7970 only Running PCI-E 4x (solved)

Hardware Hub GPU
1

Hi everybody! after months of beeing a youtube creep that just subbed there and stuff i finally slapped me a account on here since i was unable to google my issue :)

I noticed since days that my Gigabyte 7970 ( GV-R797OC-3GD ) ony runs on PCI-E 4x mode.

Not so sure if it was since i build the pc but GPU-Z and in linux i get a 4x PCI-E readout. 

LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

So i am confused what might be the issue. I don't want to go out and blindly RMA or buy a new PSU and motherboard.

Also the GFX uses the default small power plug from the psu and the dual molex adapter since that dam PSU is outdated...

Specs:

GFX: Gigabyte 7970 ( GV-R797OC-3GD ) 

Mainboard: GA-990XA-UD3  (rev 1.x) (edit, posted wrong name >.<)

AMD FX-8320

Patriot 8GB 1600mhz

Creative X-Fi Fatal1ty (old pci card)

PSU: be-quiet BQT-E6 700W

 

2

Just curious, why are you using a molex adapter if the spec sheet for that PSU states you have 2 6+2 pin PCI-e power connectors?

3

i do but they are backwards. i would have to soder them off and the other way round on.

4

Pictures? Explain to me how the connectors are backwards, it doesn't make any sense unless you have a PSU that was improperly built.

5

Sorry about the quality but that was the only charged cam around the house and thats pretty much how the plug looks next to the molex adapter i use. i cannot put it on the other side because its too short.

I really tried putting that upside down and so on..

Also i changed the slot of the GFX and it works in the middle PCI-E slot with PCI-E 8x. 

....WEIRD

6

Pull out the pcie card the gpu will run at x16 (i asume you have the pci card in the x8 slot?)

From gigabite --> ((Note 4) The PCIEX8 slot shares bandwidth with the PCIEX16 slot. When the PCIEX8 slot is populated, the PCIEX16 slot will operate at up to x8 mode.

7

i tried with the soundcard removed. it still was at 4x. 

besides it was an PCI card not PCI-E

8

So you have this card in the first full size PCI-e lane on the board? and its reading as 4x..... hmm

I know its a long shot, but try updating the Mobo BIOS to a newer version.

9

anyone correct me if I am wrong, 

But the red one is for PCIe, and the black one is for CPU.

10

done that too. F14b and F13, no differences. 

I think i should just buy a new board.

11

Have you tried with the GPU in it's two different BIOS states?

12

yeah.... that dip switch was it seems on backup bios.

I feel kinda stupid now that i did not try that. :) thank you :O

13

So its working now?

14

yup 16x PCI-E it reports back now.. :)