“The computer comes with at least 8 GB DDR3 SDRAM installed as two 4 GB DIMMs into two slots. If you have this model you can safely journey over to OWC’s site and order yourself a nice 32GB upgrade kit for total bragging rights among your Apple fanboy circles.īut first, you need to know which type of RAM your iMac accepts.Īpple says, “iMac (27-inch, Late 2013) computers have four SDRAM slots in a compartment located on the rear of the computer.” So does anyone have a clue how to get past this problem? Is this issue with Premiere Pro or does this indicate that the RAM upgrade itself broke my graphics card or logic board? I did the RAM upgrade according to Apples instructions.If you’re out to get some RAM for your new iMac and think you can do better than Apple (price-wise), it might be a good idea to check out the official memory specifications before leaving the house.Īpple’s KB article HT5908 explains that the newest (Late 2013) iMacs are pretty much the same as the ones before them, in that the RAM is only user-accessible on the 27-inch model. Oh and sometimes using a second display also freezes the computer, but sometimes it works fine. But GPU accelrations in Premiere ain’t working.

Quick time plays videos nicely, so does preview, and so does Premiere with CPU accelration… After Effects works. After switching to GPU (OpenCL) it crashed the whole computer.Īfter this I did various things: Restarted many times, took the new RAM away (which actually made the situation worse), put it back in, changed the slots, zapped the PRAM (cmd + option + p + r), did system report (booting with D pressed)… Switching back to GPU (CUDA) again lost the video and showed only white screen with some graphic glitches. I found out that when I switched from GPU accelration to CPU accelraion I got the video playing too. At first it didn’t show any picture on the program and source monitors, it played audio ok but no video. I did some work with Adobe After Effects and everything went fine (blurring faces with adjustment layer and masks, no hard 3d stuff etc.).īut after I opened Premiere Pro my problems started. So I decided to put the left over RAM (8gb which was included in the new computer package) in to my computer.Įverything went well, OSX recognized the memory and all. This new one had maxed RAM (32gb) and my computer had just 8gb. Today at work we got a new iMac 27″ Late 2013, same as I have.

I searched for similar topics around internet but didn’t find any problem like mine.

Imac 27 late 2013 ram upgrade