Shutdown after 20 mins of gaming...sometimes

Computer instantly shuts off after about 20-25 minutes of gaming, sometimes. I have ran, Prime95, while running HDTune read/write test, while running GPU benchark software for hours on end. Won't die. Start playing GTA IV or Skyrim or something....20 mins later it dies but not all the time. Checked PSU for damage, no visible issues like blown caps for anything. I managed to get a SpeedFan log the last time it crashed. What do you guys think, can the PSU go bad without throwing off voltages? The PSU is quite old, probably 7 years I have had to replace the fan in it already because of bearing noise.. Also, there is an anomalous "04" on the last line where the other lines are "2.04," IDK if it was writing that line when it died or if that is a clue. Windows reliability reports it as an improper shutdown with no other issues logged. System is not overclocked currently and all auto-shut down features have been disabled.


Asrock FM2A78MHD+
A10-7700k
G.Skill DDR3 2133 2x4GB
2x 1TB Seagate drives
1x Corsair Hyperx 120GB SSD
Lite-On DVDRW Combo
CoolerMaster 500W PSU
Corsair H100 Water Cooler


Seconds System CPU AUX SMIOVT4 SMIOVT5 SMIOVT6 HD2 HD0 HD1 GPU 3Vsb Vbat Vcore +12V AVcc 3Vcc VIN1 VIN2 VIN3 Sys CPU Aux


66254 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 8.0 3.44 0.0 1.1 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66257 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 8.0 3.44 0.0 1.1 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66260 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 10.0 3.44 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66263 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.44 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66267 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.44 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66270 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.44 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66273 33.0 44.5 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 8.0 3.42 0.0 1.12 11.99 3.36 3.36 2.04 1.69 2.04 100.0 100.0 40.0
66276 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 10.0 3.42 0.0 1.12 11.99 3.36 3.36 2.04 1.69 2.04 100.0 100.0 40.0
66279 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 6.0 3.42 0.0 1.12 11.99 3.36 3.36 2.04 1.69 2.04 100.0 100.0 40.0
66282 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 11.0 3.42 0.0 1.12 11.99 3.36 3.36 2.04 1.69 2.04 100.0 100.0 40.0
66285 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.44 0.0 1.12 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66288 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 6.0 3.44 0.0 1.12 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66291 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 6.0 3.44 0.0 1.12 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66294 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.44 0.0 1.12 11.99 3.36 3.34 2.04 1.68 2.04 100.0 100.0 40.0
66297 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.42 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66300 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 7.0 3.42 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66303 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 6.0 3.42 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66306 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 39.0 8.0 3.42 0.0 1.11 11.99 3.36 3.36 2.04 1.68 2.04 100.0 100.0 40.0
66310 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 40.0 7.0 3.44 0.0 1.11 11.99 3.36 3.34 2.04 1.7 2.04 100.0 100.0 40.0
66312 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 40.0 8.0 3.44 0.0 1.11 11.99 3.36 3.34 2.04 1.7 2.04 100.0 100.0 40.0
66316 33.0 44.0 -62.5 33.5 33.5 33.5 39.0 31.0 40.0 9.0 3.44 0.0 1.11 11.99 3.36 3.34 04 1.7 2.04 100.0 100.0 40.0