Not to bore with all the details but went from 6gb to 8gb this morning on my 15 in 2.93 by pulling the 2gb chip and replacing it with a match chip that I already bought from OWC. First off so far it seem to run stable without any visual issues going on. Booted right up after instal than I ran my tests. I will just give you the improvements from going from 6gb to 8gb. I have been doing tests all along in Photoshop going from 1 SSD to 2 SSD in Raid O and from 4gb to 6gb to finally 8gb. Let's just say there have been improvements going up in every category of my testing. Just from 6gb to 8gb iin a very long action in Photoshop I got just before the install 59 seconds to complete this action with 6gb after the install to 8gb this action took 54 seconds. Capture One which is a lot like Aperture to process files I shaved some time off also. Here the test was 10 Raw files to a output of 228 mgs each with 6gbs it took 3:55 and with 8gb it took 3:44 and this is basically a more processor hungry program than Ram but Ram still made up some time. My X bench score jumped up about 6 points and my Geek score jumped up about 80. So overhaul this is working as expected and as several others on this forum said it works. To them thanks for the vote of confidence. To others these may not seem like much but as i work with very large files both in Quark and Photoshop this amount of ram will show even better improvements. I am pushing the Ram but not to it's fullest yet but everyday work it seems to be making very nice improvements. I will continue to work on things that push it too it's knees but so far very nice. Also heat and fan speed have not changed at all. Also I still am getting my blinking at me . Which is a Apple issue. I still have some permission issues in I tunes and I life products that are driving me nuts and can't seem to straighten out and frankly I give up. I hope 10.5.7 will straighten things out in that area and also the blinking issue. Thanks for listening but I am happy and this is not a money thing. I am 52 years old and can afford to have a rocket ship in my arsenal and this is for business reasons for maxing this thing out as fast as I can get it. Next move is obviously Enterprise SSD drives but that will wait until the price drops. I n reality in Photoshop it actually beat a 2.66 667mhz 12gb of Ram with 3 10k drives with Raid 0. Now that is impressive for a laptop. In raw processing I lost time because of the reduction in cores but not by major amount but overall kicked the crap out of my old 2.4 2006 MPB. Can't have it all but this is good.