Take a look at the collage of All Computer Companies brand logo and some Gaming Brand Logo design. These companies evolved over the time, so does their brand logo also changes with respect to that. (Click on Image for Larger View)
The Idea behind the unique logo design is different for each company. On top of that, what you can see here is principle of each company remains same while creating a brand logo.
Take a look at the Gaming computer companies logo here. (Click on image for larger view)
Finally, what difference you can see here is the Gaming Brand Logos are more focused on sharp look and vivid design. Because, they represent More diverse kind of their audience.
Credit
Collage Design: Himalay Patel from Bond High Plus.
Logo Credit: Dell, Acer, Asus, Benq, Compaq, Gigabyte, Intel, Gateway, HCL, HP, Samsung, Lenovo, Logitech, IBM, LG, Nokia, Panasonic, MSI, Sony, and Toshiba.
Gaming Brand Logo Credit: Razor, Sapphire, AMD Radeon, CM Storm, Nvidia, Corsair, Gigabyte OC, MSI Gaming, GSkill and Cooler Master.