After researching for some time, we have found manufacturer backdoors inside the chip which give you full control over the chips (ASM1042, ASM1142, ASM1143).
Severe Security Advisory on AMD Processors Whitepaper pdf
唔睇都唔知Asus子公司 Asmedia因為產品安全隱患, 被美國聯邦貿易委員會判罰!
We note with concern that AMD's outsource partner, ASMedia, is a subsidiary of ASUSTeK Computer, a company that has recently been penalized by the Federal Trade Commission for neglecting security vulnerabilities and put under mandatory external security audits for the next 20 years
it came to believe that AMD wouldn't be able to fix the problems for "many, many months, or even a year." Instead of waiting a full year to reveal these vulnerabilities, CTS Labs decided to inform the public of its discovery.