Blender becomes very laggy while sculpting even though my polygon count is relatively low

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1

Blender has become very laggy even though my poly count is 100,000 triangles. My PC should be easily able to run such polygon count as it has a:

  • ryzen 5 1400 Quad core 3.2 ghz
  • 16 gb RAM
  • Geforce GTX 1070
    additional information related to this subject is that when sculpting with blender, only around 10% of my cpu is being used, 400 mb of memory and gpu usage can spike to 20% at times.
    I have tried looking in other forum threads for people having similar issues however I have found noting.
2

Are you using Blender 2.79 or 2.8? 2.8 still needs speed-up.

3

Hmm I don’t know I see these posts popping up here and there but me personaly I don’t have a problem.

I7 7800X (3,5 gHz 4.0 turbo)
32 GB ram
GTX 1050ti

I use Blender 2.8 and right now my sculpt has 530k tris and sculpting is fast and smooth. Worth noting I have disabled wireframe over mesh. With enabled wireframe it is laggy.

T.

PS: reply should have been to OP sry. :slight_smile:

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4

On both 2.79 and 2.8 the performance is very similar.

5

Ok. Over here I can clearly notice 2.8 being slower generally.

6

Do you have anything running in the background that would slow down your system?
How often does this happen? All the time? Once in a while?
Drivers up to date?
PC getting too hot?
Power supply large enough?

Your hardware should handle what you are doing easily.

7

-usually 30% of my memory is already used by apps running in the background and google chrome
-This happens all the time
-My drivers are up to date
-My temps should be fine because the processing power used as already stated is quite low
-And my powersupply is more than enough for my system

8

UPDATE:
I increased the fan speed on my computer and is able to handle half a million triangles with minimum lag, Next ill update my system BIOS and hopefully further help the situation.

9

Sounds like something(you didn’t specify so could be either cpu or gpu) was likely throttled then. So your previous assessment that temps were fine/not much processing power being used was likely wrong.