I am configuring a new hp computer and I was wondering if I should get 802.11ac network card that is 1x1 or if I should get a 802.11n network card that is 2x2. I am on an ac network. So the ac card should have a maximum theoretical performance of 433mbps, which is far above what I get now. The 1x1 stands for input and output streams, so the ac card will only have 1 input stream and 1 output stream, but the streams are 80mhz wide on the ac and the n has 2 40mhz wide streams. So, a few questions:

- Is all of the information above accurate or have I been misinformed?
- Will there be a network stability issue with only 1 input and 1 output stream?
- With the ac card, on a n network(if I go somewhere), will I only get a maximum theoretical performance of 150mbps?
- If I'm not mistaken, ac card will be faster on an ac network(433mbps on ac, 150mbps on n), but the n will be faster on a n network(300mbps on ac, 300 mbps on n). Is this true?
- I'm assuming that on an n network, only half of the 80mhz stream will be used?

So the main question I want to ask is which is better for ac network, which is better for n network, which is better for older types of internet(a/b/g), and which will be the most reliable?