NVLink = Huge Multi-GPU Upgrade
Before the previous-gen Pascal architecture, NVIDIA GPUs used a single Multiple Input/Output (MIO) interface as the SLI Bridge technology, which allowed the second/third/fourth GPU to transfer its final rendered frame output to the primary GPU that was physically connected to the bridge.
Pascal changed this with a faster dual-MIO interface that arrived as HB-SLI, increasing the bandwidth between the GPUs. This paved the way for higher resolution output, and multiple high-res monitors to be used in NVIDIA Surround. NVLink takes all of this to the next level.NVIDIA has deployed its new multi-GPU technology NVLink into the new GeForce RTX 20 series, but NVLink is not something new for the company as it has used the high-speed interconnect on its Quadro RTX series cards and was made specifically for the Volta GV100 GPU.
TU102 features two NVLink 8x links that can feed out 25GB/sec of bidirectional bandwidth, while total aggregate bidirectional bandwidth hits 100GB/sec.
NVIDIA's new Turing-based TU102 and TU104 GPUs now use NVLink for all SLI GPU-to-GPU data transfers, with the higher-end TU102 featuring two NVLink x8 links while TU104 has a single NVLink x8 link. Each individual link provides up to 50GB/sec of bidirectional bandwidth (25GB/sec per way) while the two links in TU102 push 100GB/sec in total (50GB/sec per way).
Turing GPUs only support 2-way SLI over NVLink, but 3-way and 4-way SLI configurations "are not supported".
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- Page 1 [Introduction]
- Page 2 [Turing: NVLink Multi-GPU Tech]
- Page 3 [Up Close: NVLink Bridge]
- Page 4 [Test System Specs]
- Page 5 [Benchmarks - Synthetic]
- Page 6 [Benchmarks - 1080p]
- Page 7 [Benchmarks - 1440p]
- Page 8 [Benchmarks - 3440x1440]
- Page 9 [Benchmarks - 4K]
- Page 10 [Power Consumption]
- Page 11 [Unlocked: 4K 120FPS Gaming]
- Page 12 [Should You Buy RTX 2080 Ti NVLink?]
- Page 13 [Final Thoughts]
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