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Restarts while graphically intensive moments when gaming

Hello forum,

Here are my specs:

Intel Core i5 4670K @ 4.0GHz
Cooler Master D92 CPU Cooler
Corsair Carbide 100R Windowed
Sapphire Radeon R9 280
HyperX Fury 4GB X 2 1866MHz CL10
Rex Cool R2-600 V2.3 PFC (Used - Don't know the exact age)
MSI Z87-G43 Motherboard
Intel SSD 530 series 120GB

CPU Temps - 38-40° idle, 72-75° Prime 95

GPU Temp 36-38° Idle, 60-70° Furmark 1920x1080 8 x AA

This started recently (2 weeks). Doesn't restart during Furmark or Prime. I play Dota 2. At the end while the ancient is destroyed or during a large battle, the PC suddenly restarts. No UPS.

Help is much appreciated.
Thanks Forum
2 answers Last reply Best Answer
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  1. Best answer
    1st suspect would be the power supply, especially since it is a lesser known brand and most likely oldish.
    Try again with another, newer psu, before going out and buying another one - if possible.
  2. I continue to find it a bit odd that after all the info available online about power supplies that there are builds done with expensive parts that are being powered by bad power supplies that can damage all the other components and turn a $1,000 computer into $30 worth of scrap metal.

    First two links when doing a search for that brand of PSU are warnings not to use it.
    https://www.google.com/#q=rex+cool+psu+review

    Power supply is first to get swapped out before anything else is checked.
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