I just finished building my first pc and I bought an ASRock Z77 Extreme4 motherboard and an i5 3570K to go along with it. I put it all together and when I try to power up the system, Dr. Debug first says "20" for a couple seconds, and then displays "53". I don't see error code 20 anywhere in the manual but 53 is "No usable memory detected." I have 2 sticks of G.Skill 2133 4GB ram. There are 4 slots and I have installed them in every possible combination of slots. Always gives me "53".
there is a list of compatible memory's http://www.asrock.com/mb/memory.asp?Model=Z77%20Extreme... which mine of course is not listed on. I can buy a new memory but before I do I was wondering if it might be a problem with my mobo? l looked up which is the best memory for this mobo and a lot people recommend stuff thats not even listed on the list.
The list you speak of is called the Quality Vendor List. This list doesn't necessarily mean that the modules listed are guaranteed to work. Even if the kit you have was on the list, it is possible that it is defective. People make recommendations off of personal experience, usually, so chances are good if something not on the list has worked or others, it will work for you as well.
The unfortunate truth in this matter, though, is that if you cannot get into your BIOS/UEFI, you may have to acquire new/different RAM to continue testing. Alternatively, you could download MemTest86+ and either make the bootable USB, or burn the test to CD, and then see if you can test this RAM in another computer.
I will be returning my memory and getting something off of the QVL, if for nothing else than to have piece of mind that it is not a "mobo support issue." Dismayed though because the QVL list does not seem to have any 4gb, 1600 Ghz, in a 2 pc kit...which is kind of a set up I was shooting for based on what I've read as being most beneficial without breaking the bank...