Rx 480 4gb crossfire problems

[soffver]

Hi, i have two rx 480 4gb cards in crossfire.

When i play battlefield 1 on Dx11, both GPUs usage is jumping from 0% to 100% all the time... in 2 sec it jump like 3 or 4 times from max usage to zero.

But when i turn crossfire off, the one GPU that im using stays at above 90% usage all the time. Does anyone know the problem here? am i able to play with crossfire with both GPUs att a highe usage %?

[KillerGamingBro]

Whats your PSU?

[PineappleHolidays]

Is FPS variable ?

Are you getting ~1,6x the fps when playing ?

If so then don't worry, afterburner was weird when I had 2 R9 290's also.

 

Remember to make sure both cards are in a 16x slot, and that they have sufficient power (not sharing the same 8pin from the psu)

 

Also check to make sure you don't have vsync or a power limit set for the gpu's, and make sure they aren't too hot

[soffver]

17 minutes ago, KillerGamingBro said:

Whats your PSU?

i have a evga supernova 750b1 (750W)

[PineappleHolidays]

1 minute ago, soffver said:

i have a evga supernova 750b1 (750W)

What are your other specs ?

[soffver]

2 minutes ago, Mihemine said:

Is FPS variable ?

Are you getting ~1,6x the fps when playing ?

If so then don't worry, afterburner was weird when I had 2 R9 290's also.

 

Remember to make sure both cards are in a 16x slot, and that they have sufficient power (not sharing the same 8pin from the psu)

 

Also check to make sure you don't have vsync or a power limit set for the gpu's, and make sure they aren't too hot

the fps i less stable when i do crossfire than 1 gpu.

 

crossfire= fps jumping between 60 and 100 fps

1 gpu= stable 90-100 fps

 

vsync is off, how do i check Power limit on the gpu's? the temp is around 65-70 Celcius when gaming.

[soffver]

4 minutes ago, Mihemine said:

What are your other specs ?

2x rx 480 4gb

hyperX ddr4 2x4gb 2400MHz

i7-6700K  @ 4.0GHZ

240GB SSD (battlefield is located on the ssd)

evga supernova 750b (750W)

[soffver]

also when i do crossfire, i get glitches in-game, like the ground is flickering, and sometimes when i tab in and out, the screen goes black.

[PineappleHolidays]

2 minutes ago, soffver said:

2x rx 480 4gb

hyperX ddr4 2x4gb 2400MHz

i7-6700K  @ 4.0GHZ

240GB SSD (battlefield is located on the ssd)

evga supernova 750b (7502W)

I would highly recommend going through this https://support.amd.com/en-us/kb-articles/Pages/How-to-Configure-AMD-CrossFire-Using-AMD-Radeon-Settings.aspx

and checking the customize crossfire modes, and see what works for BF1

 

Are both gpu's confirmed working ? IE do both work when alone or have you only tested the top one ?

[soffver]

Just now, Mihemine said:

I would highly recommend going through this https://support.amd.com/en-us/kb-articles/Pages/How-to-Configure-AMD-CrossFire-Using-AMD-Radeon-Settings.aspx

and checking the customize crossfire modes, and see what works for BF1

iv'e already seen that and have the same settings on my pc.

[PineappleHolidays]

2 minutes ago, soffver said:

iv'e already seen that and have the same settings on my pc.

What mobo are you using ?

[soffver]

Just now, Mihemine said:

What mobo are you using ?

MSI Z170A KRAIT GAMING 3X

[PineappleHolidays]

2 minutes ago, soffver said:

MSI Z170A KRAIT GAMING 3X

Try furmark http://www.ozone3d.net/benchmarks/fur/

And see if the usage % is also variable.

Check both cards individually in the top slot (!) to make sure they both are working

[soffver]

1 minute ago, Mihemine said:

Try furmark http://www.ozone3d.net/benchmarks/fur/

And see if the usage % is also variable.

