Asus Geforce 770 powers on but isn't detecting

[Not_The_Wires]

(Computer specs at bottom of post)
I think my Asus Geforce 770 is probably dead.

I had a computer build disaster some time ago where I basically wired up my graphics card to the Sata socket on my modular power supply rather than the correct PCI express socket. This blew the motherboard which I've now replaced.

I have the system up and running but it doesn't seem to detect the graphics card

The card powers on, the fans spin and it has two green lights, one above each of the power wires.

Things I've tried to get it to work

I tried installing the drivers from the disk (planning to get the new ones from the nvidia website afterwards) but it wouldn't seem to do anything. I guess it needs to detect the card to install at all?

I updated the bios using the official ASUS bios update program.

I tried a different PCI slot

I've tried wiring it up with a single 8 pin to two 6 + 2 pin cable heads and it turned on with that

Then I tried wiring it up with two 8 pin to two 6+2 pin cable heads - using one head so it was drawing power from two sockets of my modular PSU. Still worked but didn't register.

However just now it came up with a scary blue screen error message. This didn't come up when it was just plugged into one wire.
Oh and now it's doing it with one wire too. Great.

This is a picture of the error message.
https://imageshack.com/i/pa16PPeLj

Whatever I do I can't see any driver installation messages or anything popping up in device manager.
Thus far I'm assuming the card is dead and that's the cause of the blue screen crash.

Have I missed something or do I need to buy a new card?

Thanks for any help you can give.

Computer specs


Processor: Intel i5 4690k
Processor Cooler: Stock intel cooler that came with it (since my dark rock advanced backplate won't fit)
Motherboard :Asus ROG Formula VII
Graphics card: Asus GTX 770 Nvidia GeForce DirectCU II OC 2GB GDDR5 Graphics Card (PCI Express 3.0, HDMI, DVI-I, DVI-D, Display Port, 256 Bit, 3D Vision Ready, GPU Boost 2.0)
RAM: 8GB Corsair vengeance RAM (2 sticks of 4GB) DDR 3
PSU: RM1000 Corsair 1000 watt gold standard fully modular power supply
Hard Drive: 1TB Samsung 7200 RPM
OS Windows 7 64bit

 

[Mouldread]

Well...

I guess you know or at least suspect the answer - you have probably fried your GPU when you plugged in the wrong cable. If it isn't being detected then the only way for you to find out if it still works is to try it on another PC. And... please stop experimenting with the cables.

 

[Not_The_Wires]

Heh the first "experiment" was an accident. The switching between one and two cables was because after much research and asking many questions I can find no definitive answer on whether you should use one or two cables. Various knowledgeable forum members here and elsewhere have argued for either a single cable or two cables. Asus tech support wasn't sure. Corsair tech support said I could use one or two cables. The manuals both in box and online have nothing about it.

Thanks for your answer though, I am thinking it might be a dead GPU but I'm going to run a few more tests. I need to have a look at the bios settings.
Also does anyone have any information on that blue screen?

 

[Not_The_Wires]

Update after additional testing

Also I just had an idea and checked to see if the bios was set to the onboard graphics instead of PCI. When I checked though it seems a moot point, the graphics card isn't detected in the bios. I'm guessing that's another point in favour of a dead GPU


I've tried to install the drivers but it gets part way through the install and says "No compatible hardware found".

Hooking up the DVI cables to either DVI port gets "No Signal" on the monitor. I tried my DVI to HDMI cable (which I know works I've been using it on my PS3 and on the motherboard display slot on this build) and that got no signal too.

Just moved the Graphics card back up to the top PCI slot. The blue screen error doesn't seem to happen now which is a relief.

Looking more and more like a dead GPU to me - but please let me know if I've missed something.