What to check for slow render weirdness...

[phil_w]

Any pointers here greatly appreciated...

I have two PCs - One i7 4770k 3.5Ghz with 32GB RAM, and the other one is a Dell T5500 with Dual Hex core E5645 Xeon 2.4Ghz with 64GB RAM. Both have two GTX 1070 cards inside. Both running Win Pro 64bit and latest Octane for C4D.

I've noticed that the Dell for some reason takes approx twice as long to render the same scene in C4D R18 - but looking at the processor/system usage nothing seems to be getting taxed at all - minimal RAM usage, minimal HD usage, almost non-existent GPU usage (If I can believe WIndows).

The initial geometry gathering in Picture Viewer is essentially the same speed on both - just when GPU stuff is taking charge does it seem to be on a go slow...

Also, and not sure whether it's related... but the i7 seem to be in intelligent, and if, for instance, the was 24 frames at the beginning of a sequence that are identical, it cracks through the first one, then almost instantly does the other 23 before moving onto the next one that requires "proper" thinking... The Xeon machine doesn't do this. All a bit weird... Not sure how much i7 vs Xeon is involved once Octane gets busy with GPU?

Either way, the Dell doesn't really seem to trying that hard judging by the resource monitor - could understand it a bit more if it was maxed out and struggling for resources somewhere....

Anyone seen similar?

Cheers!

[phil_w]

I may have improved the Xeon machine quite a bit by rolling back the NVidia driver to a November ‘17 version... can the drivers make that much of a performance difference?

And if it is in a better mood now... why would it pick on one machine and not another? They both had identical versions of the drivers....

Puzzling...