GPU Comparison
GEFORCE
NVIDIA GeForce GTX 660
CORE STATE
GK106
VRAM
2 GB
CLOCK SPEED
1032 MHz
TDP
140 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2012
VS
GEFORCE
GeForce GTX 870M
CORE STATE
GK104
VRAM
3 GB
CLOCK SPEED
967 MHz
TDP
100 W
BUS WIDTH
192 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2014
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
GTX 660
GTX 870M
Core Specs
Shading Units
960
1,344
+40.0%
Shaders
960
1,344
+40.0%
TMUs
80
112
+40.0%
ROPs
24
24
0.0%
Clocks
Base Clock
980 MHz
941 MHz
Boost Clock
1032 MHz
967 MHz
Memory Clock
1502 MHz
6 Gbps effective
1250 MHz
5 Gbps effective
Memory
Memory Size
2 GB
3 GB
VRAM (MB)
2,048
3,072
+50.0%
Memory Type
GDDR5
GDDR5
Memory Bus
192 bit
192 bit
Bandwidth
144.2 GB/s
120.0 GB/s
Cache
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
384 KB
384 KB
Performance
Pixel Rate
20.64 GPixel/s
27.08 GPixel/s
Texture Rate
82.56 GTexel/s
108.3 GTexel/s
FP32 (TFLOPS)
1.981 TFLOPS
2.599 TFLOPS
FP64 (TFLOPS)
82.56 GFLOPS (1:24)
108.3 GFLOPS (1:24)
Power
TDP
140 W
100 W
TDP (W)
140
100
-28.6%
Suggested PSU
300 W
—
Power Connectors
1x 6-pin
None
Architecture
Architecture
Kepler
Kepler
GPU Name
GK106
GK104
Generation
GeForce 600
GeForce 800M
Process Size
28 nm
28 nm
Transistors
2,540 million
3,540 million
Die Size
221 mm²
294 mm²
Foundry
TSMC
TSMC
Density
11.5M / mm²
12.0M / mm²
API Support
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
Vulkan
1.2.175
1.2.175
OpenCL
3.0
3.0
CUDA
3.0
3.0
Shader Model
6.5 (5.1)
6.5 (5.1)
Physical
Slot Width
Dual-slot
MXM Module
Length
241 mm
9.5 inches
—
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Portable Device Dependent
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Other
Launch Price
229 USD
—
Production
End-of-life
End-of-life
Predecessor
GeForce 500
GeForce 700M
Successor
GeForce 700
GeForce 900M