ATI Radeon 7790M
Manufacturer AMD
Codename Wimbledon XT
Architecture GCN
Pipelines 1280 - unified
Core Speed * 850 MHz
Shader Speed * 850 MHz
Memory Speed * 1200 MHz
Memory Bus Width 256 Bit
Memory Type GDDR5
Shared Memory no
DirectX DirectX 11.1, Shader 5.0
Current Consumption 100 Watt
technology 28 nm
Notebook Size large
Date of Announcement 01.05.2012
Nvidia Geforce 710M
Manufacturer NVIDIA
GeForce 700M Series
GeForce 710M 96@800MHz
Codename N14M-GL
Architecture Fermi
Pipelines 96 - unified
Core Speed * 800 MHz
Shader Speed * 800 MHz
Memory Speed * 900 MHz
Memory Bus Width 64 Bit
Memory Type DDR3
Max. Amount of Memory 2048 MB
Shared Memory no
DirectX DirectX 11, Shader 5.0
technology 28 nm
Features PhysX, Verde Drivers, CUDA, Play, Optimus, GPU Boost 2.0
Notebook Size medium sized
Date of Announcement 01.04.2013
NVIDIA GEFORCE 710M Battlefield3The graphics quality and performance in BF3 with the Nvidia 710M.
If that listing for the memory bus width for the 710M is correct, then the card is utterly hopeless and you are better off with the ATI.
That being said the 710M is a downgraded version of the 620M, which was also quite pointless.
Another thing is the 710M uses GDDR3 memory where as the 7790M uses GDDR5 which is a newer and faster technology.
At the end of the day if you want to be able to play SAMP, go for the 710M and you will have some lag.
If you want to play actual games then go for the ATI Radeon 7790M.
Simply put, the ATI 7790M outperforms the 710M in all categories.