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Old 20th September 2019, 15:39   #57447  |  Link
Klaus1189
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Join Date: Feb 2015
Location: Bavaria
Posts: 1,666
Quote:
Originally Posted by huhn View Post
it's currently not working properly.

PCIe 3.0 can barely do UHD60 and PCIe 4.0 interface is only double the speed so it shouldn't be able to do FUHD60.

so PCIe 2.0 is already a bottleneck that's where native hardware decoding comes into the mix and that doesn't care even PCIe 1.0 is a total over kill for that.
I don't understand why it PCIe 3.0 or PCIe 2.0 are a bottleneck for that pupose.
HDMI 2.1 is capable of 48 GBit/s which is about 6 GByte/s -> sufficient for 8K 60fps but with DSC Video compression
PCIe 2.0 is about 8 GByte/s for 16 Lanes
PCIe 3.0 is about 15,x GByte/s for 16 Lanes -> sufficient for uncompressed 8K 60fps 10 bit 4:4:4 (11,2 GByte/s needed)
PCIe 4.0 is about 31,x GByte/s for 16 Lanes -> sufficient for uncompressed 8K 60fps 10 bit 4:4:4 (11,2 GByte/s needed)

But only if you have a Mainboard which has full 16 Lanes on the PCIe slot.
Some Mainboards use full size slot but only half of the pins is physically there. This can be an issue.
Here is a calculator of uncompressed videostream sizes per second: https://www.extron.de/product/videotools.aspx

Note:
Bit vs. Byte
Number of PCIe Lanes: 1 / 4 / 8 / 16
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