I'm long overdue an upgrade from my Z77 setup, I'm looking to go to an X570 setup with a Ryzen 7 3700x, however I currently have a GTX 970, which is fine, but I'd like the option to SLI it in the near future if I can pick up a matching card for cheap.
The problem with this is that I'm struggling to find out whether I can SLI on a PCIe 4.0 board that has a second slot that runs at PCIe 3.0. This is the board I've been looking at but I keep finding conflicting information online as to it's support.
Can anyone confirm whether I can SLI 970s on this board, and if not link me to an X570 board that will?
Thanks,
GEFORCE RTX NVLINK™ BRIDGE Connect two NVLink SLI-ready graphics cards with 50X the transfer bandwidth of previous technologies. You can count on super-smooth gameplay at maximum resolutions with ultimate visual fidelity in GeForce RTX 2080 Ti, 2080 SUPER, 2080, and 2070 SUPER graphics cards. $79.99 MSRP. SELECT BRIDGE SIZE 3 SLOT. High-Bandwidth Bridge or SLI HB Bridge (650 MHz Pixel Clock and 2GB/s Bandwidth) – This is the fastest bridge and is sold exclusively by Nvidia. It’s recommended for monitors up to 5K and surround. SLI HB Bridges are only available in 2-way configurations. For example I am going to use GeForce GTX 580 MATRIX 1.5GB and 580GTX DirectCU II 1.5GB in SLI. As long as they are both GeForce GTX 580 cards with the same memory capacity I will be able to use them in SLI configuration.

Next up, the PCB is shorter than the card itself, and NVIDIA's unique new reference-cooler makes the card about 50% longer than its PCB. NVIDIA listened to feedback about shorter PCBs pushing power connectors towards the middle of the cards; and innovated a unique design, in which the card's sole 6-pin PCIe power connector is located where you want it (towards the end), and internal high-current wires are soldered to the PCB. Neato? Think again. What if you want to change the cooler, or maybe use a water-block? Prepare to deal with six insulated wires sticking out of somewhere in the PCB, and running into that PCIe power receptacle. The rear PCB shot also seems to confirm the 192-bit memory bus, given how some memory chip pads are blanked out by lacking SMT components needed by the memory chip.
Nvidia Geforce Gtx Sli Hb Bridge 3-slot
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