I ordered an ASRock P67 Pro3 off of ebay a few months ago, along with RAM. It didn't work due to a code 19 error, so I contacted ASRock tech support and they sent me a new one. I was working on putting it together today, and it too displayed a code 19 error on the debug. My build is as follows;
The CPU is on the support list 16th from the bottom. I'm not sure of the BIOS version because it didn't ship with a sticker (still not sure why). I got it new in an RMA a few months ago, so I would assume that it would be current. My old board also gave me a code 19 error with a fully updated BIOS chip, so I'm not sure whether it's the BIOS or the CPU.