Big slowdown on SMG1 on High-Spec PC

[LordBarker]

As above.
Have been using Dolphin for years and currently on the latest stable of Ishiiruka, but no matter if this version or the official one I'm getting big performance dips, sometimes down to 40fps in SMG1. I've altered many graphics settings one-by-one, and these make zero difference. Is it just a case of the recent builds having issue with SMG1 again? As I have an older offical build which runs it perfectly. For ref I'm running a sandy Bridge @ 4.5ghz, 20GB System RAM and a GTX 1060 6GB, so should be more than enough grunt in all areas, and has been before. 

[KHg8m3r]

Does the slowdown happen when you have all graphics enhancements turned to 1x?

[DJBarry004]

Also, while still being able to emulate most games fine, Sandy Bridge CPUs are no longer considered "high-spec". There are newer architectures faster than that right now (read: Haswell, Skylake, Kaby Lake...).

[Helios]

Sandybridge at that clock speed shouldn't be slow. A haswell/skylake at the same clock speed will cream it, sure. But I'd imagine a sandybridge clocked that high would run Dolphin fine.

Does the slowdown happen when you look at the sun, by any chance?

[LordBarker]

Does the slowdown happen when you have all graphics enhancements turned to 1x?

Yup, in both the official build and Ishiiruka oddly.

Sandybridge at that clock speed shouldn't be slow. A haswell/skylake at the same clock speed will cream it, sure. But I'd imagine a sandybridge clocked that high would run Dolphin fine.

Does the slowdown happen when you look at the sun, by any chance?

Nope, it happens if I fall off the planet and get 'bubbled' back onto land. And at the tart of a LOT of world for some reason. In previous versions I have no issues at all, so it definitely isn't the CPU as someone suggested above.

[KHg8m3r]

Double check the Nvidia Control panel to see if you have a high performance power profile for Dolphin.

[JMC47]

When you fall down, usually it triggers the game's sun effect in that area because it's at the horizon. This is probably EFB Access to CPU, which is just slow to emulate.

[LordBarker]

Double check the Nvidia Control panel to see if you have a high performance power profile for Dolphin.

Made no difference, cheers.

[LordBarker]

Sandybridge at that clock speed shouldn't be slow. A haswell/skylake at the same clock speed will cream it, sure. But I'd imagine a sandybridge clocked that high would run Dolphin fine.

Does the slowdown happen when you look at the sun, by any chance?

My mistake, it does do this re: the sun, yes!

When you fall down, usually it triggers the game's sun effect in that area because it's at the horizon. This is probably EFB Access to CPU, which is just slow to emulate.

It didn't do this in earlier builds, is this a new feature? Or a more accurate emulation feature?

[JMC47]

You likely were accidentally overriding the feature before. It's also used for stuff like pullstars, so if it was off you'd be breaking the game.