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
Tesla K40m
CORE STATE
GK110B
VRAM
12 GB
CLOCK SPEED
876 MHz
TDP
245 W
BUS WIDTH
384 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_metal
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
GTX 660
Tesla K40m
Core Specs
Shading Units
960
2,880
+200.0%
Shaders
960
2,880
+200.0%
TMUs
80
240
+200.0%
ROPs
24
48
+100.0%
Clocks
Base Clock
980 MHz
745 MHz
Boost Clock
1032 MHz
876 MHz
Memory Clock
1502 MHz
6 Gbps effective
1502 MHz
6 Gbps effective
Memory
Memory Size
2 GB
12 GB
VRAM (MB)
2,048
12,288
+500.0%
Memory Type
GDDR5
GDDR5
Memory Bus
192 bit
384 bit
Bandwidth
144.2 GB/s
288.4 GB/s
Cache
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
384 KB
1536 KB
Performance
Pixel Rate
20.64 GPixel/s
52.56 GPixel/s
Texture Rate
82.56 GTexel/s
210.2 GTexel/s
FP32 (TFLOPS)
1.981 TFLOPS
5.046 TFLOPS
FP64 (TFLOPS)
82.56 GFLOPS (1:24)
1.682 TFLOPS (1:3)
Power
TDP
140 W
245 W
TDP (W)
140
245
+75.0%
Suggested PSU
300 W
550 W
Power Connectors
1x 6-pin
—
Architecture
Architecture
Kepler
Kepler
GPU Name
GK106
GK110B
Generation
GeForce 600
Tesla Kepler
(Kxx)
Process Size
28 nm
28 nm
Transistors
2,540 million
7,080 million
Die Size
221 mm²
561 mm²
Foundry
TSMC
TSMC
Density
11.5M / mm²
12.6M / mm²
API Support
DirectX
12 (11_0)
12 (11_1)
OpenGL
4.6
4.6
Vulkan
1.2.175
1.2.175
OpenCL
3.0
3.0
CUDA
3.0
3.5
Shader Model
6.5 (5.1)
6.5 (5.1)
Physical
Slot Width
Dual-slot
Dual-slot
Length
241 mm
9.5 inches
267 mm
10.5 inches
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Other
Launch Price
229 USD
7,699 USD
Production
End-of-life
End-of-life
Predecessor
GeForce 500
Tesla Fermi
Successor
GeForce 700
Tesla Maxwell