My laptop usually gets 1MB/s download speeds. Downloading the same file on my desktop only yields about 500kbs-700kbs. My motherboard came with "a dual band 2.4/5 GHz Wi-Fi 802.11 a/b/g/n" (Maximus V Formula). It also came with two white antenna things that I already installed. Is the decrease in speed normal or did I do something wrong?