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r9 280x Crossfire help

kneggrow
By kneggrow
in Graphics Cards
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My friend just got 2 r9 280X's and the crossfire doesn't seem to work. the catalyst recotnizes both gpus and says that crossfire is working but there is not proformance increase between 1 r9 280x and 2 r9 280x's. on of them is from gigabyte and the other one is from msi. 

PSU: 1000W, 80bronze

CPU: fx- 8350

Ram: 2 sticks of 4gb

Mobo: ASUS M5A99FX PRo

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Posted

Try older drivers...

 

Better thing for me to ask is what drivers is he useing?

CPU Ryzen 5 Asrock B350 Pro 4 / MSI RX580 Gaming / RAM 16 Gigs Corsair Vengeance 3000 / HDD 1TB Seagate Barracuda / SSD Samsung 840 120GB / 500GB Samsung SSD / Case Urban S31 / PSU EVGA G2 750w / Os Windows 10 / Keyboard Corsair K70 / Mouse Razer Naga 2013 (Won it from Linus!!

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Do you have the bridge connected and is the motherboard crossfire compatible? those are the only two things I can really think of off the top of my head

The mobo is crossfire compatible.

 

Yeah make sure the crossfire bridge is fully connected and update the drivers to the latest, non-beta.

.

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Fuck you and your friend for being able to find 280x's :P I've been trying to get one and they are either sold out for inflated price.

Sky Pollution | i5 3570k @4.8Ghz | MSi z77a g45 | MSi GTX 770 Gaming 2gb | Samsung 840 Evo 250gb, Samsung OEM 500gb HDD | Corsair CX750m | Corsair 760t White Edition |
Corsair M95 | SuperLux 668b's | Logitech C615 | ViewSonic VX2250wm | Random OEM keyboard until I rage break it and grab another random OEM keyboard from my pile.
Build Log: http://linustechtips.com/main/topic/186413-sky-pollution-my-white-760t-build-rebuildupgrade/

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CFX only works in fullscreen if I remember correctly.

My rig: CPU: Intel core i5 4670K MoBo: MSI Z87-G45 Gaming RAM: Kingston HyperX Beast 2x4GB 1600mhz CL9 GPU: EVGA GTX780 SC ACX SSD: ADATA Premier Pro SP900 256GBHDD: Western Digital RED 2TB PSU: FSP Aurum CM 750W Case: Cooler Master HAF XM OS: Windows 8 Pro

My Build log, the Snowbird (heavy WIP): http://linustechtips.com/main/topic/188011-snowbird-by-lachy/?hl=snowbird

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