I've noticed that Octane 4 has taken a lot more resources than octane 3.8 plugin.
Before Upgrading to Octane 4 my Desktop was able to run background tasks with only 1 GPU (a 1070) just fine while ongoing renderings were in process. Now with Octane 4 even setting GPU priority to low and making sure "use GPU priority" is checked, it still makes things lag incredibly hard.
Also, i tested this out on my smaller Laptop setup which has a single GTX 1050 GPU, before Octane 4 i was able to have chrome running in the background just fine while rendering things in DAZ with Octane. Now, with Octane 4 my laptop cannot run anything in the background.
Much worse is, in fact, most previous scenes that were able to render is now no longer able to be rendered simply because it seems that octane 4 takes up a ton more resources. I have many scenes that were made in octane 3.7/3.8 that rendered just fine but much slower; however, now they just simply crash to desktop when hitting the render button on my laptop. I know these scenes are not "corrupted" or "bugged" because they can be rendered in octane 4 on my much beefier Desktop PC, which means this is an Octane 4 issue.
This applies not only to the GPU/VRAM department of things; but also, octane 4 seems to now use a ton of CPU and regular RAM.
Is there a way to fix this besides simply downgrading back to octane 3.8?