ASRock H81M-HDS (Micro ATX): OC to 4.5 Ghz.
ASRock H81M-ITX/Wifi (Mini-ITX) : See page 61 of the owners manual published May 2014:
http://download.asrock.com/manual/H81M-ITXWiFi.pdf)
ASRock H81 Pro BTC (ATX)
ASRock Fatal1ty B85 Killer (ATX) : Several Newegg reviewers claim Non-Z overclocking was working back in March 2014.
ASRock H97M Pro4 (Micro-ATX) : See page 70 page of the following owners manual published April 2014 under "4.3 OC Tweaker Screen" for Non-Z overclock-->
ftp://66.226.78.21/manual/H97M Pro4.pdf )
ASRock Fatal1ty H97 Performance (ATX) :See review dated June 30th, 2014-->
http://www.pcgameware.co.uk/reviews/...rboard-review/ )
Gigabyte H81M-DS2V (Micro-ATX): OC to 4.39 GHz.)
GIGABYTE GA-B85N Phoenix-WIFI (Mini-ITX)
Gigabyte GA-B85M-DS3H (Micro-ATX) : Reported to Non-Z OC Pentium 3258 to 4.3 Ghz
Gigabyte GA-H97M-HD3 (Micro-ATX):
MSI B85-G43 gaming (ATX) OC was 4.5 Ghz.
http://www.overclock.net/t/1500423/non-z97-z87-boards-than-can-overclock-the-pentium-k-g3258