Mantle slower than DX11 at 4K in quadfire

[Kaapstad]

Just found this review for a couple of 295X2 in quadfire @4K

The first thing I need to say is I don't agree with their figures as I have found both Mantle and DX11 about even @4K and both of them maxed out even with stock cards manage well over 100fps average. I personally don't like using Mantle @4K settings as it is quite glitchy but I need to test properly on a 4K monitor next month.

Remember I don't agree with what H have found but it does ask some questions.

http://hardocp.com/article/2014/04/29/amd_radeon_r9_295x2_crossfire_video_card_review/4#.U2CgyGcU_Yc

 

[Freddie1980]

Drivers for 4 video cards running at 4k probably haven't had the attention that a more mainstream setup would be receiving most likely.

 

[Gregster]

Surprising results. I run my CPU at stock and get very good scaling at 4K on both Titans but needed to run a 4.6Ghz CPU clock to allow both Titans to scale well at 1080P. I didn't expect to see Mantle being beaten still and was expecting a slight lead for Mantle, even at 4K.

 

[4737Joker]

Have they fixed the memory usage yet? Might have something to do with it.

Do you find it maxes out the the VRAM using 4k settings on mantle kaap?

 

[LtMatt]

Just found this review for a couple of 295X2 in quadfire @4K

The first thing I need to say is I don't agree with their figures as I have found both Mantle and DX11 about even @4K and both of them maxed out even with stock cards manage well over 100fps average. I personally don't like using Mantle @4K settings as it is quite glitchy but I need to test properly on a 4K monitor next month.

Remember I don't agree with what H have found but it does ask some questions.

http://hardocp.com/article/2014/04/29/amd_radeon_r9_295x2_crossfire_video_card_review/4#.U2CgyGcU_Yc

Looks like there is some scaling issues at 4k for quad gpu on Mantle in BF4. I wonder if you got better scaling (on DX) Kaap as your cpu was overclocked? To be honest BF4 is in a bad state atm and desperately needs a patch. Its been almost a month since the last patch. I've stopped playing for now until they fix some of the issues.

 

[Kaapstad]

Have they fixed the memory usage yet? Might have something to do with it.

Do you find it maxes out the the VRAM using 4k settings on mantle kaap?

No it only uses just over 3gb maxed.


Both DX11 and Mantle both average about 120fps maxed @4K, DX11 has a bigger difference between high and low. Mantle as expected stays more around the average.

 

[Kaapstad]

Looks like there is some scaling issues at 4k for quad gpu on Mantle in BF4. I wonder if you got better scaling (on DX) Kaap as your cpu was overclocked? To be honest BF4 is in a bad state atm and desperately needs a patch. Its been almost a month since the last patch. I've stopped playing for now until they fix some of the issues.

I don't need to overclock when running DX11 @4K, I just run the CPU @4.0ghz.

At lower settings overclocking is needed though.