OCZ is a mixed bag, as their power supplies are split between 6 different manufacturers. In this case, the ModXStream Pro 700w is made by Sirtec. Going by The HardOCP review
the results are not impressive, especially since it failed at 45°C, a not uncommon temperature when you combine high ambient temps, not very high efficiency, high load, and especially with a top mounted PSU orientation. So I would agree with Thanny that it needs to be replaced by something of quality, preferably SeaSonic or Enermax, or for a little less the PSUs they make (Corsair, XFX, PC P&C, Sapphire), of 750-850w, both for peak efficiency and longevity.
ASUS Sabertooth 990FX/Gen3 R2, FX-8350 w/ Corsair H60, 8 GiB G.SKILL RipjawsX DDR3-2133, XFX HD 7970 Ghz, 512GB Vertex 4, 256GB Vector, 240GB Agility 3, Creative X-Fi Titanium w/ Creative Gigaworks S750, SeaSonic X750, HP ZR2440w, Win 7 Ultimate x64