Allocating memory in C4D 10

[lots]

C4D, like most apps, will use as much RAM as it needs. If you are not filling up all your RAM, its because C4D doesn't need to. This is not a bad thing. Maybe even a good thing, as using up all your RAM generally causes massive slow down.

[biggs45]

Its just that i am using about one fifth of my computers ram. If i were to upgrade my ram would it still render at the same speed because it is already using all that it needs too?

[Per-Anders]

Yes. RAM only bears any real relevance to render speed when you have too little RAM and your machine is forced to use Virtual Memory, which is very slow (being your Hard Drive). The single biggest controlling factor of render speed on a single machine is your raw processing power, that is to say the speed and number of corse of your processor.

The faster your processor the faster it will render, if you have multiple processors then the rendering task gets distributed amongst them, each one rendering a certain portion, thus speeding things up once again, there is however a certain law of diminishing returns with multiprocessing due to scene setup and data transfer so a machine with 4 cores is unlikely to be 4x as fast as a machine with just 1 core, but it may be 3x as fast or if your'e lucky even more.

[Srek]

a machine with 4 cores is unlikely to be 4x as fast as a machine with just 1 core, but it may be 3x as fast or if your'e lucky even more.
A factor that i have observed to often apply in this situation is 1.8 for each doubeling of the number of cores.
2 cores will give you a factor of 1.8
4 cores will give you 1.8 x 1.8=3.2
8 cores will give you 1.8 x 1.8x x 1.8=5.8
Of course the exact factor depends on your scene setup, which has way more influence on efficency then for example memory speed or CPU/Memory bus speed.

Cheers
Björn

[Srek]

Its just that i am using about one fifth of my computers ram. If i were to upgrade my ram would it still render at the same speed because it is already using all that it needs too?
RAM is like gasoline, if you have enough your cars drives, if you poure more in the tank it won't go faster but can keep the car going for longer
Cheers
Björn

[imashination]

I tried some old SIMMs in my civic today, it didn't like them :-/

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