Calculating PC bottleneck

agour

agour

agour

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Joined
13 May 2013
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22
Hi all,

I built a PC a while back for rendering out timelapse files.

Essentially using Adobe after effects to convert camera RAW images, to high res videos.

I have a similarly specced pc to a friend, yet his renders 10-20x faster. So, I'm trying to figure out where the weak link is.

i7-5820K 3.30GHz
Gigabyte GA-X99-UD4
MX100 256GB
Palit GeForce GTX970
32GB Crucial 2133MHz CL15-15-15 DDR4
Multiple drives in RAID 10

When I render, my CPU usage goes to 100% on all cores, and the RAM usage is also maxed out.

I have tried rendering files from ssd->ssd, and hdd->hdd, and the speeds are the same. This makes me think it must be a CPU or RAM bottleneck.


Any ideas how I can figure it out ?

Cheers
Paul
 
chroniclard said:
Whats the friends pc spec?
Is his overclocked?
Click to expand...

I can't remember exactly off the top of my head...

Though it was one or two processor models up (so not much speed difference).
64gb of ram, PCI SSD, and a gtx 980.

I've got GPU rendering turned on, so I don't think that's the problem.

His CPU is overclocked, so that will definitely help somewhat (though I can't imagine it making 10x the difference?)
 
That got me thinking - how do I REALLY know the GPU is being used.

Downloaded techpowerup gpu-z and monitored it as the render was running.

No change in memory used, OR GPU load. So.. the graphics card is NOT being utilised! I'll investigate this some more to see if AE should be using it or not..
 
Turns out the GPU won't really be used when rendering these files anyway.

I asked my friend about it, and he thinks that upgrading the ram/cpu will make a ton of difference! I'll try the RAM first, and then learn how to OC the cpu :)
 
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