faulty psu or gpu?

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Georgetoker_21

Georgetoker_21

Prominent
Jul 26, 2017
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510
Hi,
Turned on my pc only to find that it wouldnt boot with only a second of power before it cut out. After methodically disconnecting various cables and trying again i found that the PC boots as long as my 6+2 pin pci-e isnt connected to my R9 390 GPU (powercolor), i was wondering if the fault lies in either my VS650w (admittedly underpowered) corsair PSU or the GPU?
Other specs include an Asus M5A97 mobo, an amd fx 4300 cpu and 16gb of hyperX fury red DDr4 ram
Is my psu simply fried or do i have to shed out for a new GPU?
Note: PC boots with the single 6 pin pci-e cable connected to gpu, have been using this rig for over a year now with no issues, what could of made it gone wrong randomly?
 
Solution
bloodroses
Easy way to find out is do you have a friend or computer shop nearby to test the GPU in a different rig? If it works fine there, then it's the PSU. I wouldn't not recommend testing the PSU unit in the same way though since if it is going bad, it 'could' potentially damage other hardware. Very rarely have I seen a case where a faulty GPU damaged other components. Now overdrawing the power supply with a GPU, that's another story....
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elbert

elbert

Glorious
Jan 11, 2005
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The 390 will run on 500w so here is a good quality PSU to test the card. Also if want a bit of an update if the video card is bad get the 1070 or wait for Vega.
PCPartPicker part list / Price breakdown by merchant

Video Card: Gigabyte - GeForce GTX 1070 8GB G1 Gaming Video Card ($434.98 @ Newegg)
Power Supply: SeaSonic - S12II 520W 80+ Bronze Certified ATX Power Supply ($34.98 @ Newegg)
Total: $469.96
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-07-26 14:18 EDT-0400
 
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Georgetoker_21

Georgetoker_21

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Jul 26, 2017
8
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510


Any idea which of the two is not working as not keen on spending money on one only to have to replace the other?
 
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elbert

elbert

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Jan 11, 2005
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Nope and to test the PSU would cost probably as much as the new PSU. A backup PSU is always a good thing to have and the S12II is a great quality one. If the rx570 prices come down it would be a good upgrade. Bit mining tho has the price crazy high right now.
 
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Georgetoker_21

Georgetoker_21

Prominent
Jul 26, 2017
8
0
510


I think ill have buy a new psu then, any recommendations? I was looking at the EVGA 750w GQ or the 850w version; hopefully the extra power and the fact its gold certified should be enough to get my rig up on its feet again. Something around the £100 or lower range preferably.
 
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Georgetoker_21

Georgetoker_21

Prominent
Jul 26, 2017
8
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510


Isnt 520w a bit on the low side? I only ask as the reccomended PSU for the GPU was 750w or above
 
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Finstar

Finstar

Honorable
Sep 7, 2013
2,420
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12,640
My recomendations are Seasonic and Super Flower. Evga is good too but they're not an oem so i'd recommend checking who's the oem of what ever psu you're going to buy. The GQs you mentioned seem to be from FSP which is a pretty good brand and going for either one of those would not be a bad decision.
 
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bloodroses

bloodroses

Distinguished
Jan 27, 2013
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Easy way to find out is do you have a friend or computer shop nearby to test the GPU in a different rig? If it works fine there, then it's the PSU. I wouldn't not recommend testing the PSU unit in the same way though since if it is going bad, it 'could' potentially damage other hardware. Very rarely have I seen a case where a faulty GPU damaged other components. Now overdrawing the power supply with a GPU, that's another story....
 
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Solution
Georgetoker_21

Georgetoker_21

Prominent
Jul 26, 2017
8
0
510


Many thanks, will order and let you know how it goes!
 
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elbert

elbert

Glorious
Jan 11, 2005
9,704
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46,965


Nope the video card plus system only pulls 372w. The 750W is enough for 2 X 390's.
http://www.guru3d.com/articles-pages/radeon-r9-290-review-benchmarks,10.html
System Wattage with GPU in FULL Stress = 372W

AMD R9 290 Crossfire - On your average system the cards require you to have a 700 Watt power supply unit as minimum.
Click to expand...
 
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