NVIDIA GeForce GT 520 PCIe x1 's Advantages
More VRAM (1024GB vs 128GB)
Larger VRAM bandwidth (14.40GB/s vs 9.600GB/s)
32 additional rendering cores
Lower TDP (29W vs 50W)
NVIDIA GeForce 9400 GT Rev. 3 's Advantages
Released 1 years and 2 months late