25% LONGER render time 32gb vs 16gb ram
Posted: Sun Dec 20, 2020 2:37 pmHello all, first let me just say that I don't know if this is an issue with the 17 Beta version that I am using or also with the version 16.
Context of the image is described below.
I made a video edit ~35m long and rendered it on my PC with 16gb of ram which needed around 20m minutes. I've rendered it a few times because I did some tweaks here and there but the render time didn't change significantly.
I then upgraded my ram to 32GB and rendered the same edit a couple of time and it took 5 to 7 minutes longer, which doesn't make any sense to me.
System specs (16GB):
MSI B350 Tomahawk motherboard
MSI GTX 1060 6GB (OCed memory and speed)
AMD Ryzen 5 2600 @4GHz OC
Kingston A2000 1TB m.2 nvme scratch drive (runs at about 1500MB/s read/write)
Water cooling CPU and GPU, so thermals shouldn't be an issue
Memory (2x8) 16GB DDR4 G.Skill Trident Z rated @2400MHz (OCed to 3200MHz and custom timings)
When adding extra ram (2x8) for a total of (32GB)
16GB DDR4 G.Skill Trident Z rated @3200MHz (OCed by applying different custom timings than when using 2 sticks in order for all 4 sticks to be able to run)
So my question is, did anyone experience something similar? Is this a known "issue" and is this how it's actually supposed to work? I know that he CPU uses more bandwith to communicate with the RAM but 25% increased render time is quite a lot, and no I didn't have any fancy fusion compositions (just some text and images nothing fancy). Is this an issue with davinci resolve or maybe the ryzen system itself?
Context of the image is described below.
I made a video edit ~35m long and rendered it on my PC with 16gb of ram which needed around 20m minutes. I've rendered it a few times because I did some tweaks here and there but the render time didn't change significantly.
I then upgraded my ram to 32GB and rendered the same edit a couple of time and it took 5 to 7 minutes longer, which doesn't make any sense to me.
System specs (16GB):
MSI B350 Tomahawk motherboard
MSI GTX 1060 6GB (OCed memory and speed)
AMD Ryzen 5 2600 @4GHz OC
Kingston A2000 1TB m.2 nvme scratch drive (runs at about 1500MB/s read/write)
Water cooling CPU and GPU, so thermals shouldn't be an issue
Memory (2x8) 16GB DDR4 G.Skill Trident Z rated @2400MHz (OCed to 3200MHz and custom timings)
When adding extra ram (2x8) for a total of (32GB)
16GB DDR4 G.Skill Trident Z rated @3200MHz (OCed by applying different custom timings than when using 2 sticks in order for all 4 sticks to be able to run)
So my question is, did anyone experience something similar? Is this a known "issue" and is this how it's actually supposed to work? I know that he CPU uses more bandwith to communicate with the RAM but 25% increased render time is quite a lot, and no I didn't have any fancy fusion compositions (just some text and images nothing fancy). Is this an issue with davinci resolve or maybe the ryzen system itself?