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ValveSoftware / Dota-2-Vulkan

Tracker for issues specific to the Vulkan version of Dota 2 on Windows, Linux, and macOS
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Does not seem to start properly when using CrossFire #107

Open tovine opened 8 years ago

tovine commented 8 years ago

First of all: when I disable CrossFire everything works fine (aside from minor glitches as reported by others).

However if it is enabled, this happens: a tiny "window title bar" appears in the top left corner saying "Dota2" (think Windows 2000-style), after a few seconds the mouse cursor goes "Dota style" (indicating something happens), but then nothing more. If I alt-tab to the Dota window the screen is black, and if I click it I get the "application not responding" box.

System info: Windows 10 (1151), newest updates as of today (28.05) CPU: Intel i5-4670k, 12GB RAM GPU: (2x) AMD HD7970 3GB, driver version: Crimson 16.5.3

Marduk-dk commented 8 years ago

I can confirm it happens just like that for me with 2x 290 cards.

When running without crossfire enabled, i do get some random gpu usage across both gpu's and im hitting 160fps at times tho, so seems vulkan can use both cards.

Bot i am seeing core speeds of 5-800mhz aka all over the place on both gpus when im running vulkan.

Tele42 commented 8 years ago

It should be noted that the Vulkan spec does not yet contain provisions for multi-gpu configurations (and possibly multi-vendor gpu support). After the Vulkan spec picks up support, then a standard-compliant method could be investigated to properly make use of more than one video card. I would not be surprised if you are getting one card-worth of rendering power out of the pair.