I was a bit worried when I bought it because of the negative reviews on this and other websites. But it turns out to be a great little card. I need this for its internal USB 3.0 connector block as I need two 3.0 headers and my motherboard only has one. I'm running Windows 8.1 x64 on an Asus Maximus VI Formula motherboard. I plugged in the card and turned on the computer and the card was immediately recognized and the drivers loaded. I didn't have to download drivers anywhere. I didn't have to download the drivers from the CD that came with it. I didn't have to adjust anything. It just worked. All my USB devices are recognized and appear as soon as I plug them in. I haven't run any performance tests, but I have a feeling they run fast. But come on guys. Most of the time we are talking about small portable USB drives, cameras or whatever. I'm not saying it's not fast, but if the card wasn't the fastest of them all, who cares. It's compatible, quick and easy to use, and costs around $20. I recommend this card.
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