide". I have highlighted the maximum interface frequencies:
It seems like a poor decision to name the speed grades this way. A superior device family (Arria) with a superior speed grade (3) has inferior timing performance to an inferior device family (Cyclone) with an inferior speed grade (5).
