PCI express 3 won't detect new GPU

mr_enex

Reputable
Feb 2, 2016
1
0
4,510
SITREP as follows:

Situation:

AsRockZ77 PRO VGA LGA 115 (as viewed on sellers webpage) ) http://i1144.photobucket.com/albums/o492/zemljaje11/yap_zps2f6a75c2.jpg )

AMD R9 380 (brand new card)

AMD HD 8750 (older card, fried)

amd hd 4850 512 gddr3 (oldest still functional)

( http://i1144.photobucket.com/albums/o492/zemljaje11/owyeah_zps37016307.jpg )

Activity:

Upon seating new 380 GPU to replace hd8750 that served me well
on the PCI express 3 unit does not get detected in BIOS.
I set specifically in BIOS north bridge, slot to Express 3,
but did not work.

I realized it could be GPU problem or slot problem.So I inserted 380 GPU on
PCI 2 slot, and it worked and it works as I'm typing as it should.I diagnosed that
GPU is in working order.

Next was PCI express 3 slot.I have put hd 4850 into it and it worked with few
interesting things.It boots properly displays MOBA manufacturer logo
and right after that I can witness blue square on the center with black edge.
After a few seconds of that it goes into login screen.Noticed that screen is
not full sized it has black edges (and has low display resolution something
like 1311x789, forgot the number)

So I'm really intrigued as to why that is.Anyone with more knowledge than me
on this topic?