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pci-e lanes troubles

phantom_jo

Well-known member
Joined
Jan 12, 2009
Messages
50
Location
Surabaya, East Java
hi guys, i hope i'm posting in the correct section.
I have a MSI DKA790GX, it is advertised to have x8 speeds at crossfire
but according to cpuz and ccc it is only running at x4 + x8
on slot 1 i have 4870 and slot 2 i have 4850, i have tried disabling crossfire and it still reports x4 x8
any advice on how to fix this?
 

SKYMTL

HardwareCanuck Review Editor
Staff member
Joined
Feb 26, 2007
Messages
13,410
Location
Montreal
Does this motherboard have a jumper between the PCI-E slots to manually change their configuration?
 

Soultribunal

Moderator
Staff member
Joined
Dec 8, 2008
Messages
8,282
Location
Mississauga
Is there by some chance a setting in the BIOS to make the Lanes Full speed?
I'm not familiar with an MSI Bios, but I know when I first put the RAM in my folding RIg, it had to be setup in BIOS to run full speed.

Just a thought at least.
ST
 

phantom_jo

Well-known member
Joined
Jan 12, 2009
Messages
50
Location
Surabaya, East Java
new update:
it seems this problem only occurs with my 4870, with my 4850 lane is x16.
also with 4870 installed, the onboard video pops up in both cpuz and ccc. as i recall onboard video should've shut itself down when the motherboard detects pci-e display adapters.
i tried reinstalling the ati drivers but still no change.
what do you guys think? vista 64 being screwy and needing a reformat, or is it the bios of the mobo, or maybe the 4870 is a fud(although it plays really well, no stutter whatsoever).
 

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