Summary: It does 4K but I am getting some judder (studdering). This may not be the cards fault so YMMV. However for 1080p it is flawless and have not had any driver issues or other problems using this on my HTPC.
Summary: If the listing for this card had been accurate, I probably would have given this card four stars. On the other hand, I wouldn't have ordered it, so I actually wouldn't have given it any stars. As currently described (I've reported the error to Amazon customer service), this card is described as having GDDR3 memory. In fact, it only has DDR3 memory, which is significantly slower.
Summary: TL;DR: Do not buy this video card for an HTPC! I bought this video card to power an HTPC I had pieced together out of several older parts. Specifically, I bought it to replace an AMD Radeon 6570 whose fan was making an obnoxious amount of noise. The video card performed admirably in the (admittedly casual) video games I threw at it, but I kept noticing a weird issue where the audio would cut out, become distorted, and desync slightly whenever I would watch Netflix,...
Summary: The card itself came in great packaging, the box held it firm and it was well protected. Note to anybody who is thinking about getting this: Make sure that you have a power supply of at least 350 W, otherwise it won't work for you.
Summary: I bought this card for a HTPC I was assembling with older parts. The card worked well enough. High definition video and light gaming were no problem. This machine is CPU-limited in these applications anyway, so I have no doubt the card can perform at a higher level than the paces I put it through. The fanless cooler was the real selling point, as I wanted a quiet card (it's silent, obviously). It does a good job staying cool.