(JosterD):> Quote - But i heard that memory only helps you to open more programs and not to speed up. So let's say my program and rendering with it takes just under my total memory .

In such a case, most every render engine -including Poser's FireFly- will slow to a crawl as you approach the memory limit.  Adding RAM would greatly improve render speed in this situation.

 

(JosterD):

Quote -   like say i have 4GB and my OS takes some and Poser  takes 3.5GB. that means it's still using RAM so even if you added more ram it would use 3.5GB thus it would be a waste having bought more RAM.

If you have a 32bit operating system, 4Gb is the most a vendor will put in the chassis.  Windows will use part of your OS' memory capacity to account for the video card's onboard memory, so the system doesn't even have the full 4Gb to work with.  Open system information and see how much memory Windows credits your machine with.  Let's say it shows 3.5Gb.  Poser cannot use this much, because no single process can exceed the 32bit allocation, about 2Gb, to the best of my knowledge - (corrections welcome!)  So, if your OS is 32bit, 4Gb (physical) is the max, and you can't even use all of that.

  If you are hitting this limit and need more capacity, the only thing you can do is go to a 64bit operating system and upgrade to Poser Pro 2010.  You might be able to switch to a 64bit OS and add RAM to your existing chassis/motherboard, or you may have to get a whole new computer.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5