Emulator

Game Name?

Metal Arms: Glitch in the System (although I'm sure it can happen in others, if they tax the emulator enough)

Game ID?

GM5E7D

MD5 Hash?

c0127b69963591edcac97437bc407272

What's the problem? Describe what went wrong.

I have found that the game lags with my new system, and sometimes has an extra stutter that it shouldn't have. Less lag occurs if either dual-core is unchecked, or if audio is set to 'none', although it doesn't go away completely.
I attempted with all default audio back-ends, and all graphic back-ends, and it happens in all of them, some more noticeable than others.

The issue primarily occurs when explosions happen; they don't have to be on-screen.

On my previous specs, I did not notice this issue with any version of Dolphin (up to and including 5.0 Release).

What steps will reproduce the problem?

Have relevant hardware, make sure dual-core is checked, and audio is enabled.
Play a level with explosions (almost all of them)

Which versions of Dolphin did you test on? Does using an older version of Dolphin solve your issue? If yes, which versions of Dolphin used to work?

Tried on 4.0.2, 5.0 RC1, 5.0 Release, and 5.0-4602. Issue happens with all of them.

What are your PC specifications? (CPU, GPU, Operating System, more)
Current specs:
i7-7700k stock
16GB DDR4 RAM @ 2400
ASRock Z170M Extreme4
GTX 970

Previous specs:
i5-4670k
20GB DDR3 @ 1600
Gigabyte GA-Z87-HD3
R9 280x

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)
Every test is done with 1x internal resolution, no extra graphical options enabled

These videos were taken from 5.0-4602
Video while dual-core is checked: https://youtu.be/ssZ5AUSI3yM (lag + stutter at 1:19; that's not a system audio glitch, it's in the game)
Video while dual-core is unchecked: https://youtu.be/yfQ55Qt5ZSU (lag at 3:10)

Video from GCN: https://www.youtube.com/watch?v=IJMoQXIofjA