BF4 worse lag with Mantle API?

modernwar99 · Nov 30, 2014

I was playing around with mantle in BF4 and I when I enabled the frame time graph in-game, my frame time and input lag were higher with mantle than dx11. I have an obvious CPU bottleneck (Phenom II x4 and R9 280x) and it bothers me why I get high er frame time and lower fps with mantle. The lines on the graph for dx11 are also flatter and smoother than with mantle. Isn't mantle supposed to fix CPU bottlenecks, not make them worse?

i7Baby · Nov 30, 2014

Enabling the graphing adds a small load.

modernwar99 · Nov 30, 2014

The graph is enabled whether it's mantle or dx11. My proble, is Mantle when compared to dx11, is causing bad fps and frame time.

i7Baby · Nov 30, 2014

Maybe BF4 is optimised for DX rather than Mantle.

blacksheep123 · Nov 30, 2014

i7Baby :

bf4 was the first game to suppoet mantle

blacksheep123 · Nov 30, 2014

what dirver version are you on..?

what is your ram size?

is your cpu overclocked?

Mousemonkey · Nov 30, 2014

i7Baby :

blacksheep123 :

Perhaps i7Baby should try googling it.

renz496 · Nov 30, 2014

i7Baby :

being the first title to showcase the true benefit of Mantle i don't think that's the case. but if anything it also shows how developer handles things that usually done by AMD or nvidia.

renz496 · Nov 30, 2014

modernwar99 :

have youu check your VRAM usage for Mantle and DX11? i heard that Mantle version of the game use more VRAM than DirectX counterpart. and in some cases i heard it cause performance problem with mantle

modernwar99 · Nov 30, 2014

VRAM usage on paracel storm: 2.7-2.9GB
RAM usage on paracel storm: 2.9GB..............total system usage 5.65GB out of 6GB installed.

renz496 · Nov 30, 2014

is that Mantle vs DirectX usage?

modernwar99 · Nov 30, 2014

That was mantle, dx11 uses about 2.4-2.5GB VRAM, system RAM usage was about the same with both. CPU usage with both is 95-100% and GPU usage decreases with mantle (Mantle: 80%, dx11: 85%)

blacksheep123 · Nov 30, 2014

update your drivers to 14.11.2 .. you are probably running on old unfinished mantle drivers

i7Baby · Nov 30, 2014

Last year it looked like BF4 still slightly favoured nVidia cards - http://www.tomshardware.com/answers/id-1716411/amd-nvidia-battlefield.html

But there's nothing obvious - http://www.overclock3d.net/reviews/software/battlefield_4_performance_amd_vs_nvidia/1

Post your complete and detailed build.

modernwar99 · Nov 30, 2014

CPU: Phenom II x4 840T (all 6 cores unlocked)
MOBO: Asus M5A78L-M
GPU: Sapphire R9 280x Dual-X
RAM: Micron Tech 6GB (3x2GB sticks) 1333MHz
PSU: XFX TS 550 watt
HDD: Seagate Barracuda 1TB 5600RPM

modernwar99 · Nov 30, 2014

I don't currently have access to that computer, I installed BF4 on my new computer and the same thing happened with my R9 280. Also something weird is I brought out my old GTX 770 and was able to play around with it for maybe 10 min before it overheated (watercooler is broken) and with dx11 I get about the same PC as with my R9 280. This PC's specs:

CPU: i3 4160 @ 3.7GHz
MOBO: ASRock H97 Pro4
GPU: Powercolor R9 280 Turbo-Duo
RAM: Team Blue 8GB (2x4GB sticks) 1600MHz
PSU: XFX TS 550 watt
HDD: Seagate Barracuda 1TB 7200RPM

The CPU overhead is the same with or without mantle. On this PC I have the AMD beta drivers.

i7Baby · Nov 30, 2014

What does "I get about the same PC as with my R9 280" mean?

modernwar99 · Nov 30, 2014

Not PC, I meant FPS.

i7Baby · Nov 30, 2014

Your PC (no.1) mobo - http://www.asus.com/au/Motherboards/M5A78LMUSB3/specifications/ - is dual channel. You can have 2 x 2gb but not 3 x 2gb. Else you will get problems

Are we only talking about PC no.2? Why post 2 builds?

modernwar99 · Nov 30, 2014

The problem happens on both of them, trying to make connections on why this is happening with mantle supported cards.

i7Baby · Nov 30, 2014

Indications are that DX/Mantle shouldn't make a noticeable difference.

Are you testing using that same scene each time?

What cards have you used Mantle with and DX11 with and what avg fps for each?

This info needs to come from the one PC with same internet connection etc. each time.

renz496 · Dec 1, 2014

i try looking around it seems that with mantle the game is having memory leak causing the game to stutter. but it seems the game itself was problematic in general. and i found something like this:

http://www.reddit.com/r/battlefield_4/comments/2exm2q/finally_mantle_cpu_spike_stutter_fix/

i7Baby · Dec 1, 2014

I'm again glad I'm running nVidia cards.

Johnabie · Dec 1, 2014

BF4 November update caused bad frame pacing and rubberish banding when Mantle is activated. When the November patch came out I had to turn off mantle.

blacksheep123 · Dec 1, 2014

bf4 is slightly broken game just like assassins creed unity..

amd effed up with battlefeild 4..it was a amd evolved title

nvidia effed up with watchdogs,assassins unity ..it was optimised by them

some times developers dont take their jobs seriously and the card manufacturers get the blame while they make money

BF4 worse lag with Mantle API?

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