Actually, for me, 55 on POST display on ANY 1155 BOARD is a timing or voltage issue, not anything else. Get 23, and you might as well forget it, but 55 can be dealt with.
I run 2750 Mhz with all DIMMs populated with 0.925 V VCCSA/IMC, and 1.05 VTT, no matter what board. Only one Z77 board has issues wit hthat, and that is the Gigabyte Z77X-UP7, where you need to use specific BIOS for whatever IC you use, at least, to get that memory scaling without increasing VTT or IMC/VCCSA.
I've been clocking ram on these boards the past two months(with about 5 more missing there):
http://img.techpowerup.org/130104/DSCF7333.jpg
http://img.techpowerup.org/130104/002.jpg