CPU for Dovecot

[Miloslav Hůla]

Hi,

we are planning to change hardware for our standalone Dovecot instance 
handling ~5800 IMAP users with 1TB mailboxes on local RAID. Is there 
some recommendation about CPU?

We can choose from:
  - Intel Xeon E5-2620v4 - 2,1GHz at 8,0GT 20MB cache, 8core, HT, 85W, LGA2011
  - Intel Xeon E5-2623v4 - 2,6GHz at 8,0GT 10MB cache, 4core, HT, 85W, LGA2011

The difference is about more cores vs. hi frequency.

Thank you, Miloslav