first crossfire rig need some help

[Kadein13]

i have my msi r9 270x 4gbin crossfire and in vally benchmark im only getting a boost of 10 fps. shouldnt i be getting more? im only running at 1080. is there some setting (aside from overclocking) that im missing?

 

[Karen Lynn]

What is it in crossfire with?

Which driver do you have right now?

[guyf2010]

Be sure to check CCC>Information>Hardware to make sure both cards are showing up correctly and that the second says "Linked Adapter". It may also be worth mentioning that Crossfire doesn't work in windowed or borderless modes. The program has to be fullscreen.

[sgloux3470]

Run it in full screen.

 

Make sure you uninstall your drivers and reinstall with the second card installed. (Use display driver uninstaller to do this.)

 

 

 

 

 

[dragoon20005]

also what mobo are you using?

 

CF with a PCI-E X16 slot and a PCI-E X4 slot will not improve graphics performance 

[Kadein13]

im using the updated drivers and mobo is a asrock extream 3 990fx. but i havent tryed installing the drivers with both cards in yet.

[dragoon20005]

im using the updated drivers and mobo is a asrock extream 3 990fx. but i havent tryed installing the drivers with both cards in yet.

did you use PCI-E slot 2 and 3?

 

install the driver with one GPU

 

test OK 

 

then install the second GPU and let the driver detect the 2nd GPU and it will install the correct driver

[Kadein13]

thats what i did

[Karen Lynn]

Do keep in mind that SLI/Crossfire with two cards doesn't mean doubling the frame rate. Also, compare the minimum you were getting.

As dragoon said, make sure you're using PCIe 2 and 3, not slot 4.

[guyf2010]

also what mobo are you using?

 

CF with a PCI-E X16 slot and a PCI-E X4 slot will not improve graphics performance 

I'd like to see some evidence of that. I doubt it very much.

[Kadein13]

im not trying to double my fps but i expected to at least hit the 80 range instead of 65 at bestand guy2010 linus has a video on that

[CalebTheEternal]

also what mobo are you using?

 

CF with a PCI-E X16 slot and a PCI-E X4 slot will not improve graphics performance 

You will still get a performance boost, just very little. I was thinking about getting a third GTX 970 but remember that I would have 2 of them running 4x and one on 8x so not really worth the extra $350. But like he said go to the BIOS and see if they are running x8 and x8, if not that is your problem. It wont double your FPS, but you should be getting more than a 10 FPS boost, but you said it was in Valley engine, so that might be why. How much FPS boost do you get in games? When I do 3D Mark test I only get ~10-20 FPS boost with SLI enabled. Try it on a game and see if you get more of a boost.