No. It only makes a difference if you upgrade to CS5 and then it makes a huge difference. Then 24 GB pays.
Since CS4 is 32bit it is limited in the memory it will use
Does that mean if I upgrade to an i7 64 bit machine to be used for CS4 only, and not CS5, I will be wasting my money getting 16GB RAM?
Or will it be helpful since it will allow more memory left over if other processes are running?
I looked at the ADKvideoediting site and am considering the Intel - Core i7 870 2.93GHz Quad/ HT 8meg Cache 2.5 2.5GT/s DMI processor along with 4X4GB DDR3 1600 1.5v 9-9-9-24 RAM.
First of all, you are better off with a X58 mobo and an i7-9xx CPU, running Win7-64 Pro. The i7-8xx is nice for gamers, not for video editing, due to the architectural limitations of the P55 chipset.
Start with 12 GB memory (3 x 4 GB).
Then for multitasking more memory makes sense. For PR CS4 alone, it makes no difference.
I had not planned on upgrading to CS5 because I can't afford the required graphics card to take advantage of the Mercury Playback engine (at least, not right now). But your answer has piqued my curiosity. If I upgraded to Premiere CS5, and added more memory to my system, but did not upgrade my graphics card, what sort of improvement in performance might I experience?
(I did try out CS5 when it came out, but my 30 day trial has ended so I can't run my own test to answer this question)
Even if you do not have a MPE capable card, but have say 12 GB of memory, you can see a performance improvement of around 30%. This has been shown with the older PPBM4 benchmark.
Thank you, Harm. I'll look into that.