According to our sources, ATI's 40nm RV740 card with GDDR3 memory, also known as the HD 4750, at least for now, will have a PCI-Express connector. As we wrote before, ATI's HD 4770, or the GDDR5 equipped RV740 barely needs one, as its maximum board power consumption is rated at 80W.

As you know the GDDR3 memory needs 1.8V to 2.0V depending on the clock that you want to achieve, and even the fact that HD 4750 will have lower clocks than the HD 4770, doesn't change the fact that it will need a PCI-Express power connector. The GDDR5 memory on the other hand needs 1.5V in most cases.

Even if the lower clock pulls down the maximum board power consumption below those magical 75 Watts that PCI-Express slot can deliver, our source noted that AMD will still put a PCI-Express power connector just to stay on the safe side. This means that you will need a PCI-Express power connector on your PSU, that most of the new PSUs does come with, or at least two free "molex" plugs to use with an adapter, and the card will still have an impressively low power consumption.

The HD 4770 comes in May, and AMD is keeping quiet about the cheaper and slower HD 4750, but the name has been mentioned to us on several occasions, so the card is at least planned.