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Installed a new GPU. Two PSU's have failed since installing.

So long story short. I just bought an R9 Fury. Love the card to bits, but I've now had two power supply failures after recently buying it. I'm hoping it's just being unlucky but I'm really hoping it's not the GPU killing the PSU's.

The two power supplies that failed:

Corsair CX750M (Rehashed edition) - This survived since May
Corsair AX760 died literally the day I got it, although it was factory refurbished

My current PC specs:

i5 4470
Sapphire R9 Fury Nitro
16GB DDR3 RAM
MSI Gaming 3 Motherboard
1x SSD
3x HDD's

New PSU is a replacement CX750M from Amazon.

Please help me shed some light on this :(
6 answers Last reply Best Answer
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  1. The Corsair CX series is very low quality, I'm not surprised it died.

    To be refurbished, a power supply has to return to the factory. Why would it be returned to the factory? Because someone either didn't like it or they RMA'd it because it was faulty. Never buy refurbished power supplies.

    Try one of these.
  2. Taafe said:
    So long story short. I just bought an R9 Fury. Love the card to bits, but I've now had two power supply failures after recently buying it. I'm hoping it's just being unlucky but I'm really hoping it's not the GPU killing the PSU's.

    The two power supplies that failed:

    Corsair CX750M (Rehashed edition) - This survived since May
    Corsair AX760 died literally the day I got it, although it was factory refurbished

    My current PC specs:

    i5 4470
    Sapphire R9 Fury Nitro
    16GB DDR3 RAM
    MSI Gaming 3 Motherboard
    1x SSD
    3x HDD's

    New PSU is a replacement CX750M from Amazon.

    Please help me shed some light on this :(


    PCPartPicker part list / Price breakdown by merchant

    Power Supply: EVGA 750W 80+ Gold Certified Fully-Modular ATX Power Supply (£99.98 @ Novatech)
    Total: £99.98
    Prices include shipping, taxes, and discounts when available
    Generated by PCPartPicker 2016-08-10 01:24 BST+0100
  3. Just for giggles, could you try shaking the card and seeing if you can hear anything loose inside?
  4. Well the Fury card when at full power draw in watts is about 375W on it`s own Tafe.
    In fact I just bought the Sapphire Nitro fury card about 4 days ago.

    And I am running it on a Thermaltake 750w power supply with no problems.

    If you are going to run a card like the fury in your system you need a good quality power supply at a Tier 1 rating.

    Buy a well know marketed, branded one, minimum recommended for running a system with a fury card is 650w.
    And it also has to have a high amp rating for the 12v power rails Taafe.

    If you have bought power supply from a local computer shop, the supplys tend to be poor quality and very low priced for the wattage output that they quote.

    And often don`t in fact reach the wattage out put they claim to.

    When it comes to wattage output you have two stated values.
    When a power supply for example states 650w peak.

    It means for a limited amount of time in excess power demand it will deliver 650w for example up to 60 seconds.
    If the power required and the draw is constant the Psu will overload and break.

    The CX750M should power the system fine, it`s a tier 1 or 2, power supply so it should not have a problem.
    If you experience failures, it greatly depends on how much hardware you have fitted to your system as well as the fury card.

    You have to calculate how much total wattage the other components of your system consume, from the 12v power rails of the Psu, and also the amount of Amps.

    Then you have to look up just as much maximum wattage the fury card uses what it also requires from the 12v power rails of the Psu.

    The system may be fine on watts, but it may be the fact that the amp rating provided by the Psu is the problem as to why the Psu`s you are buying, are breaking Taafe, because that draw is too high for what the power supply can provide.

    That will also break a power supply, or cause damage to it Taafe.
    To be honest I`m surprised because a CX750M delivers about 62 amps from the 12v power rails.
    So it should work right, the wattage is enough and the amp rating is high.
  5. IIRC the rehashed versions of the CX power supplies are vastly superior in quality to the older models. Or am I mistaken? I'll use the refund from the dead AX and buy a decent power supply then :) Thanks for all your comments. The current 750 is lasting so far.
  6. Best answer
    It's better than the original, yes. But I don't consider it good enough quality for me to recommend it.
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