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Moved Assassin's Creed Unity and Syndicate crashes after start - related to CPU cores?
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Hi,
I reported to Ubisoft, ACU and ACS kept crashing on startup.
After several weeks with them trying to understand what would be wrong with my device, i finally ended with a conclusion.
If you are a user with a device that has more than 20 cores of CPU, then this mitigation is for you.
You should limit the number of cores on boot, using msconfig tool.
Type msconfig on Search, then go to Boot>Advanced options>Select Number of processors and then pick a value. Ex: 8 cores.
Then reboot.
I'll try to convince Ubisoft to update those games in order to limit the number of cores, but if not, i'll update this post with another solution... such as running a process with affinity.
Stay tuned. -
Update. The limit is actually 30 logical cores. I've been testing since i posted this topic. So you can select a maximum of 30 cores to avoid crashes within the game. Also, Black Flag had a poor performance when using more than 30 cores. So, since i limited them, now runs smoothly.
Forget starting the game with CPU affinity. That does not work unfortunately.
Also forget DDA your GPU to a VM. The display used to show decoded graphics on the dedicated GPU has bad performance. I've tried that.
The only way is changing the bcd by limiting the number of cores. -
Hello @marcoenxuto360, thank your posts and for sharing your experience of these crashes.
I am busy doing a little housekeeping on the forum, and noticed we had missed some of your posts, should you ever need to report an issue with the game, please post in our Player Support sections of the forum, so that we may report these issues to our respective game team, and investigate further for you.
The general discussion section is more for discussing the gameplay or story of the game, so we may miss player's requests for help or issues they are reporting here. I will move your post now.
You are indeed correct that some of our older games will struggle to run or launch on CPU's that have a high amount of cores.
We started a report on this and passed on our player findings some time ago, thank you for sharing the method of this workaround. I believe it may have been you and another player that initially brought this to our attention some time ago if my memory serves me correctly!
Can I please ask if you have had this problem with any other games than Assassin's Creed Unity and Syndicate, and can you please tell me what model of CPU it is you use and how many cores you have, so that I may pass this information on?Official Response'Nothing goes over my head. My reflexes are too fast, I would catch it' 🐄💨💨💨
1 Reply
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@ubi-milky Sorry to post on the wrong section. Please move it for me. Would you? Thanks.
The CPU model: Intel(R) Xeon(R) CPU E5-2673 v4 @ 2.30GHz 2.30 GHz -
@marcoenxuto360 Got it, thank you. I'll update the report with this information. If you have anything further that you'd like to add in the future, please feel free to bump this thread.
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last edited by Ubi-Milky