On my desktop when I open up system information in accessories, I see "System Manufacturer" listed for System Manufacturer. Likewise, for the model it says "System Model". My desktop specs are on my account's listed specs. I've heard that it is possible to change this value by editing your BIOS or something.
System Manufacturer/Model Number iBuyPower Chimera X58 OS Windows 8 Pro x64 CPU Intel Core i7 920 Motherboard Asus P6T Deluxe V2 Memory 12GB (2GB x6) Triple Channel DDR3 1333 MHz Graphics Card ATI Radeon HD 4870 X2 2GB GDDR5 Sound Card Integrated Digital HD 7.1 Surround Sound Monitor(s) Displays 24.6-inch ASUS VW246H 20000:1 Contrast, 2 ms response time, Screen Resolution 1920x1080
Keyboard Razer Lycosa Mouse iBuyPower Ergonomical Internet Mouse PSU NZXT 800W Gaming Series Case Guardian Inferno (Custom Painted NZXT Guardian 921) Cooling Thermaltake V1 Fan Cooling System OC Proof Hard Drives 1 TB 7200 RPM SATA II 3 GBps 16MB cache Internet Speed 11 MBps High-speed Cable