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Altera_Forum's avatar
Altera_Forum
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10 years ago

Cyclone V speed is much slower

Hello. I am new to Cyclone V. I took my design for Cyclone III and recompiled it with Quartus II web 13.1. From the timing analyzer, I can see that the maximum clock rate is only 84 Mhz while I was...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

Ok that sounds wrong. I expect a significant increase in performance for Cyclone V from Cyclone III. My guess is there are some false paths that are getting ignored in the conversion, (IE the PLL Changed, so the old SDF file isn't valid anymore).

I would look at that. If you can send a timing report for both the designs we can look at it.

Pete