PNY Video Card VCNVS810DVI-PB Chipset: NVIDIA NVS 810 Video Memory: 4GB GDDR3 (2GB per GPU) Memory Interface: 128-bit (64-bit per GPU) Memory Bandwidth: 28.8 GB/s Bus: PCI-Express 3.0 x16 CUDA Cores: 1024 (512 per GPU)