After some search job, I found the HD 4600 “leak” photo is fake.

First of all, let’s compare The “HD 4600″ and reference HD 3650:

The “HD 4600″, looks quite real with effects “to protect sources”.

HD 3650, you can search for more

Looks the same, huh? Some of you may say, maybe RV735 is pin-to-pin to RV635. But if you can check out the marks on capacitors, you will see the “HD 4600″ looks the same with this one:

 The pic is from a HD 3650 coverage in chinese dated Jan 18th right here.

So it is clear now, HD 3650 and “HD 4600″ is the exactly  the same card.