indigo denoiser seems unusable in gpu mode with low class CPUs like Pentium and Celerons (include gen6 / gen7)

[wob]

i found that indigo denoiser seems unusable in gpu mode with low class CPUs like Pentium and Celerons (gen6 / gen7) . i have two machines: 1) pentium / celeron processor (generation 6/7, skylake / kabylake) + gtx 1060 and 2) core i7-9650 + rtx 2060. i cant get final result on test scene (with 10 mlns polygons) with pentium / celeron pc : rendering would take forever (around 0% gpu utilisation all time; but there is no problems with rendering without denoiser test on single gtx 1060 + low cpu pc). but, denoiser works fine with i7 core 9650 (all time - 99% gpu utiisation).

[Zom-B]

Hey wob, thanks for the feedback!
A CPU with support for at least SSE4.1 is required to run Intel Open Image Denoise. Is your CPU in this category?

Denoising is very CPU heavy and I highly recommend enabling it only on the end of your render or meanhile for testing.
Best to pause rendering while you enable it

Denoising is also super RAM hungry and by default set to use max 6GB of RAM. High Super Sampling raises denoise time a lot, since internal resolution is used for denoising.
How much RAM does your systems have?