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R9 280X Tri-X BIG Crossfire problem

1K views 54 replies 5 participants last post by  Ragsters 
#1 ·
I finaly put my PC together last week.
First thing, on boot it says every time new PCU instaled, i have to configure it so i turn this off in the BIOS menu.
Second thing, after instaling both 280x i activated the Crossfire in the menu and try to run some Benchmarks/Unigine,3dMark, Assetto Corsa benchmark and it was great.
But after i turn down mz PC, the next time he does not recognize the top card so i need to plug my monitor in the 2nd one and the top is not in the BIOS and for the 2nd one he shows the PCI-e slot works only at 8x
in the device manager i have this



And the Crossfire option dont show up.

After another turning off (i need to say the PC must stay off for a while or it behave normal) i have no picture from the 2nd card so i need to swap the cable again to the top card and everything is fine, then i have the crossfire again

PLS HELP, if i dont get it runing till next week im going for GeForce again. This was my first ATI
 
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#2 ·
Hi there,

that issue is a bit weird, looks like your OS is not reading your second card, Although I do have a question, do you have installed the crossfire bridge?

Because I was looking to your other post and saw a picture you uploaded and I didn't see the bridge installed. Im not sure if that's why you are having the problem, but as far as I know only the R9 390 and R9 390x or 290 / 290x are the cards that do not need the bridge.
 
#4 ·
Wait, you only need 1 bridge, not the 2 of them, you only use the 2 of them if you are doing 3 or 4 GPUs xfire.

If you dont mind on telling us, what's your system specs? Also what is your GPU Driver?

Just wondering, have you tried to use 1 GPU at the time without the second one installed, and see if your OS can read it without any problem? Or changing different PCIe lanes?
 
#5 ·
i use only one Bridge.

My spec:
i7 4790k (every time i boot it says New CPU installed, press F1 to setup !? i dissabled this in the BIOS)
Corsair Dominator Platinum 2x8Gb 1600MHz (BIOS Shows only 1333 !?)
Asus Maximus VII Formula
2x R9 280x Tri-X OC
SanDisk 240Gb SSD
WD 3TB HDD
Corsair RM850 PSU
NZXT Kraken X61

GPU Driver : 15.201.1151.1005-151012a-295347E-ATI

I will try to use only one card , i cant swap PCIe lanes, the 3th lane runs only on 4x and on the Asus homepage they say in Dual Crossfire to use only the top 2
 
#6 ·
Ohh I got you,
Quote:
Originally Posted by theDropac View Post

I will try to use only one card , i cant swap PCIe lanes, the 3th lane runs only on 4x and on the Asus homepage they say in Dual Crossfire to use only the top 2
Remember that the idea is to see if you OS can recognize without any problem both cards, but using one at the time. Also Im missing your Windows version
rolleyes.gif


You can use an AMD GPU with PCIe x4 lane, the thing is that they advise you to use the other one because it's configured to work @ x8 so you dont bottleneck the card.

Regarding the memory RAM we need to configure that one too, open the Bios Check under the Extreme Tweaker tab in the advanced mode section of the bios. In the Ai Overclock Tuner, change from Auto to X.M.P, this will allow you to have the ram at the rated speed.

keep us posted
 
#7 ·
The XMP is activated, in Device Manager it says for the top card not able to run.
i use a Win 7 SP1 Home edition

The funny thing it hapens when the PC stays off for longer time, like before i go to work its all fine , after work the top dont show up, next day its all fine again, come back from work just one card is going
i try one card at the time in every lane
 
#11 ·
Okay I think im begining to understand the way you are doing the benchmarks.

I do have some more question,

Do you have all your monitor cables connected to the GPU on top?

Can you do a validation using CPU-Z so I can see all your specs? because you told me that your OS is Win 7 SP1 Home edition and as far as I know there are 2 Home editions one is limited to 8GB while the other is limited to 16Gb.

Also there is another thing we could try, Unistall all your display drivers using Display Driver Uninstaller and download the new drivers those are for 64bit, but Im not sure if you have Win7 64bit.

Im trying to keep it clear, because maybe someone can join the thread and also be more helpful.
 
#12 ·
Im subbing to this because im having a similar problem with my dual 7970s.
 
#13 ·
Quote:
Originally Posted by Ragsters View Post

Im subbing to this because im having a similar problem with my dual 7970s.
thumb.gif
Alright I will do my best to help you too hahaha.

Just wondering, do you have the same thing that the second GPU is not getting detected by the OS? Im trying to find out if there is something on the OS that's making that issue, not the mobo or the GPU.
 
#14 ·
I tried DVI,VGA and HDMI on both cards, in single mode each one in every slot and both at the same time.
I have a legal new Win 7 64bit Home Premium only installed on this PC and a separate Win 7 for my Laptop

The other GPU work in all situations (single or dual in all slots)
 
#15 ·
Alright I understand, but remember I need you to give me those things I asked you, if you dont mind
rolleyes.gif


There is something i read that got me curious, maybe your drivers are okay, but the mobo is reading your second GPU as PCIe x1, if this is true, then your xfire setup will be disable, because they need to run @ x4 minimum.

But in order to get there we need to do those test, and see.

One more thing I need, is to see using GPU-Z if you can see both cards and what speed they show.

if you can show pictures that would be great.

By the way, you guys share the same OS so that's something im looking for
 
#18 ·
Any luck?
 
#20 ·
Quote:
Originally Posted by theDropac View Post

No,after another try in my friends pc i send the one back. They give me a new one
I'm currently working on trouble shooting my problem.
 
#21 ·
Quote:
Originally Posted by theDropac View Post

No,after another try in my friends pc i send the one back. They give me a new one
Wait so you ended replacing the GPU?
Quote:
Originally Posted by Ragsters View Post

I'm currently working on trouble shooting my problem.
I see, the thing is that you should do the same steps like I asked theDropac to do. and well start talking to solve that
tongue.gif
 
#23 ·
Quote:
Originally Posted by theDropac View Post

im waiting for the new one but yes
hahaha not fair
tongue.gif


Nah! I hope for the best! until then keep me posted, if you keep having the same problem just shoot and ask, to tackle that. in the meantime I will wait for Ragsters since you guys have almost the same setup. at least with same mobo MFG and windows
 
#24 ·
Quote:
Originally Posted by josepi View Post

hahaha not fair
tongue.gif


Nah! I hope for the best! until then keep me posted, if you keep having the same problem just shoot and ask, to tackle that. in the meantime I will wait for Ragsters since you guys have almost the same setup. at least with same mobo MFG and windows
Yeah so I wen to best buy and bought a AMD r7 360 so I could use to test the board. Now Im not getting any display. How unlucky would I be if the new GPU I got was defective?
 
#25 ·
Quote:
Originally Posted by Ragsters View Post

Yeah so I wen to best buy and bought a AMD r7 360 so I could use to test the board. Now Im not getting any display. How unlucky would I be if the new GPU I got was defective?
wow, i dont think you have a DOA gpu, but those things happens, did you testedthe gpu using otherspcie lanes?
 
#26 ·
Yes. I used top two. I wonder if it has anything to do with my monitor that only excepts dvi-d gpu cards.
 
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