Hardware and GPU editing in Premiere Pro

Question

Hey guys,  I have a terrible doubt abt my hardware..
I have
-i5 4th generation
-8gb ram
-GPU GTX570 CUDA 480
Standard Memory Config 1280 MB GDDR5
Memory Interface Width 320-bit
I'm aware that this is not the best of pc of the world.. but I need to edit videos  as Mov, MTS, natives formats of cameras.. I want to improve my PC. Which is better to invest Processor or GPU? I wanna improve my workflow,
preview better with effects etc.
Some Help please.
Thank you!

Answer 1

Bill/cc_merchant,
So you are saying that there is a limit to the number of Cuda cores that Pr will use?  That going from 480 cores to 1536 (or more) will not show any appreciable improvement in rendering speed?  Especially without knowing whether or not his CPU is maxed while rendering or what kinds of effects he is using?
I ask this because (1) I really want to understand where the best bang for my buck rendering is going to go and (2) I'm in a similar position to Felipe.  I need to upgrade because my render times are out of control.  I try to stick to effects that benefit from GPU rendering and believe that is the direction Adobe is going and that, eventually, in so far as they can be adapted, all effects will eventually benefit from GPU rendering.  Am I way off base here?
I have a similar GPU (560ti, 1GB, Pr GPU .txt hack), but other parts of my system are significantly different (i7-3770, 16GB, RAID 0 SSD OS and Rendering drives).  I need to do something because my render times are way longer than I think they should be these days (up to 4:1 render time to display time (or MUCH more with Neat denoise, which is supposed to be Cuda core capable)).
I cannot find any definitive information regarding what Pr benefits from and what its limitations are.  For example, is there a limit to the number of Cuda cores that Pr will use (effectively) and are more cores more important than more VRAM?  Especially in light of the relatively huge VRAM available on Quadro cards.  What is the recommended minimum VRAM that any Cuda card should have these days, especially in light of future capabilities, such as 4K and/or built-in effects.
Thanks for any light you can shed on this subject because I haven't been able to find any!  I'm on a limited budget and can't afford to spend $2-5K on an "ultimate" system.
Scott
PS. I don't believe in overclocking because it (1) can cause hard to track instability problems and (2) increases temperatures and every 10-15% increase in temp, results in about 1/2 the life expectancy of the components.