September 24, 2023

One of the best graphics playing cards aren’t only for taking part in video games. Synthetic intelligence coaching and inference, skilled purposes, video encoding and decoding can all profit from having a greater GPU. Sure, video games nonetheless get essentially the most consideration, however we like to take a look at the opposite elements as properly. Right here we’ll focus particularly on the video encoding efficiency and high quality you could count on from numerous generations of GPU.

Typically talking, the video encoding/decoding blocks for every era of GPU will all carry out the identical, with minor variance relying on clock speeds for the video block. We have checked the RTX 3090 Ti and RTX 3050 for instance — the quickest and slowest GPUs from Nvidia’s Ampere RTX 30-series era — and located successfully no distinction. Fortunately, that leaves us with fewer GPUs to take a look at than would in any other case be required.

We’ll check Nvidia’s RTX 4090, RTX 3090, and GTX 1650 from crew inexperienced, which covers the Ada Lovelace, Turing/Ampere (functionally similar), and Pascal-era video encoders. For Intel, we’re taking a look at desktop GPUs, with the Arc A770 in addition to the built-in UHD 770. AMD finally ends up with the widest unfold, at the least when it comes to speeds, so we ended up testing the RX 7900 XTX, RX 6900 XT, RX 5700 XT, RX Vega 56, and RX 590. We additionally wished to test how the GPU encoders fare towards CPU-based software program encoding, and for this we used the Core i9-12900K and Core i9-13900K.

Replace 3/09/2013: The preliminary VMAF scores had been calculated backward, which means we used the “distorted” video because the “reference” video, and vice versa. This, for sure, led to a lot increased VMAF scores than meant! We’ve since recalculated all the VMAF scores. Should you’re questioning, that is tremendous computationally intensive and takes about half-hour per GPU on a Core i9-13900K.

The excellent news is that our charts are corrected now. The unhealthy information (in addition to the initially incorrect outcomes being revealed) is that we killed off the preliminary torrent file and are updating with a brand new file that features the logs from the brand new VMAF calculations. Additionally, scores obtained decrease, so for those who had been pondering 4K 60 fps encodes at 16Mbps would principally match the unique high quality, that is solely selectively the case (relying on the supply video).

Video Encoding Take a look at Setup

Most of our testing was accomplished utilizing the identical {hardware} we use for our newest graphics card opinions, however we additionally ran the CPU check on the 12900K PC that powers our 2022 GPU benchmarks hierarchy. As a extra strenuous CPU encoding check, we additionally ran the 13900K with a higher-quality encoding preset, however extra on that in a second.