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7950 boost running PCIe 2.0 X8!?! - Page 2

post #11 of 18
Thread Starter 
Quote:
Originally Posted by electro2u View Post

Is this on a fresh install of Operating System since you got rid of the other motherboard you were using?

Great question!

I did not do a fresh install. I merely refreshed the OS...which took about as long as a fresh install! Could this be what causing the issue? Would there be a way for me to edit the registry?
post #12 of 18
First I would use display driver uninstaller and get rid of that variable. Then I would install motherboard drivers. Failing that, my next step is to do a fresh install of windows. But I run very light. I know how much of a problem it can be. If you had a spare or alternate storage device you might try installing windows on it to test in case it's a dead end. Personally I don't imagine a reg edit is a possible fix but I could be wrong.
post #13 of 18
Thread Starter 
terrible news...just did a fresh install. Reinstalled all the drivers, including the chipset for the 990fx. It still reads that its running at 2.0 x8 under hardware in catalyst control center.

DMI is still reporting that the motherboard has four PCIe slots in use...seems I have a faulty board.
post #14 of 18
Did you try flashing the bios? Worth a shot maybe
post #15 of 18
Thread Starter 
I have a help request in with GB tech support. Other than that I have tried everything, including a fresh BIOS

I'm starting to feel like this is a glitch! With it being a 3.0 card in a 2.0 slot. HWmonitor show the card running at 3.0 x8, which is 2.0 x16 bandwidth. With the complexity of computers, I can see this little detail being over looked by programers...certainly by the AMD team. I'M STILL WAITING FOR A DOWNSAMPLING SOLUTION!

Sadly this search all came about because of the poor performance issues in BF4. Been chasing my own tail, searching through old benchmarks and noticed a significant drop in performance, roughly 15%. Unoticable in most games because of vsync and overclocking, plus with drivers changing performance + - from release to release, its hard to say whats a consistent bench.
post #16 of 18
Thread Starter 
Had even farther downclocking take place over the weekend. PCIe slot became stuck @ 1.1 x8, limiting bandwidth to 2.5gb/s. Created stutter and and lost about 20% performance.

I reinstaled driver clean and no change. Cleared the CMOS and loaded optimized settings and the PCIe slot returned to original limitation and x8 2.0 @ 5 gb/s.

I'm pretty sure the motherboard is faulty. Been four days and still no response from Gigabyte tech support
post #17 of 18
Seems to me that the board will require an RMA
Dire Wolf
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K @ 4.9Ghz - 1.35v - Delidded Asus Z97 ROG Maximus VII Hero MSI GTX 1080Ti 11GB Gaming X 16GB Corsair Vengeance Pro 2400mhz 
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Samsung SM951 M.2 NVMe - 256GB Samsung 840 EVO - 500GB Noctua NH-D15 Windows 10 Pro 
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IIyama 28" 4K B2888UHSU-B1 Corsair Vengeance K90 - MX Red EVGA Supernova 1300W G2 /w Be Quiet! Pure Wings 2 Corsair Carbide 540 Air 
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Dire Wolf
(17 items)
 
  
CPUMotherboardGraphicsRAM
i7 4790K @ 4.9Ghz - 1.35v - Delidded Asus Z97 ROG Maximus VII Hero MSI GTX 1080Ti 11GB Gaming X 16GB Corsair Vengeance Pro 2400mhz 
Hard DriveHard DriveCoolingOS
Samsung SM951 M.2 NVMe - 256GB Samsung 840 EVO - 500GB Noctua NH-D15 Windows 10 Pro 
MonitorKeyboardPowerCase
IIyama 28" 4K B2888UHSU-B1 Corsair Vengeance K90 - MX Red EVGA Supernova 1300W G2 /w Be Quiet! Pure Wings 2 Corsair Carbide 540 Air 
MouseMouse PadAudioAudio
Mionix Naos 8200 Corsair Extended Mouse Mat Creative Soundblaster Z AKG K702 w/ Antlion ModMic 
Other
Logitech Extreme 3D Pro 
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post #18 of 18
Thread Starter 
Thats what I'm considering also...sigh.

There seems to be a handful of this particular issue around the internet...not one of them was resolved, with the exception of a bad overclock. Mine persists no matter what I do.

Amusing observation, after seeing several GPUz pics around my search, there are several people out there that have no idea this is happening to them.

The oddest part is the bus speed...its not the normal 2, 4 and 8 gb/s....why on earth would it be 5 gb/s thats x10 lanes not x8?
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