AMD Radeon HD 8970M 's Advantages
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (153.6GB/s vs 14.40GB/s)
1024 additional rendering cores
NVIDIA GeForce 830A 's Advantages
Released 1 years and 2 months late
Boost Clock has increased by 28% (1150MHz vs 900MHz)
Lower TDP (33W vs 100W)