Gigabyte 7970 won't work.

Hey !

I recently bought new Gigabyte 7970 OC, but i can't get it work.

The problem is that when i try to boot with the card, all i get is just serval restarts, and black display saying: "No input signal" My Windows 7 Ultimate x64 won't boot.
Fan's of the card do spin.

I used to have Nvidia gt 440, and it worked fine, but i decided to upgrade to beter card.
I used few other cards for test:

Club Raedon HD 3450: Worked
Club Raedon HD 5450: Worked

Raedon X850 PRP: Worked
(I was rely surprised about that, cause that card is so old, and it has been in my brothers toy box last 2 years. :/ )

And, Gigabyte Radeon HD 7750: This card has a same problem.
But i get 7750 work, by setting my CPU and Memory to default frequency.
However, this card causes system crash sometimes, when computer is highly loaded. (Gaming) Also i get weird pixel storm in games.

With 7970 I have tried also CMOS clearing, and CPU underclocking. Still same prob.
And what comes to bad drivers, it doesn't mater cause i can't go even that far in booting.
Sadly i don't have mobo's POST alarm, or any led's in it.

I don't have another rig to test if that is faulty card. I don't even think that is faulty..


My guess is that my PSU can be faulty.
That because all low end card works properly, and little problems appear with 7750 (400w)
Other cards only draws around 300w




My rig:


Windows 7 Ultimate x64
Intel core i7 3770
Corsair Vengeance 1600mhz, 32gb Quad
OCZ Vertex 3 SSD
GIGABYTE GA-B75M-D3H MOBO
Corsair CX 750w PSU

I really hope that i get 7970 work, before time go past it :/

Any help is appreciated !
I will post more info if needed.
Thanks.


PS.
Im using now 7750, and i did just, 10 seconds ago, get sudden black screen, where i saw my mouse, and it was blinking ?
Then i get message: "Google Crhome crashed, do you wanna restart it ?"

Card: GIGABYTE - Graphics Card - ATI - PCI Express Solution - Radeon HD 7000 series - GV-R797OC-3GD
PSU: CORSAIR CX Series CX750 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply - Newegg.com

Yes, I'v reseated card, and i'm sure that power cables are connected.

I use 8 pin and 6+2 pin cables to power the card.

I have tried to boot with fresh hdd, and fresh Windows 8 on it.
I think that it's not caused by drivers, cause 7750 uses same drivers that 7970 do.
And sorry, i meant 6 + 6+2 pin connectors. But makes no difference.

I don't have linux, but i can get evaluation copy for test, if you think that's worth to test ?

I think only possibilities are faulty mobo (unimaginable) and PSU.

I think i need way to test that PSU, and also the card itself.

A couple of questions:

Does the PC display POST messages with the 7970?

Can you boot Windows in safe mode?

No, i can't even enter to the BIOS.
Only thing i get is serval restarts and empty screen.

I don't have post beeper installed on MOBO, so i don't know what's the code is.
Still i believe that's a power issue of PSU.

I will tell more information when i get any. I'v heard that other 7970 users have the same prob.

HellShell said:

The problem is that when i try to boot with the card, all i get is just serval restarts, and black display saying: "No input signal" My Windows 7 Ultimate x64 won't boot.
Fan's of the card do spin.

HellShell said:

No, i can't even enter to the BIOS.
Only thing i get is serval restarts and empty screen.

First check out Solarstarshines suggestion to make sure it's not some loose components keeping the system from booting. That said...

This most definitely indicates a non-working card. Why is the question? That even if it was a driver issue, you would still get a Bios/Boot screen as video drivers aren't needed for that. No screen picture whatsoever indicates a dead or improperly functioning card.

That said, check BOTH outputs (DVI/HDMI) of the card just to make sure one isn't bad. If that doesn't work, check to see if the card is getting the proper power, and that connections are correct.

If all is good there, it is possible that you simply got a DOA (Dead On Arrival) card. It happens. Return it for a new one.