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NVIDIA GeForce RTX 2070 Review: The Perfect Card For 1440p (Page 6)

By Anthony Garreffa from Oct 16, 2018 @ 8:00 CDT
TweakTown Rating: 96%Manufacturer: NVIDIA

No NVLink Love On RTX 2070

There is no NVLink connector on the GeForce RTX 2070, but that doesn't mean you shouldn't know about it. Here's what to expect from NVLink with the RTX 2080 and RTX 2080 Ti graphics cards.

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.

nvidia-geforce-rtx-2070-review-gtx-1080-ti-perf_18

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-geforce-rtx-2070-review-gtx-1080-ti-perf_245

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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