[SOLVED] ASUS P8Z77-V Deluxe - Single VGA doesn't work

[Tutoh1]

Hi guys,
I purchased a ASUS P8Z77-V Deluxe motherboard second-hand, had some socket pin issues, fixed them as best I could and then put a i7-2600 in it. When I found that none of my graphics cards were working in the single VGA slot (PCIEX16_1 slot) , I asked the original owner where his graphics card was and he said it was in the 1st SLI/Crosfire slot (PCIEX16_2 slot). My R7 260x is now working fine in that slot as well.
Is there a configuration where the graphics card will work in PCIEX16_1? The manual mentions something about "Single VGA mode" and "pcie operating mode" but it seems to suggest the motherboard automatically detects when GPUs are in PCIEX16_1, 2 or 3.

 

[Colif]

i don't see anything in bios about enabling that slot,
there are choices to change igpu settings
choice to change primary display between igpu & gpu

there is an option to change speed of 16_2 but you don't want it, as auto runs it at 16 and the other choice is 1x
i linked manual to the number, have a look. Its not a normal thing to be able to disable that slot, its possible its damaged?

 

[Tutoh1]

i don't see anything in bios about enabling that slot,
there are choices to change igpu settings
choice to change primary display between igpu & gpu

there is an option to change speed of 16_2 but you don't want it, as auto runs it at 16 and the other choice is 1x
i linked manual to the number, have a look. Its not a normal thing to be able to disable that slot, its possible its damaged?

That isn't for x16_2. That is for x1_2, like for a PCIe sound card.
Maybe it is damaged...

 

[Colif]

One thing I found is check CPU for bent pins

not same board - https://rog.asus.com/forum/showthre...t-does-not-detect-GPU-GPU-Debug-LED-glows-RED

That isn't for x16_2. That is for x1_2, like for a PCIe sound card.

ah, so it is. Sorry about that.

 

[SkyNetRising]

I purchased a ASUS P8Z77-V Deluxe motherboard second-hand, had some socket pin issues, fixed them as best I could and then put a i7-2600 in it.
When I found that none of my graphics cards were working in the single VGA slot (PCIEX16_1 slot)

Probably because of bent cpu socket pins.
Can you show a photo of cpu socket? (upload to imgur.com and post link)

 

[Tutoh1]

There are definitely bent pins on the cpu socket. I spent 3 hours doing my best to straighten them and I was amazed when the board actually booted up. So this must be another causality.
Everything else is working fine.

 

[SkyNetRising]

First PCIE x16 slot is directly connected to cpu.
If pins responsible for this connection are bent, then slot will not work.

 

[Tutoh1]

First PCIE x16 slot is directly connected to cpu.
If pins responsible for this connection are bent, then slot will not work.

Does this mean that PCIEX16_2 is not as faster as PCIEX16_1 because it is not directly connected?

 

[SkyNetRising]

Does this mean that PCIEX16_2 is not as faster as PCIEX16_1 because it is not directly connected?

PCIEX16_1 and PCIEX16_2 - both are cpu connected. PCIEX16_2 will operate at x8 mode though.
PCIEX16_3 is chipset connected.

 

[Tutoh1]

In this video, a GTX 1650 was placed into the x4 then the x16 PCIe slots in a Optiplex 9020. The difference in benchmarks was 78.9fps vs 86.9 fps.
So the performance loss from x8 is going to be insignificant. 3 fps out of 80 fps.