install help 2x radeon r9 280 crossfire,

sauronjag · May 4, 2017

https://pastebin.com/CVFqnPiS - dxdiag

trying to install 2x radeon r9 280. I have an adequate PSU, supply going to each card. in appropriate slots on mb according to manual for dual cards (position 1 and 3). crossfire attachment applied to the goldfingers between the cards. i had reinstalled graphics drivers for amd radeon r9 280 from AMD site. when I look at device manager, only 1 radeon r9 280 appears under display adapters.

is this correct? idk how to check to see if both cards are operating as crossfire.

I was reading with the new radeon software that crossfire is selected by default if possible but was having trouble finding a definite source. in any case, I cannot find an option to select or deselect crossfire in their software

thx

hang-the-9 · May 5, 2017

That link has a ton of information, only thing we need to know is the motherboard brand and model. Did you test the cards one at a time? What is the power supply brand and model?

sauronjag · May 5, 2017

hang-the-9 :

AMD Graphics Card
HSI radeon R9 280 and Sapphire Radeon R9 280 3G DDR5 PCIE

Operating System
Windows 10 64bit

Driver version installed
Radeon Software Crimson Edition 16.6

Display Devices
BenQ RL2455 , HDMI
VW246, VGA

Motherboard
Asus Sabertooth 990FX R2.0

CPU/APU
AMD FX-8120 8core

Power Supply Unit Make, Model & Wattage
EVGA SuperNOVA 850 G2, 850w

RAM
32gb

=========
Ya i tested one at a time, in the primary pci-e slot as solo cards, they both work fine. Also used both cables to make sure they aren't the culprit.

hang-the-9 · May 5, 2017

OK so you don't have two 280 cards you have a 280X and a 280, it may not work that way http://www.tomshardware.com/answers/id-2815719/280x-280-crossfire.html

Check with AMD support.

maxalge · May 5, 2017

sauronjag :

hang-the-9 :

AMD Graphics Card
AMD R9 280X and Sapphire Radeon R9 280 3G DDR5 PCIE

Operating System
Windows 10 64bit

Driver version installed
Radeon Software Crimson Edition 16.6

Display Devices
BenQ RL2455 , HDMI
VW246, VGA

Motherboard
Asus Sabertooth 990FX R2.0

CPU/APU
AMD FX-8120 8core

Power Supply Unit Make, Model & Wattage
EVGA SuperNOVA 850 G2, 850w

RAM
32gb

=========
Ya i tested one at a time, in the primary pci-e slot as solo cards, they both work fine. Also used both cables to make sure they aren't the culprit.

keep the 280x, sell the 280

your cpu is not good enough too keep up with CF, wasted time and cash

save the money for a new rebuild

sauronjag · May 5, 2017

Sorry for confusion. Both cards are actually radeon r9 280. They are just different manufacturers (one is HSI and one is Sapphire). Updated the specs in above post.

Still not having any luck with computer recognizing both cards as crossfire. AFAIK device manager only sees one. Radeon software only lists one also

amdrx480 · May 5, 2017

Is the pci slot locked ?
sounds like you graphics card is not taken.

sauronjag · May 5, 2017

Sorry what do you mean by locked? I'm a hardware dolt.

amdrx480 · May 5, 2017

you see a lock on the side of pci slot. when graphics card is inserted it locks. most of the time it doesn't work so you have to do it after inserting the card. Y

sauronjag · May 6, 2017

Thx. Both are locked and have also interchanged. No fix

madmatt30 · May 6, 2017

https://www.techpowerup.com/gpuz/

Gpu-z will let you know if crossfire is enabled & also if more than 1 card is being picked up

See the ati crossfire box at the bottom??

Also the clickable box absolutely bottom left if selected should show 2 seperate cards that you can select to show details in the main tabs.

However it does sound that from device manager you only have one card showing.

sauronjag · May 6, 2017

madmatt30 :

Only 1 card showing. Crossfire disabled

madmatt30 · May 6, 2017

What slots are you using for the cards mate ??

sauronjag · May 6, 2017

Pci-e 1 and 3,which is what the motherboard manual recommended. They are both x16 slots

madmatt30 · May 6, 2017

Absolutely right mate

Have you tried a single card in slot 3 ??

sauronjag · May 6, 2017

Just tried it. No display. The vga led red light is on, I get error beeps (1 long, 3 short). The computer is in and running but no display.

The motherboard manual does say to only use the pci-e slot 1 with a single card though.

madmatt30 · May 6, 2017

I know what it says but that is a recommendation for best bandwidth on the pci express slots.

You should get a display from ANY of the slots on the board mate.
It would seem that PCI express slot is borked.

sauronjag · May 6, 2017

Thx for help. Contacted motherboard company, sending in for rma. They agreed. Looking forward to new board

install help 2x radeon r9 280 crossfire,

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