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GPU Comparison
NVIDIA Tesla K20m vs NVIDIA Tesla K40d
NVIDIA Tesla K20m vs NVIDIA Tesla K40d
VS
NVIDIA Tesla K20m
NVIDIA Tesla K40d
We compared two Professional market GPUs: 5GB VRAM Tesla K20m and 12GB VRAM Tesla K40d to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA Tesla K20m 's Advantages
Lower TDP (225W vs 245W)
NVIDIA Tesla K40d 's Advantages
Released 10 months late
Boost Clock876MHz
More VRAM (12GB vs 5GB)
Larger VRAM bandwidth (288.4GB/s vs 208.0GB/s)
384 additional rendering cores
Score
Benchmark
FP32 (float)
Tesla K20m
3.524 TFLOPS
Tesla K40d
+43%
5.046 TFLOPS
Tesla K20m
VS
Tesla K40d
Graphics Card
Jan 2013
Release Date
Nov 2013
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
745 MHz
-
Boost Clock
876 MHz
1300 MHz
Memory Clock
1502 MHz
Memory
5GB
Memory Size
12GB
GDDR5
Memory Type
GDDR5
320bit
Memory Bus
384bit
208.0GB/s
Bandwidth
288.4GB/s
Render Config
-
-
-
-
-
-
2496
Shading Units
2880
208
TMUs
240
40
ROPs
48
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1280 KB
L2 Cache
1536 KB
-
-
-
Theoretical Performance
36.71 GPixel/s
Pixel Rate
52.56 GPixel/s
146.8 GTexel/s
Texture Rate
210.2 GTexel/s
-
-
-
3.524 TFLOPS
FP32 (float)
5.046 TFLOPS
1175 GFLOPS
FP64 (double)
1.682 TFLOPS
Board Design
225W
TDP
245W
550 W
Suggested PSU
550 W
No outputs
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
-
Graphics Processor
GK110
GPU Name
GK110B
-
-
-
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
7.08 billion
561 mm²
Die Size
561 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.5
5.1
Shader Model
5.1
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