View Full Version : more memory same render speeds ???
sebek27 06-15-2003, 04:58 PM i doubled my ram from 512 to 1024 on my second pc and rendered the same exact scene with the same exact settings and it rendered the scene actually at 5:05 from 5:02 !!! how can that be ??? more memory and it took longer ?? what gives?
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sebek27
06-15-2003, 05:04 PM
just rendered it again and it was 5:10 !! it's going up... i have no clue what is going on, i thought more mem would speed things up, what a waste of money :(
Akesson
06-15-2003, 05:17 PM
Rendertimes will decrease only if you´re running out of real memory so that the virual memory (hard drive) will be used. The scene you are rendering is not running out of memory with 512 MB so of course you will see no difference in rendertime with 1024.
As for the 5.10 time you probably just have some more processes or something running. Do a restart and your rendertime should be between 5.00 och 5.10 in every case.
Cheers,
Peder Åkesson
sebek27
06-15-2003, 05:20 PM
thx i actually just thought of the same thing... more complex scenes will probably render faster since i have more memory if they ever use that much
render time is mostly all about CPU power and nothing else, if you have a descent amount of memorey already like 512 then the only thing that is going to help is more cpu power
Mentat7
06-15-2003, 05:55 PM
More CPU power=faster renders
More RAM=larger images
:)
if you are using mega caustics ram will help you.
But it does not speed anything up. Just makes it so you can do more. Not do anything faster.
A hardrive doesnt make your computer faster and neither will RAM. unless you have some new bus or something, but that is different.
just like with the new shave, is uses 1 percent of the old memory. Doesnt do anything faster, just does more of it easier.
imashination
06-15-2003, 08:56 PM
Think of it this way, you're driving a car, half full of luggage to the airport. Increasing your capacity with a trailer isn't going to get you there any faster.
Adding RAM allows you to render more complex scenes, you will only get a speedup if your scenes are so complex that they didnt fit into the 512 you had.
If you want faster renders, get a faster machine
Kotayus
06-15-2003, 09:03 PM
ya like a AMD 3200+ its out benchmarked intels 3.06 HT chip.
dann_stubbs
06-16-2003, 12:11 AM
actually more ram = more overhead for the cpu so it can mean a tiny bit slower overall.
the only other thing could be if your new ram was a slower timing (i.e. 2.5 vs 2) or a slower spec (such as pc100 added to a pc133) this would slow the overall ram timing down to the slowest speed - that could be an explanation for the subtle decrease as well.
your only speed increase will come from any render that is greater then the 512mb - then the much faster additional ram will clearly be faster then the swap space usage.
we discussed a topic much like this over a year ago in a different forum and at the time i had some benchmarks to show - but no idea where they are now...
but that's the scoop.
dann
imashination
06-16-2003, 01:11 AM
Originally posted by Kotayus
ya like a AMD 3200+ its out benchmarked intels 3.06 HT chip.
I VERY much doubt that. With c4d at least. 3gig HT machines currently top 360 CB points...
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