asus m5a97 r2.0

Jun 21, 2018
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OK so i have a computer i built and it works to and extent. My motherboards pcie x16 slot doesnt work right it shows video when i put my r7 240 in but its laggy and wont open games. So i put in the second slot its only a pcie x4 but it works. So what does anyone think is wrong?
 

List the name of all the parts in your machine including the operating system. What is important is how they all work together in this PC, not just separately in other computers.