PCI-E lanes trouble :/

[BenDroid]

So i bought an asus p8z77-v lx2 and two 7770.

After installing them, putting them in crossfire and my 3570k gpu-z showed that my 1. 7770 is running on 16x and the 2. one was running on 4x lanes.

I tried flashing all the bioses, took the card, out checked everything and put them back in, still nothing.

Can onyone say what is going on here?

[CoolBeans]

Well that motherboard doesn't support crossfire

[CoolBeans]

The lane that you put the 2nd GPU in is PCI-E 2 not 3

[Wats]

that is all that board can do. return it and say you ordered the wrong item or something. wish ya luck

[fishymamba]

It does support crossfire. Do you have any other devices in the PCIe slots?

 

BTW that GPU should run fine at 4x since it is not really a super powerful card. 

[WoodenMarker]

The 7770 isn't that powerful and you'll be fine.

If you can, you should return the 7770's for a 7850/7870 for much better performance and easier overclocking..

[BenDroid]

On the moherboard box it says it is crossfirex ready...
and after a resart, the second gpu has in gpu-z apparently only a 32-bit memory bus and such shit...

aaah anyway, i'll show ya:

[DyGr00339]

It is a bug in the system sir

[R4STABAN]

That's the maximum your board can do

 

From the specs:

 

Expansion Slots 1 x PCIe 3.0/2.0 x16 (blue) *¹
1 x PCIe 2.0 x16 (x4 mode, black)
2 x PCIe 2.0 x1
2 x PCI

[BenDroid]

and no i dont have any other pcie devices installed

i mean lower memory bus width, higher pixel- and texture-fillrate on the 4x running one even the clocks are different, wtf?