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System: i7 6700 Skylake, 32 GB DDR4 ram, no overcloking, Nvidia GTX960, driver 359.06
System drive: SSD Samsung XP941, media drive: Seagate SSHD 4TB
OS: Windows 10 treshold 2
PD 14 with patch v2302
Task: rendering a short (about 4 min) UHD video in HEVC. (https://www.youtube.com/watch?v=SwfKwO-3KIo)
Both the intel GPU and NVIDIA GPU support HEVC encoding
Results
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First, the NVIDIA card was removed:
Hadrware optimization OFF:
TIme: 23:16 , CPU usage during transitions: 100% (92w) , CPU usage without transitions: 100% (92w)
Hadrware optimization ON -Intel GPU
TIme: 9:46 , CPU usage during transitions: 100% (92w) , CPU usage without transitions: about 70-80% (86 w)
Second , the NVIDIA card is placed in the PCIe slot:
Hadrware optimization ON
TIme: 7:00 , CPU usage during transitions: 100% (110w) , CPU usage without transitions: about 46% (NA w)
Third , the NVIDIA card is placed in the PCIe slot and the on board GPU is enabled in the BIOS
TIme: 7:04 , CPU usage during transitions: 100% (110w) , CPU usage without transitions: about 46% (NA w)
Conclusions
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For this project, the Nvidia card provides the fastest rendering (speedup factor = 3.3). The Skylake GPU comes second (speedup factor = .2.4).
The combination of both graphics cards did not bring further improvements and gave the same results as the NVIDIA card.
The problem that I don't know how to enable multi GPU acceleration. Or may be the internal GPU is always enabled/used? Asus Z170, i7 6700, 32GB DDR4, GTX1070
Win 10 pro
Samsung Galaxy Note 3
Samsung NX1