Crossfire 4870's on a msi 890fxa-gd70

[urmysl00t]

Hello, i just purchased a msi 890fxa-gd70 and some gskill ddr3 to go with my 2 sapphire 4870 1gb and phenom2 965. i cannot seem to get the video cards to do full link bandwidth (16x)

 

[urmysl00t]

eh didn't let me me finish, anyways ive tried every configuration known to man, even some more odd ones and i just cant seem to get it to to go over 8x on the main and 8x on the secondary video card. and they advertise this board to do 16x in 2 different
pci express slots at the same time

 

[CyborgCop]

I've had the board since beginning of September and haven't figured it out either.. Ack, it's annoying.

 

[OvrClkr]

How do you guys know that the cards are not running at full 16x? Did you open up GPU-Z and see both of them running at 8x? Did you make sure that you are using the first two slots and not the first and third slots?

 

[CyborgCop]

How do you guys know that the cards are not running at full 16x? Did you open up GPU-Z and see both of them running at 8x? Did you make sure that you are using the first two slots and not the first and third slots?

I'm not running crossfire but having the same problem.

 

[OvrClkr]

Can you or the OP post a GPU-Z screen-shot like this one?

http://i683.photobucket.com/albums/vv199/OvrClkr/jc2_stock-1.png

 

[urmysl00t]

here they are
http://i302.photobucket.com/albums/nn88/urmysl00t/gpuz1.gif
http://i302.photobucket.com/albums/nn88/urmysl00t/gpuz2.gif

 

[OvrClkr]

here they are
http://i302.photobucket.com/albums/nn88/urmysl00t/gpuz1.gif
http://i302.photobucket.com/albums/nn88/urmysl00t/gpuz2.gif

What operating system are you using? Looks like XP, if so that me be your problem since the board's Bios revision was released after Win7. Have you tried updating the Bios since you purchased the board?

 

[urmysl00t]

no, its win 7 64. i turn aero off. and i haven't updated recently, but i did as soon as i purchased the board

 

[OvrClkr]

That's weird, have you tried re-seating the card?

 

[urmysl00t]

yea, the only way i could get it to go 16x, was pull a card.

 

[CyborgCop]

http://i868.photobucket.com/albums/ab243/CyborgCop/gpuz.png

 

[OvrClkr]

Not positive but I think I found the reason why you guys are having a hard time getting both cards to do full 61x.

- PCI_E1·supports up to PCIE x16 speed (when PCI_E3 is empty)·
- PCI_E5·supports up to PCIE x16 speed (when PCI_E6 is empty)
- If you want to install two·graphics cards, please use PCI_E1 & PCI_E5 slots
- PCI_E3 & PCI_E6 support up to PCIE x8 speed

http://lanoc.org/review/hardware/motherboards/4383-msi-890fxa-gd70