Does the NVIDIA GeForce GTX 780M with 4GB really make a difference

I'm Pretty ****** that you can not upgrade. Even if i have it sent in. I asked customer service why? They said it because thats what APPLE wanted. I couldve recieved 2 gigs of Video ram currently complamentry of my purchase a month ago. Instead I upgraded from the 1 gig to the 2 gigs of video. I am a fellow video editor i could've used all the video ram I could mustard. Thanks apple. If you decided to upgrade at least let us know! I wouldve waited a couple of weeks and bam 4 gigs of Video ram. Or choose to let us upgrade! Fighting Apple products now on.

Certain applications such as Photoshop or Final Cut Pro will benefit from the higher video ram, however the GTX 680M is a very powerful card and the 2GB of ram that it comes with should be more than sufficient for most tasks.

Only extremely large files/projects will truly benefit from having the 4GB or ram that the GTX 780M supplies.

The 2013 iMac offers a performance boost over the 2012 version, however the increases in terms of CPU/GPU power are mostly modest.

The Haswell architecture was designed with mobile use as the primary focus and so areas such as energy usage were the priority.

The Nvidia 7XX graphics cards run on the same Kepler architecture as the 6XX cards, as with the Intel CPU the improvements are there but there is not a huge leap forward.

Apple made it very clear that iMac VRAM is not upgradeable on its spec pages, and you could have asked any Apple Genius bar member that question, or users on this board before purchasing. Furthermore, you had a return period you could have used. Also there is a recycling program at http://www.apple.com/recycling/

Both http://www.gazelle.com/ and http://www.powermax.com/ can offer you very good value for your used Mac, so you can buy the Mac you wanted to get in the first place. See my FAQ* before offloading your machine to someone else. This is just a user to user board.

* Links to my pages may give me compensation.

Lastly if at any stage you got misinformation, you can call Applecare during the first 90 days to tell them where that misinformation exists, or speak to the store manager where you bought it at.

http://www.apple.com/feedback/is another place you can give feedback.

It will help in rendering of video and images and the speed of that. Some Photoshop or Video applications that do graphics intensive computations will be faster if they are optimized for that GPU. Contact the software vendor and ask them if they do GPU based optimizations, and which tools are optimized more for GPU than CPU?