with D300 for mobile dev?

[anonymous_user_6888603d]

@jpine;107631

Just so I understand correctly, your nMP 6 core with the D500 cards is performing about the same under Bootcamp as it is under Mac OS when running the Elemental Demo?

I tested 10.9.4 vs. Windows 8.1, both using our OpenGL 3 era render path (as presently that’s all we support on OS X). The performance was very similar - not absolutely identical, but very close. Both end up running ‘UE4Editor.app/exe ElementalDemo -game -opengl’ with a frame rate between 15-45fps. The 4.4 releases should be a bit closer still. Using Apple’s MTGL can help in ElementalDemo -game on OS X too and can be enabled with the -openglUseMacMTEngine command line option. Unfortunately this isn’t working in all circumstances as of 4.4 so isn’t the default.

@jpine;107631

If so, did was CrossfireX enabled under Window 8?

No, this was tested against OpenGL on Windows, using only the single D500 which outputs to screens. The offscreen/compute-only D500 was not used.
The Mac has no equivalent to CrossFire - if we wanted to use an offscreen GPU for rendering we have to manually manage all of the distribution & parallelisation of rendering ourselves. That’s a lot of work so it isn’t planned at the moment.

@jpine;107631

The reason I ask is that I’m also in the valley of decision with regards to a computer. I’d like to stay with Mac for the rest of my work and use Bootcamp for playback of the game. I’m not developing commercially. The project is for research using the Oculus Rift and highly detailed/realistic scenes like the Elemental and Blueprint demos. Fortunately, the OR only needs 1280x720 resolution. However, They recommend a frame rate of 85 fps.

I’d imagine that for something as complex as ElementalDemo with full desktop rendering you are going to struggle to achieve a constant 85fps on the 2013 Mac Pros regardless of which OS you run in.