Radeon HD 7400M, 7500M and 7600M
Nvidia's Geforce 600M launch of rebranded Geforce 500M parts, AMD has also introduced its line of rebrands, the Radeon HD 7400M, HD 7500M and the HD 7600M series.
Since we are talking about rebrands, the HD 7400M is based on Caicos chip and it is basically the good old HD 6400M with 160 stream processors, 8 texture units and four ROPs. It will be using both GDDR5 and DDR3 memory paired up with a 64-bit memory interface.
The next in line are HD 7500M and the HD 7600M series based on the Turks GPU. Both feature 480 stream processors, 24 texture units and 8 ROPs. The only known difference between the Radeon HD 7500M and the HD 7600M series is the memory interface, 128-bit for the HD 7600M and 64-bit for the 7500M. Both will be using GDDR5 and DDR3 memory.
The precise clocks of the newely rebranded parts is unknown and there is a possibility of higher clocks but don't expect any miracles.
You can check out more over at Anandtech.com