5 Replies Latest reply on Sep 12, 2011 5:47 PM by Bill Gehrke

    Would Additional RAM Show A Difference?

    glaustin Level 2

      Hi Guys

      As mentioned in another thread, I'm having some work done to replace a dead MoBo. I'm running Win7 64bit, Intel i7, NVIDIA Quadro FX3800 graphics card, 3x1tb hard drives and 12gig of RAM.


      The engineer has contacted me to see if I want to increase from 12gig RAM to 24gig. I'm a bit torn. On the one hand going to the RAM max really interests me but on the other hand I'm close to my budget (too much more expenditure and I could have had a new PC built).


      Can I ask in your experienced opinions, would increasing 12 gig to 24gig potentially offer an even more responsive/ faster work experience or, taking account there's already 12gig in there, mean there would be little noticable difference to the work flow?

        • 1. Re: Would Additional RAM Show A Difference?
          Harm Millaard Level 7

          With versions up to 5.03 there was a very distinct difference between 12 GB and more. It looked like passing the 12 GB border gave you a huge performance gain and it did not require to go the full yard to 24 GB. However with CS5.5 it looks like that giant step in performance is no longer that obvious or prominent. 24 GB will perform noticeably better with CS5.5, but not as clearly as with CS5. If you currently have three sticks of 4 GB each, I would add another three sticks (same brand/model) but if you currently have 6 x 2 GB sticks, it would mean that three of those will become unused and memory can only be increased to 18 GB or you have to exchange all sticks. Difficult choice...


          What kind of source material do you normally edit? With uncompressed, P2Intra100, 4:2:2 50Mb material, I think it would be a good move because of the space requirements, but with AVCHD or HDV, I'm not sure. Sorry.

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          • 2. Re: Would Additional RAM Show A Difference?
            glaustin Level 2

            Many thanks Harm

            My source material is captured HDV 1080i from my Sony Z1 (still tape!) now mixed with .mov files from my Canon 550D. My RAM configuration is 6 memory sticks of 2gig.


            I'm happy (if that's right word) to lose the 6x2 gig sticks in favour of a new batch of 6x4gig. Money is not a problem at this stage if the return is a likely appreciable performance gain in CS5 (but I'd cry if I bought a bunch of new 4gig sticks and the likely result was no obvious change).

            • 3. Re: Would Additional RAM Show A Difference?
              Harm Millaard Level 7

              I elevated your memory question to someone who is allegedly our "Supreme Source of Expertise", at least that was what I was told at the IBC today. That person may respond here or he may prefer to PM me. Anyway, I'll try to follow up on this issue with the information that I can share and prevent you from making unwise investments. My reason for not giving a more direct answer is because of the huge changes in caching algorithms and memory management between CS5 and CS5.5, so I need to get information about the "under-the-hood' operations of the two versions, but then I may be limited in what I am allowed to divulge.


              With HDV material and CS5.5 my guess is that the gains are limited.

              • 4. Re: Would Additional RAM Show A Difference?
                glaustin Level 2

                Thank you Harm, That's really nice of you and very much appreciated.




                • 5. Re: Would Additional RAM Show A Difference?
                  Bill Gehrke Adobe Community Professional & MVP

                  Maybe this is not valid for your case of HDV editing but our very complex PPBM5 benchmark shows significant improvement in the two CPU intensive scores when going from 12 GB to 24 GB.  The MPEG2-DVD encoding went from 95 seconds to 60 seconds and the H.264 encoding scores dropped from 52 seconds to 44 seconds.  This was with CS5.5 and my  4.2 GHz overclocked i7-980X with and the GTX 580.  As Harm has said you do not really have to have 24 GB it seems that just anything over 12 GB  seems to benefit Premiere. It will be interesting to see Adobe's comments.