Given that the there is a lot of case in front of the point where the PSU will stick out from, along with all the other weighty components of the PC (especially Heatsinks, GFX cards, and hardrives) I wouldn't have expected it would tip - it should be more than compensated for. Also, a PC doesn't tend to accelerate a lot or have torque applied at that point (unless you tend to take out your frustrations on your PC )