Check both cards individually in the top slot (!) to make sure they both are working

okey will do that, just FYI the build is brand new, one 2 days old so i think both cards work propperly

[PineappleHolidays]

2 minutes ago, soffver said:

okey will do that, just FYI the build is brand new, one 2 days old so i think both cards work propperly

I had to re-slot both my gpu's because the first time around one was sticking out a tiny bit

[soffver]

9 hours ago, Mihemine said:

I had to re-slot both my gpu's because the first time around one was sticking out a tiny bit

Does it matter what test program i am using? Will i have the same ish results if im using furmark or lets say heaven benchmark?

[soffver]

iv'e tested the GPUs separately and get a steady usage on both cards. but when i use crossfire the usage is jumping.

 

here is the usage while in-game with only one card. (it says GPU2 but it displays wrong name, it's actually GPU1)

https://gyazo.com/2319bade693ae39294a013f8056435c0

 

and here is the usage with crossfire (still, GPU2 is GPU1 and vice versa)

https://gyazo.com/e8af157cc1c176a475dd512b3e95e60e

 

and the usage issue on crossfire is causing fps drops, graphics flickering, and just worse performace overall.

[PineappleHolidays]

On 1/6/2017 at 8:22 PM, soffver said:

iv'e tested the GPUs separately and get a steady usage on both cards. but when i use crossfire the usage is jumping.

 

here is the usage while in-game with only one card. (it says GPU2 but it displays wrong name, it's actually GPU1)

https://gyazo.com/2319bade693ae39294a013f8056435c0

 

and here is the usage with crossfire (still, GPU2 is GPU1 and vice versa)

https://gyazo.com/e8af157cc1c176a475dd512b3e95e60e

 

and the usage issue on crossfire is causing fps drops, graphics flickering, and just worse performace overall.

I get the problem and I'm trying to solve it the same way I solved mine.

In your bios is there an option for PCIE speeds ? (ie "slot 2 gen 3 x8" or something ? )

using gpuz  

 

you can find out if it's 4x 2x or 8x

[ivan134]

On 1/6/2017 at 4:12 AM, soffver said:

okey will do that, just FYI the build is brand new, one 2 days old so i think both cards work propperly

PLEASE FOR THE LOVE OF THE FLYING SPAGHETTI MONSTER, DON'T RUN FURMARK. IGNORE ANYONE WHO EVER TELLS YOU TO DO THAT TO TROUBLESHOOT YOUR COMPUTER.

 

I don't know the solution to the problem you're having, but neither does the person telling to you to run FurMark.

 

[ivan134]

I don't think your power supply is a good one. Wattage isn't everything.

[soffver]

9 hours ago, ivan134 said:

I don't think your power supply is a good one. Wattage isn't everything.

Okey, i have another psu witch is a corsair rm650x. Do you think that will do the job? And also, i havent tried furmark, but i ran the benchmark on heaven and i got the usage results i posted earlier from there.

[ivan134]

4 minutes ago, soffver said:

Okey, i have another psu witch is a corsair rm650x. Do you think that will do the job? And also, i havent tried furmark, but i ran the benchmark on heaven and i got the usage results i posted earlier from there.

Won't hurt to try, but I definitely would not overclock them with only 650 W.

[soffver]

1 minute ago, ivan134 said:

Won't hurt to try, but I definitely would not overclock them with only 650 W.

Yea im not so much into overclocking, but do you think the problem can be the psu? Does the pc dont get enough power to run both cards but only one?

[ivan134]

6 minutes ago, soffver said:

Yea im not so much into overclocking, but do you think the problem can be the psu? Does the pc dont get enough power to run both cards but only one?

Like I said, wattage on the label isn't everything. A bad quality power supply can cause issues like this.

[soffver]

2 minutes ago, ivan134 said:

Like I said, wattage on the label isn't everything. A bad quality power supply can cause issues like this.

Will try the corsair psu then. How do i know if a psu have a good quality? What psu would you recommend IF the corsair does a better job than the evga one? Becuase i kinda need the corsair psu for another build.