Memory Scaling on Ryzen 7 with Team Group's Night Hawk RGBby Ian Cutress & Gavin Bonshor on September 27, 2017 11:05 AM EST
CPU Performance, Short Form
Video Conversion – Handbrake v1.0.2: link
Video transcoding (both encode and decode) is a hot topic in performance metrics as more and more content is being created. First consideration is the standard in which the video is encoded, which can be lossless or lossy, trade performance for file-size, trade quality for file-size, or all of the above can increase encoding rates to help accelerate decoding rates. Alongside Google's favorite codec, VP9, there are two others that are taking hold: H264, the older codec, is practically everywhere and is designed to be optimized for 1080p video, and HEVC (or H265) that is aimed to provide the same quality as H264 but at a lower file-size (or better quality for the same size). HEVC is important as 4K is streamed over the air, meaning less bits need to be transferred for the same quality content.
Handbrake is a favored tool for transcoding, and so our test regime takes care of three areas.
Low Quality/Resolution H264: Here we transcode a 640x266 H264 rip of a 2 hour film, and change the encoding from Main profile to High profile, using the very-fast preset.
High Quality/Resolution H264: A similar test, but this time we take a ten-minute double 4K (3840x4320) file running at 60 Hz and transcode from Main to High, using the very-fast preset.
HEVC Test: Using the same video in HQ, we change the resolution and codec of the original video from 4K60 in H264 into 4K60 HEVC.
The biggest gains in Handbrake came in the HQ test where we gained up to an extra +21% in performance for DDR4-3333 over DDR4-2400. The fact that we don't see the same gains in the HEVC test is likely down to the algorithm.
Compression – WinRAR 5.40: link
Like with Handbrake, the system seemed to scale pretty well in WinRAR with a ~16% performance gain going from DDR4-2400 to DDR4-3333.
3D Movement Algorithm Test v2.1
Although more of a raw CPU benchmark, it shows here that memory isn’t a massive factor, as regardless of memory speed, we encountered marginal performance gains.
POV-Ray 3.7: link
POV-Ray might be a fruitful benchmark for testing memory stability, but our performance variation between memory speeds was within the margin of error.
7-Zip 9.2: link
Some compression tools can be susceptible to memory performance and it shows in our results such as WinRAR. 7-zip has a small performance boost as we rise up through the stack, although the differences above DDR4-2666 are fairly minimal.