( RED graph bar indicates the fastest in elapsed time.) We timed how long it took to Reduce Noise in a sample RAW image (all settings maxed). We used the 'Deliver' function to export a 289 frame RED Digital Cinema clip (4800x2700 with 5:1 compression ratio) to QuickTime ProRes 4444 in HD 1920x1080 with both 'Force sizing to highest quality' and 'Force debayer res to highest quality' enabled. We enable Multiprocessing in the Performance preference panel and specify 1.5G of RAM per background spawned sub-process. It is one of our real world ways of maxing out the CPU and memory. We use a sample project created by Total Training for benchmarking various Macs and PCs. ( RED graph bar indicates the fastest in total audio tracks.) In this scenario, we keep adding audio tracks until we get a 'System Overload' message during playback processing. Our newest 'real world' benchmark adds audio processing to our suite of tests. (All three iMacs had 32G of 1600MHz DDR3 RAM installed.) IMac i7 G780M = 'late 2013' iMac 3.7GHz Quad-Core i7 GeForce GTX 780M GPU IMac i5 M290X = 'late 2014' iMac Retina 5K 3.5GHz Quad-Core i5 Radeon R9 M290X GPU IMac i7 M295X = 'late 2014' iMac Retina 5K 4.0GHz Quad-Core i7 Radeon R9 M295X GPU

And we added the best non-Retina iMac Core i7 with GTX 780M GPU. Though we gave you a snapshot two days ago, today we have results for real world apps comparing the 'entry' Core i5 with M290X GPU to the 'top' Core i7 with M295X GPU. Both ship with the AMD Radeon R9 M290X GPU unless you specify the optional R9 M295X GPU. The iMac with Retina 5K Display comes in two CPU 'flavors': The quad-core i5 and quad-core i7. Posted Friday, October 31st, 2014 by rob-ART morgan, mad scientist

Imac 27 late 2013 780m