Anyone have experience with PCI-X bus controllers?

My PCI-X bus controller is acting up on my motherboard. It’s an old setup, but honestly, I’m running an i7-3770K build that still packs enough punch for what I need—I really have no reason to go through the headache of swapping everything out right now...
I’m looking at picking up this specific controller I spotted over at Best Buy. But here’s the catch—I’ve been digging around online and seeing people talk about how some motherboards just flat-out refuse to recognize these controllers, especially when you're looking at the budget-friendly options. And if I end up with one of those "cheap" versions that doesn't work, I'm basically throwing $50 down the drain.
It’s already such a pain to even find this kind of hardware in the States, and my options are pretty much shot because I'm not touching PCI slots—my Windows installation is sitting on an SSD, so that's non-negotiable.

So, realistically speaking, what am I actually signing up for if I pull the trigger on this?

If you aren't looking to overhaul your entire setup, I'd honestly suggest checking Craigslist for a used motherboard instead—it probably makes more sense to shell out $67 a bit extra for a solid board than to sink that money into a controller.

I’ve actually chewed on that idea before, but I ended up passing on it for a whole bunch of reasons... Most of them only come with two memory slots, which just isn't enough for me. And the rest? Well, after doing some digging online, their build quality looks pretty questionable at best.
Sure, you might stumble upon a high-end board every once in a while, but they always come with a ridiculous price tag attached. Not to mention the fact that everything out there is used—no warranty, no safety net, nothing.

So, what motherboard are we talking about here? If it's one of those high-end models, they might actually have two controllers built in, so maybe double-check that...

It’s not even a top-tier board. Intel.

They basically screw you over on the first two high-speed ports—that's where the real trouble is. The rest seem fine for now, but honestly, I'm just wondering how long they'll actually hold up... I've already got 2x HDDs and 2x SSDs running on this thing.

You mean PCIe? Where on earth would you even find a PCI-X bus controller these days?

Mine came with its own installation CD. It runs a bit weirdly—it actually has its own pre-BIOS splash screen—but it gets the job done.

If you order it online, you can always just return whatever you get within a 14-day window.

Yeah, it's PCI-E. My bad... totally slipped my mind.
I don't even have a DVD drive anymore—modern life, right?—so I'm going to have to hunt down the files online and burn a bootable USB stick.
Actually, you kind of answered my next question about the rollback process while you were at it. 👍

Were you able to just keep using your existing macOS installation, or did you have to go through the whole headache of a clean reinstall?

What’s even the point of swapping them if the other four are still working fine? I guess the speed difference wouldn't be huge enough to actually notice, and you'll just end up blowing cash and losing your mind...

What’s even the point of swapping them if the other four are still working? I guess the speed difference wouldn't be massive enough to actually notice, and you'll just end up blowing a bunch of cash and losing your mind over it...

The way those first two ports are acting up looks like a warning sign—like this mess might just spread to the rest of the slots. But honestly, I don't even see a point in trying, because the "geniuses" over at Gigabyte laid out the PCI Express lanes in the most ridiculous way possible... they positioned them so one graphics card completely hogs the space, leaving just enough room for the second slot to be practically unreachable. Even if I actually managed to jam a card in there, it would basically be suffocating against the GPU fan...