New, Fast PC Running Sketchup Pro 2018 Slow!


My company recently purchased a custom build Alienware PC for Lumion renderings, and it has performed very well on all applications. Just ran Sketchup Pro 2018 for the first time on it today, and to our surprise it was extremely slow. Looking for input on what could cause this and what we may be able to do to boost performance (other than layer management, shadows, etc.)? The workstation exceeds all of Lumion’s hardware recommendations (specs below). The Sketchup file we’re currently working on is only 72 MB…what gives?! Really expected a big performance boost out of SU with an RTX 2080…

Workstation Specs:
*Intel® Core™ i7 8700K (6-Core/12-Thread, 12MB Cache, up to 4.7GHz w/ Intel® Turbo Boost Technology)
*16GB Dual Channel DDR4
*M.2 256GB PCIe NVMe SSD
*NVIDIA® GeForce® RTX 2080 OC with 8GB GDDR6
*850W Liquid Cooled

Any insight would be much appreciated.


First step would be to make sure SketchUp was installed correctly. To do so you must log in to Windows with your normal user login and then right click on the installer exe. Select Run as administrator. At this point, to make sure it is installed correctly, do that and then choose the Repair option. Make sure you’ve quit SketchUp before repairing the installation.

Next, make sure that SketchUp is using that Nvidia graphics card and not the integrated Intel GPU.


Aside from Daves points the Ram on that machine is quite low. Are you trying to run anything else while booting up SketchUp? I have a machine at home with similar specs minus the GPU and find running large models a pain if anything else is open with only 16gb. I have upgraded to 32gb recently and found it much more responsive so in my case the RAM was the bottleneck.


Models also behave differently depending on how well they’ve been structured, etc.

Remember, SketchUp currently still is a single threaded application, so more cores won’t benefit SketchUp, faster cores will.

I tend to agree with the above comments on the RAM on your machine, it could be a tad more.

I’ve got a custom OriginPC EON17-X with i7 7700K, 64GB RAM, 1080 GTX, 512GB Samsung 950 pro PCIE NVMe SSD, 1TB Samsung 850 SATA SSD. It doesn’t skip a beat, but the performance of SketchUp on it isn’t stellar either.


a GPU faster than a GTX1060 does not help very much for SU performance, a CPU does (single-thread performance).

16 GB of RAM are not that bad, at least if SU is running alone… but utilization can be checked simply by using the Windows Task Manager (“Ctrl+Alt+Esc”) or the more advanced MS Process Explorer (free) or the Windows Ressource Monitor (“Win+R > resmon”).