Your motherboard supports 3rd Gen. Intel® 22nm CPUs and 2nd Gen. Intel® Core™ CPUs (LGA1155 socket) and supports intel i5-2500k : Gigabyte GA-H61M-S1 (rev 2.0) processor support and specifications >> http://www.cpu-upgrade.com/mb-Gigabyte/GA-H61M-S1(rev._2.0).html
Please check your motherboard version for better compatibility check.
Your motherboard supports 3rd Gen. Intel® 22nm CPUs and 2nd Gen. Intel® Core™ CPUs (LGA1155 socket) and supports intel i5-2500k : Gigabyte GA-H61M-S1 (rev 2.0) processor support and specifications >> http://www.cpu-upgrade.com/mb-Gigabyte/GA-H61M-S1(rev._2.0).html
Please check your motherboard version for better compatibility check.