Slight stuttering while playing melee

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The fps counter displays a consistent 60 FPS but I keep getting occasional stuttering from the game, like where it skips displaying half a second of gameplay every so often. It runs smoothly half the time but randomly jumps on occasion. The game is still playable but I want to make it consistently smooth 100% of the time. Is this normal or is there something wrong with my set up? My computer specs are attached below and I'm using the OpenGL backend. Thanks!