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
Tesla K20m
CORE STATE
GK110
VRAM
5 GB
CLOCK SPEED
—
TDP
225 W
BUS WIDTH
320 bit
ARCHITECTURE
Kepler
PROCESS
28 nm
LAUNCH DATE
2013
PERFORMANCE BENCHMARKS
geekbench_opencl
geekbench_vulkan
DETAILED SPECIFICATIONS
SPECIFICATION
GTX 660 Ti
Tesla K20m
Core Specs
Shading Units
1,344
2,496
+85.7%
Shaders
1,344
2,496
+85.7%
TMUs
112
208
+85.7%
ROPs
24
40
+66.7%
Clocks
Base Clock
915 MHz
—
Boost Clock
980 MHz
—
GPU Clock
—
706 MHz
Memory Clock
1502 MHz
6 Gbps effective
1300 MHz
5.2 Gbps effective
Memory
Memory Size
2 GB
5 GB
VRAM (MB)
2,048
5,120
+150.0%
Memory Type
GDDR5
GDDR5
Memory Bus
192 bit
320 bit
Bandwidth
144.2 GB/s
208.0 GB/s
Cache
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
384 KB
1280 KB
Performance
Pixel Rate
27.44 GPixel/s
36.71 GPixel/s
Texture Rate
109.8 GTexel/s
146.8 GTexel/s
FP32 (TFLOPS)
2.634 TFLOPS
3.524 TFLOPS
FP64 (TFLOPS)
109.8 GFLOPS (1:24)
1,174.8 GFLOPS (1:3)
Power
TDP
150 W
225 W
TDP (W)
150
225
+50.0%
Suggested PSU
450 W
550 W
Power Connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Architecture
Architecture
Kepler
Kepler
GPU Name
GK104
GK110
Generation
GeForce 600
Tesla Kepler
(Kxx)
Process Size
28 nm
28 nm
Transistors
3,540 million
7,080 million
Die Size
294 mm²
561 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
1.2.175
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 2.0 x16
Other
Launch Price
299 USD
3,199 USD
Production
End-of-life
End-of-life
Predecessor
GeForce 500
Tesla Fermi
Successor
GeForce 700
Tesla Maxwell