Programming a Cyclone III device with a different speed grade - Programming a Cyclone III device with a different speed grade I have a question about programming a Cyclone III device with a different speed grade than the original part. The original design targeted a P/N EP3C55U484C 8 N but none are available. I can get EP3C55U484C 6 N. Are there any issues with using the old image with a different speed grade part? Replies: Re: Programming a Cyclone III device with a different speed grade I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you. Replies: Re: Programming a Cyclone III device with a different speed grade You are moving to a faster part, should not be a problem. The speed is not part of the programming file itself, so it should program just fine. And unless you are doing something sketchy with your design it should work just fine too.