Dear Forum members,
I recently bought an RX 470 and, using the Sony Red Car Benchmark material, measured the rendering speed on Sony AVC and MainConcept encoders, of which results in the attachment. My CPU (Intel i7 6700K) has an integrated GPU (HD530) and its QSV was also tested this time: Case 1 is where RX 470 is designated for Timeline and then rendered on the Sony AVC as well as MainConcept AVC encoders with RX470 or QSV. Case 2 is where QSV is designated for Timeline and rendered on the Sony AVC and Mainconcept AVC encoders with RX470 or QSV in the same manner. For comparison, as Case 3, I did the same test with CPU only. Each test is done twice and the average of the two is shown.
In my environment (my setup below), a few observations:
1. As has been reiterated a number of times here in this forum, there was little gain in rendering speed on MainConcept AVC with a modern GPU like RX 470. (My HD6870, in fact, did much better than this even on a lower- profile PC.)
2. Sony AVC render gained only a little bit if QSV is set for Timeline and RX 470 in encode mode ("Render using GPU if available"), but not the other way around.
3. QSV does NOT work for render on 1080 resolution spitting an error ("Intel QuickSync video is not available"). Only 720 resolution works but it's blazingly fast (>100fps).
To my surprise, the use of RX 470 yielded the best with MainConcept MPEG2 for Blu-ray (not GPU acceleratable format, tho'). I use Sony AVC and MC MPEG2 formats most of the time hence am deciding to continue using RX470. I do hope that MAGIX would speed up the development to deal with modern GPUs, including the QSV, soon. Oh, before I forget, in terms of timeline preview performance on the Sony Red Car benchmark, 29.97fps was kept in all the Cases 1-3.
Mobo: Gigabyte GA-Z170N-Wifi
CPU: Intel i7 6700K 4GHz with a Corsair H60 Liquid Cooler
GPU: Sapphire Nitro RX 470 4GB
SSD: Sun Disk 480GB
HDD: Seagate 4TB 7200 rps
OS: Windows 10 Pro
GPU Driver: AMD Radeon 21.19.407.0 (12/23/2016)
VEGAS Pro 14 ("VP14): Build 211
Lastly, if RX 470 is used for timeline, VP14 fails to load some projects files with a set of 4K footage from Sony AX100, Panasonic GH4 as well as WX970M always ending up with an unmanaged exception error. Although I am not entirely certain at this stage whether or not the complexity of projects is the culprit, as is presented above, small project files such as the Sony benchmark seem to be loaded without an issue. To make the matter clearer, if QSV is used (or disable GPU completely) for timeline, VP14 loads the problematic 4K project files without any issue. I did not have this problem even on my prior lower-profile PC (i7 3770, 32GB, HD6870) and am assuming that the problem is related to the GPU driver. If anyone can give me advice on the fix, I would highly appreciate as I intend to use RX 470 for timeline. Thank you for you help in advance.