We already have a barebones tool for testing our PC’s VR readiness from Oculus, but Valve is upping the ante a bit, releasing a SteamVR Performance Test to the masses. It’s free, and you don’t need an HTC Vive VR headset (or any VR headset) to run the benchmark, though you will need to have Steam installed. Valve’s test drops you into an Aperture Science robot repair facility (those of you who’ve played Portal 2 will instantly recognize the aesthetic) and simulates a…