As per i think yes & No too both. Ur not clearly mention ur using dedicated server or not if ur changing from one dedicated server to another there is no change in PR. yes if ur using shared IP then it may help u to gain ur PR. If any doubt pls feel free to ask. Day kevi
PR has nothing to do with IP. But yes, some people report some change in serps after they move site from one server to another.
PR has nothing to do with Ip changes. Though ip change affect is now minimal with serp changes if you have established quality backlinks.
Page rank has nothing to do with Ip changes. PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be.