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Pix4D Workstation FAQ


Q: What is the best type of CPU for Pix4D?

A: Pix4D heavily uses the CPU in multiple steps during processing, along with some lighter usage when viewing projects after they are finished. The CPU is most important in Initial Processing (step 1) and Point Cloud and Mesh (step 2), during which both the CPU's maximum clock speed and number of cores will play roles. Ideally, a CPU that has a good balance will be best: lots of cores for the well threaded parts of processing, but high single-core clock speeds as well for the portions of the code when only one core is active. In our testing thus far, Intel's Core i9 processors offer the best of both worlds.

Q: Is the CPU or GPU (video card) more important for Pix4D?

A: Pix4D primarily uses the CPU for calculations, but can do some processing on the GPU as well. In particular, the Initial Processing (step 1) and Point Cloud and Mesh (step 2) will benefit from the presence of a compatible video card. The video card is also utilized after processing, when viewing the ray cloud that has been created, and there it is the raw 3D drawing capabilities of the card that matter (rather that CUDA).

Q: What video cards are compatible with Pix4D?

A: While Pix4D will run on a system with almost any modern video card, only NVIDIA GPUs which support CUDA 6.5 or higher can be utilized to improve processing speed. All of the NVIDIA GeForce cards we offer in our recommended system fit this description. We have also tested NVIDIA's Titan and Quadro series cards, but while they do technically work they are much slower than GeForce cards in this particular application. There is a workaround to let Quadros perform better, but even then they are no faster than high-end GeForce models... and there is no known fix for Titans.

Q: How many video cards does Pix4D support?

A: As of version 4.0.24, only a single GPU (video card) is utilized by Pix4D at a time. If multiple video cards are present in a computer, Pix4D will periodically check to see which is being utilized the least, and will run on that card. If Pix4D is the only major program running, then there is no benefit to a second GPU. Theoretically, if a user had Pix4D going while also using another graphics intensive program, then a dual GPU setup might be helpful - but we do not have any test results which actually demonstrate that.

Q: How much RAM do I need?

A: Memory requirements in Pix4D depend directly on how many photos you are working with, the size of the images themselves, and the quality settings you want to use. However, with the default processing options in Pix4D we found that actual memory usage is fairly low - even on large image sets. The biggest set we have tested to date was comprised of over 2600 images (~10MB each) and that project peaked at using about 20GB of memory during processing. The amount of memory used also depends heavily on what quality settings you select within Pix4D, though, so memory usage can be much higher depending on your specific workload and preferences.

Q: Should I get a solid state drive (SSD) or hard drive (HDD)?

A: We strongly recommend using solid-state drives on all computers these days. They have a huge impact on every aspect of computer usage, from faster boot times to more responsive operation. Even fairly big image sets for Pix4D should be able to reside on a SSD without requiring a very large drive, and having them on a fast drive will be beneficial to certain steps in processing. If you need additional storage for data archival or backup, though, a secondary hard drive is a viable option.

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