1024000 = 1MB which is extremely NORMAL; you'll loose more once the OS is installed!
You are FINE!!! Okay to Go! There's nothing to solve!
never seen this type of situation, not even on my 3 laptops, 2 with 3 GB ram and other one with 4GB memory.
why it happens? that's too on POST screen. memtest was fine, no error. I thought it too be a G Skill failure. Actually it is my new build after 9 long years. I was used to laptop, needed a good desktop for my graphics editing.