The new Vapor-X cooled HD 4890 works at reference clocks of 850MHz for the GPU and 3,900MHz for 1GB of GDDR5 memory. It has 800 Stream processors, a 256-bit memory interface and a rather interesting choice of output ports. In addition to the DVI, D-Sub and HDMI outputs, Sapphire has decided to include a DisplayPort output as well.

They also discuss the Powercolor Radeon HD 4730.

It looks like there won't be any GDDR3 version of RV740, ATI's first 40nm card. PowerColor has already told us that it plans to launch Radeon HD 4730 card clocked at 700Mz core and with GDDR5 memory. It is not clear at this point, but 4730 might be even based on 55nm RV770LE chip.