Video cards for PC 600 series NVIDIA GeForce: GT 620, GTX 690, etc.

GEFORCE GTX 690
GPU Architecture: Kepler
GPU Model: 2×GK104-400
CUDA Cores: 1920
Base Clock speed (BOOST): 915 MHz (1019 MHz)
Memory speed: 6 Gbit/s
Memory: 4 Gb GDDR5 (512-bit)

GEFORCE GTX 680
GPU Architecture: Kepler
GPU Model: GK104-400
CUDA Cores: 1536
Base Clock Frequency (BOOST): 1006 MHz (1058 MHz)
Memory speed: 6 Gbit/s
Memory: 2 Gb GDDR5 (256-bit)

GEFORCE GTX 670
GPU Architecture: Kepler
GPU Model: GK104-325
CUDA Cores: 1344
Base Clock speed (BOOST): 915 MHz (980 MHz)
Memory speed: 6 Gbit/s
Memory: 2 Gb GDDR5 (256-bit)

GEFORCE GTX 660 TI
GPU Architecture: Kepler
GPU Model: GK104-300
CUDA Cores: 1344
Base Clock speed (BOOST): 915 MHz (980 MHz)
Memory speed: 6 Gbit/s
Memory: 2 Gb GDDR5 (192-bit)

GEFORCE GTX 660
GPU Architecture: Kepler
GPU Model: GK106-400
CUDA Cores: 960
Base Clock speed (BOOST): 980 MHz (1033 MHz)
Memory speed: 6 Gbit/s
Memory: 2 Gb GDDR5 (192-bit)

GEFORCE GTX 650 TI BOOST
GPU Architecture: Kepler
GPU Model: GK106-240
CUDA Cores: 768
Base Clock speed (BOOST): 980 MHz (1033 MHz)
Memory speed: 6 Gbit/s
Memory: 2 Gb GDDR5 (192-bit)

GEFORCE GTX 650 TI 
GPU Architecture: Kepler
GPU Model: GK106-220
CUDA Cores: 768
Base Clock speed (BOOST): 928 MHz
Memory performance: 5.4 Gbps
Memory: 1 Gb GDDR5 (128-bit)

GEFORCE GTX 650
GPU Architecture: Kepler
GPU Model: GK107-450
CUDA Cores: 384
Base Clock speed (BOOST): 1058 MHz
Memory speed: 5 Gbit/s
Memory: 1 Gb GDDR5 (128-bit)

GEFORCE GT 640 GDDR5
GPU Architecture: Kepler
GPU Model: GK208-400
CUDA Cores: 384
Base Clock frequency (BOOST): 1046 MHz
Memory speed: 5 Gbit/s
Memory: 1 Gb GDDR5 (64-bit)

GEFORCE GT 640
GPU Architecture: Kepler
GPU Model: GK107-300
CUDA Cores: 384
Base Clock speed (BOOST): 900 MHz
Memory performance: 1.8 Gbps
Memory: 2 Gb DDR3 (128-bit)

GEFORCE GT 630
GPU Architecture: Fermi
GPU Model: GF108-400 (GF108)
CUDA Cores: 192
Base Clock speed (BOOST): 875 MHz
Memory speed: 891 Mbps
Memory: 1 Gb DDR3 (128-bit)

GEFORCE GT 620
GPU Architecture: Fermi
GPU Model: GF108-100-KB (GF108)
CUDA Cores: 96
Base Clock speed (BOOST): 875 MHz
Memory speed: 898 Mbit/s
Memory: 1 Gb DDR3 (128-bit)