What's New - NVLink, Turing Memory Compression & More
NVLink - NVLink is nothing new per se, but it's completely new on GeForce cards. Until now, NVLink has been exclusive to the Quadro and Tesla graphics cards, whereas SLI was the multi-GPU technology in previous-gen GeForce GTX graphics cards. NVIDIA has ended 3- and 4-way multi-GPU support on Turing, limiting gamers to just two graphics cards.
Turing Memory Compression - Pascal had some radical lossless compression techniques that drove the GeForce GTX 10 series, but Turing rides an entire new level of compression techniques with up to 50% increase in effective bandwidth over Pascal.
Video and Display Engine - Turing has some massive video engine chops, whereas 8K 60Hz is enabled with DisplayPort 1.4a on a single cable which is insane. Current GPUs can do 8K60 but they require 2 x DP connectors. The new display engine also packs improved NVENC encoder which can encode H.265 streams at 8K30, as well as a new NVDEC decoder that packs HEV YUV444 10/12b HDR, H.264 8K and VP9 10/12 HDR support. HEVC will enjoy up to 25% bitrate savings, while H.264 enjoys up to 15% bitrate savings.
8K (7680x4320) at 60Hz with HDR over single DisplayPort 1.4a
Not only can the single DP1.4a handle 8K60, it will do 8K 60FPS with HDR. Impressive stuff. There's also native HDR support with Tone Mapping HW and low latency. All of NVIDIA's new GeForce RTX 20 series graphics cards have VirtualLink connectors on the back with four dedicated lanes of HBR3 DisplayPort. There's also USB 3.1 Gen2 SuperSpeed and a huge 27W of power over the single USB-C connector.
This means that there's around 30W of power used within the TDP for VirtualLink, something we'll be experimenting with when next-gen VR headsets arrive in 2019 and beyond.
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