Denoising takes too long in my PC

[CharlyRT]

Hi, I was wondering why my PC takes too much time to finish Denoising, it always denoise 1-70 very fast but in 71-75 takes a lot of time, the same scene doesnt take this much time to denoise in another machines. Could it be my HDD? My hardware is better in my PC than the others.

[romullus]

What is 1-70 and 71-75? Is it animation frames, or maybe denoising amount? What denoiser you are using? What resolution images you are typically denoising that takes very long? And how exactly long is that too long? Are we talking about seconds, minutes, hours here? Do you have enough RAM? What about other hardware (CPU, GPU model)? Be more specific if you want to get actual help and not just wild guesses.

[CharlyRT]

70 - 75 Means Denoising amount, Im using Intel Denoiser
Images from any resolution, right now im rendering in 2000 px, 1-70 denoiser amount takes less than 10 seconds,. but 70-75 takes minutes
I have 128 gb of Ram
CPU AMD Ryzen 5950x
GPU RTX 4060

[romullus]

1-70 denoiser amount takes less than 10 seconds,. but 70-75 takes minutes

Hmm, that doesn't make sense, AFAIK denoising should take exactly the same time to compute no matter denoiser amount in the settings, after all you can freely change denoising amount after the fact and it's instant.

[TomG]

Indeed the "amount" is just the strength of the blend between denoised and undenoised image, with 0 being the undenoised image only and 1 being the denoised image only. It doesn't change what denoising calculations are done.

[CharlyRT]

My bad, sorry for the confusion.
Whats happening is that I have activated "automatic saving images into history" (another thing I miss to mention)
so when denoise reach 73-75 its saving the image, but this process takes a very little time in another PC that has low specs, after turning off automatic save, denoise its fast as the other, so I noticed that the HDD destination its very old and its struggling writing, and the other PC has a SSD so its pretty fast. Again sorry for the confusion.