My windows is the same, windows 7 ultimate 64-bit, showing as 8GB in control panel, but 16GB via CPU-z but also 8GB in the bios :/
That much isn't right - as per above would flash bios asap
200~MB is one thing, 8GB is a totally different issue
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.