GPU preventing fans from turning?

[willwang93]

I just completed my new build and am having issues with my GPU. Every time I plug-in my GPU, both the CPU and case fans won't turn. The computer boots and the GPU fans turn, but none of the other fans turn. However, when I unplug and replug all my connections one by one, everything works again, UNTIL I plug-in my GPU again, in which the fans fail again. The fans still fail even AFTER I take my GPU out. The only way to get my fans to work is to replug all of my connections excluding the GPU. Once the GPU is in, the fans fail.

I've been told that I have a defective GPU, but I am still confused because they very first time I booted the computer (to test if everything turned on), everything worked even with the GPU in. Does anyone have any ideas as to why my fans won't engage with my GPU in? Thanks everyone.

My build:

GPU-Powercolor R9 270x Devil edition
CPU: AMD FX-6300 Black
Mobo: Gigabyte 78lmt-usb3
PSU: Corsair CX 500
RAM: Kingston HyperX Fury

 

[Onus]

How old is your Corsair "CX" PSU? I wonder if its +12V is failing. Do you have another PSU and/or graphics card to test? Do you have a Kill-a-watt meter? It would be interesting to see if the load when the graphics card is installed is significantly higher than it should be, perhaps suggesting a short on it that is causing an overload. One would think the PSU would shut off, so it may be a "near" short.

 

[willwang93]

The PSU is brand new, got it from Newegg like 2 weeks ago. I am trying to find another GPU to test. No, I do not have a meter unfortunately. I don't understand why it worked the first time, but not now.

 

[bharathgdk]

http://extreme.outervision.com/psucalculatorlite.jsp Check the PSU Minimum Req. from this link.

The way I see it you aren't getting enough power. Either that or your PSU is failing. Its better to check with a diff PSU.

 

[willwang93]

I have enough power, although does it matter if it's plugged into an extension board as opposed to the wall?

 

[Automatiic]

http://extreme.outervision.com/psucalculatorlite.jsp Check the PSU Minimum Req. from this link.

The way I see it you aren't getting enough power. Either that or your PSU is failing. Its better to check with a diff PSU.

Beat me to it. Probably not getting enough power. AMDs new GPUs are power hungry. Also, I know it seems silly, but make sure all motherboard power connectors are plugged in. 20 or 24 pin for mobo and 4 or 8 pin or a combination of both for CPU. The PCIE slot on a MOBO gives the graphics card 75W and if all of the power connectors on your motherboard aren't hooked up, it won't have enough power to give to everything.

If everything IS plugged in, definitely get a PSU with more power. 600-700W should be great.

 

[bharathgdk]

Okay lets try this. I hope u have a UPS. Just connect Monitor and CPU(Whole Cabinet) And just start off to strike out that Extension Board is faulty. And also check with a diff. PSU. to strike it out. and Later comes GPU.

I'm no 1 shot expert. So this is the method i recommend, hopefully u have the resources.

My personal Experience I bought the MoBo i current have few months back. It worked fine on the day i fixed it. within a matter of 15 mins. Its Dead and I had to give it for RMA. So this isnt to scare u off or something, Its better to take everything into Consideration.

 

[Onus]

The R9 270X is basically a rebranded HD7870. When I'm playing [undemanding] games with mine, my system pulls ~185W from its UPS; you're not likely to be drawing more than 250W under a heavier load.
Do recheck all your connectors.
The extension board should not matter. Make sure it is properly grounded. I can't remember the specifics, but it seems to me some PSUs may behave a little strangely if not properly grounded. This seems like a stretch though.

 

[willwang93]

I checked the power requirements on the site, and it gave me around 345W. PC Part Picker gave me about 363. Both of these are way below 500, so I don't think power is an issue (unless there is something wrong with the PSU). Still not sure what's wrong.

http://extreme.outervision.com/psucalculatorlite.jsp Check the PSU Minimum Req. from this link.

The way I see it you aren't getting enough power. Either that or your PSU is failing. Its better to check with a diff PSU.

Beat me to it. Probably not getting enough power. AMDs new GPUs are power hungry. Also, I know it seems silly, but make sure all motherboard power connectors are plugged in. 20 or 24 pin for mobo and 4 or 8 pin or a combination of both for CPU. The PCIE slot on a MOBO gives the graphics card 75W and if all of the power connectors on your motherboard aren't hooked up, it won't have enough power to give to everything.

If everything IS plugged in, definitely get a PSU with more power. 600-700W should be great.

 

[Onus]

Although the Corsair CX does not hold up in use due to some inferior capacitors, it is still too new for this to be a likely problem. It's possible, but I'm inclined to suspect a problem with the graphics card. An overloaded PSU tends to shut down.
Hopefully you can find another graphics card to test.