That is basically what Elbox said, plus that the TX should be faster with gfx cards.
The thing is that Elbox is not really a reliable company in ethics terms, so their claims are not actually valuable in the technical field.
Do you remember when they told users they should upgrade from the Spider USB PCI card to the Spider II to obtain more speed? The end result, was a system working at the exact same speed as before and this was verified by numerous comunity unbias benchmarks. Probably was that they run out of their first batch of Nec USB cards and had to buy another one which was slightly different in design but performed just the same.
So really, the question still remains to be answered.
