I have wondered about such cards ........ never owned one that I recall (today
) ....... and how they compare to some of the USB connected 'sticks' with tuners.
It is my understanding - which is likely wrong - that the card has decoding on board, while the USB sticks depend on the processing power of the PC to decode the signal for display.
I can see that as an advantage, particularly where underpowered PCs are involved.
On the other hand the USB sticks are portable, so can be easily swapped from one PC to another, or carried as an accessory for a laptop - something which no doubt is attractive to a lot of people.
One advantage of the USB stick - again as I understand it (where DTT is concerned in my case) - is that all the channels from a transponder are available to the OS, and thus all of them can be made available simultaneously enabling one to view one channel while recording another ......... or indeed play as many channels as the PC resources allow.
Another advantage is cost, of course. The internal cards are about 10x the price of a USB stick.
So, at this time, I have difficulty in finding a reason to insert an internal card into any PC as opposed to plugging in a USB stick for the purpose.
If anyone has further info on this comparison I would like to hear it, as I have no experience with the internal cards.