How to pair two graphics cards?

Hey everyone, sorry if I'm posting this in the wrong section!

So, a relative left me an old graphics card (NVIDIA GeForce GTX 1650, 4GB, GDDR5). I've been running an NVIDIA GeForce GTX 970 4GB GDDR5 at home for about four years now, and I was wondering—since selling the extra card won't really net me much cash—is there any point in trying to run both at once? Is it even physically possible to pair them up so they actually work together? If it is, what does that process actually look like?

I don't have any real experience here. My knowledge of GPUs is probably no better than the average person who just bought a pre-built PC once, so please bear with me if this sounds like a rookie question...

In case anyone needs my specs to answer:
Intel Core i7 (8M Cache, 3.40 GHz) on an ASUS Intel 1150 Socket B85 motherboard.

Best regards and thanks in advance!

It’s technically possible, but you can't mix and match cards from different generations. There's a technology called SLI for NVIDIA or Crossfire for AMD—you might want to look that up if you're curious—but in your specific situation, it just won't work. 🙂

At the end of the day, NVIDIA didn't really bother supporting SLI on anything less than an NVIDIA GeForce RTX 3080 in that 10th generation lineup.

Sure, there’s that theoretical scheme in DirectX 12 where you can run two different GPUs together, but honestly, we’re just splitting hairs at that point. Support for multi-GPU via DirectX 12—just like official SLI or Crossfire—is practically non-existent or performs terribly. The whole concept is basically dead. Just sell that NVIDIA GeForce GTX 1650 and call it a day.

Too bad. No matter. Thanks anyway, everyone—you guys were a huge help! 🙂

+1 to you for selling the graphics card... I'd much rather have one solid performer than two mediocre ones taking up space.