I have 6 SATA connectors on my mb. If I connect 1 device per connector, Device Manager will not show 1 device per channel. It will show multiple devices on some channels and on other channels there will be nothing at all. So evidently each connector does not mean one channel as I thought it did. I had 6 SATA connectors so thought I had 6 channels but it's not quite that way. Apparently other factors are in place that decide which devices are on which channels regardless of which SATA connectors they are connected to. I've experimented with moving devices around the SATA connectors (trying to get 1 device on 1 channel) and the results are confusing cause the channels move differently than the devices moved on the connectors. Perhaps someone with more knowledge than me on this subject can't shed some light on my dumb ass.