NVIDIA Tesla K20m vs NVIDIA GeForce GTX 660
GPU · Specs Compare
Graphics Card
Release Date
Jan 2013
Sep 2012
Generation
Tesla
GeForce 600
Type
Professional
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1300 MHz
1502 MHz
Base Clock
—
980 MHz
Boost Clock
—
1032 MHz
Memory
Memory Size
5GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
320bit
192bit
Bandwidth
208.0GB/s
144.2GB/s
Render Config
Shading Units
2496
960
TMUs
208
80
ROPs
40
24
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
1280 KB
384 KB
Theoretical Performance
Pixel Rate
36.71 GPixel/s
20.64 GPixel/s
Texture Rate
146.8 GTexel/s
82.56 GTexel/s
FP32 (float)
3.524 TFLOPS
1.981 TFLOPS
FP64 (double)
1175 GFLOPS
82.56 GFLOPS
Graphics Processor
GPU Name
GK110
GK106
Architecture
Kepler
Kepler
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
7.08 billion
2.54 billion
Die Size
561 mm²
221 mm²
GPU Variant
—
GK106-400-A1
Board Design
TDP
225W
140W
Suggested PSU
550 W
300 W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 6-pin + 1x 8-pin
1x 6-pin
Graphics Features
DirectX
12 (11_0)
12 (11_0)
OpenGL
4.6
4.6
OpenCL
3.0
3.0
Vulkan
1.1
1.1
CUDA
3.5
3.0
Shader Model
5.1
5.1
Benchmark
3DMark Time Spy
—
1,194
3DMark Time Spy Extreme
—
260
OctaneBench
—
27
Blender
—
111
▲ Specs Compare
Data sourced from official specifications and benchmark tests.