Your GPU is very important with Adobe Premiere, so control your monitor resolution with SwitchResX to save video memory, especially on an iMac or iMac Pro

When my MacPro 4,1 finally kicked the bucket I was devastated, especially since the new MacPro wasn’t out yet, and I needed a machine to edit on. The solution was the very powerful iMac Pro with the Radeon Pro Vega 64X 16GB. Now that blew my old video card out of the water, but video editing apps can use every bit of power you have and more, so you want to save as much video processing power as you can.

The problem is that the default settings or even scaled settings on an iMac Pro or even an iMac are made to make the screen look amazing, not save on video memory, and for a long time the OS X control panels have removed the important statistics on the display control panel.

Now if you hover over the choices it tells you what resolution it is like and that scaled resolutions might affect performance, but they don’t tell you what the default resolution is actually doing.

This is where the awesome SwitchResX comes in. The app is $16, or $250 for a site license. It takes a little playing to get it all set up nicely (especially turning off all the resolutions that you don’t want).

It runs in your menu bar, and you can customize to remove all the resolutions you don’t want, but when you go into the iMac Pro or iMac’s resolutions you see where I am going.

You can see I have chosen 2560×1440 which is the normal default resolution, but I have not chosen the HiDPI version. HiDPI is what Apple does to make the monitor look great, it takes your resolution and runs it twice to subsample and make it look better, but basically whatever video ram it is using for your primary display it is doubling it to make the display look nicer.

For a video editor this is a huge no no, don’t waste your video memory, it is precious! Make sure to set your display to a non HiDPI resolution so that you are not wasting your video memory!

Of course this isn’t all that SwitchResX can do, you can actually set different resolutions for different apps and have it change as you switch apps. Now I have tried that out and it worked very well, but I have realized I just like one resolution for my 2 monitors, and try and save as much video memory as I can, so that is why I use SwitchResX, and the less video memory you have the more important this is.

I am assuming this will be the same with M1 iMacs, but they don’t exist yet. If they stay like the current M1 macs and share memory with the mac, then it is even more important to use less memory for your display so that you can use more for editing!