GPU Comparison
GEFORCE
NVIDIA GeForce GTX 660 Ti
CORE STATE
GK104
VRAM
2 GB
CLOCK SPEED
980 MHz
TDP
150 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
VS
GEFORCE
Quadro K620
CORE STATE
GM107
VRAM
2 GB
CLOCK SPEED
1124 MHz
TDP
45 W
BUS WIDTH
128 bit
ARCHITECTURE
Maxwell
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
GTX 660 Ti
Quadro K620
Core Specs
Shading Units
1,344
384
-71.4%
Shaders
1,344
384
-71.4%
TMUs
112
24
-78.6%
ROPs
24
16
-33.3%
Clocks
Base Clock
915 MHz
1058 MHz
Boost Clock
980 MHz
1124 MHz
Memory Clock
1502 MHz
6 Gbps effective
900 MHz
1800 Mbps effective
Memory
Memory Size
2 GB
2 GB
VRAM (MB)
2,048
2,048
0.0%
Memory Type
GDDR5
DDR3
Memory Bus
192 bit
128 bit
Bandwidth
144.2 GB/s
28.80 GB/s
Cache
L1 Cache
16 KB (per SMX)
64 KB (per SMM)
L2 Cache
384 KB
2 MB
Performance
Pixel Rate
27.44 GPixel/s
17.98 GPixel/s
Texture Rate
109.8 GTexel/s
26.98 GTexel/s
FP32 (TFLOPS)
2.634 TFLOPS
863.2 GFLOPS
FP64 (TFLOPS)
109.8 GFLOPS (1:24)
26.98 GFLOPS (1:32)
Power
TDP
150 W
45 W
TDP (W)
150
45
-70.0%
Suggested PSU
450 W
200 W
Power Connectors
2x 6-pin
None
Architecture
Architecture
Kepler
Maxwell
GPU Name
GK104
GM107
Generation
GeForce 600
Quadro Kepler
(Kx200)
Process Size
28 nm
28 nm
Transistors
3,540 million
1,870 million
Die Size
294 mm²
148 mm²
Foundry
TSMC
TSMC
Density
12.0M / mm²
12.6M / mm²
API Support
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.175
1.4
OpenCL
3.0
3.0
CUDA
3.0
5.0
Shader Model
6.5 (5.1)
6.7 (5.1)
Physical
Slot Width
Dual-slot
Single-slot
Length
241 mm
9.5 inches
160 mm
6.3 inches
Height
—
69 mm
2.7 inches
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x DisplayPort 1.2
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Other
Launch Price
299 USD
—
Production
End-of-life
End-of-life
Predecessor
GeForce 500
Quadro Fermi
Successor
GeForce 700
Quadro Maxwell