The hardware specialist Puget Systems has measured the performance of DaVinci Resolve 15 with different current CPUs in different application scenarios. The latest CPUs from Intel (among others i9 9900K, i9 9820X, i7 9800X, i9 9980XE) with up to 18 cores and AMD (among others Ryzen 2700X, Threadripper 2990WX) with up to 32 cores were tested. two NVIDIA GeForce RTX 2080 Ti 11 GB - in addition to the comparison also a Mac Pro and iMac Pro with their respective AMD GPUs (however, the Macs were disadvantaged by the significantly weaker performance of the integrated graphics cards).
The results are interesting for everyone who wants to put together a system especially optimized for Resolve 15 and form a good basis for making a decision, especially with regard to whether the surcharge for a faster CPU is reflected in a sufficient performance gain in comparison. DaVinci Resolve scales wonderfully with the performance of one or more graphics cards, but the CPU must not limit their performance.
It&s nice to see in the benchmarks that from a certain performance limit (AMD Threadripper 2920X 12 Core and Intel Core i9 9900K 8 Core in colorgrading and an RTX 2080 Ti) all CPUs achieve the same test results, i.e. that more cores don&t bring any performance increase anymore. When using two graphics cards, the limit shifts a bit higher and more CPU power is needed to fully utilize the performance of the two GPUs. In other words: one or more HighEnd graphics cards are only useful in Resolve if the processor is strong enough. Another insight: Fusion doesn&t seem to benefit from multiple GPUs in Resolve.
For the test in Resolve 18.104.22.168 different (UltraHD) 4K, 6K and 8K source material was used in the formats H.264, DNxHR HQ, ProRes, XAVC, Blackmagic RAW and R3D. If you are particularly interested in the speed of Resolve with any of these formats due to your own workflow and camera equipment, you can read in Puget&s detailed benchmark tables how much its performance varies with different CPUs.