NVIDIA Tesla K20c vs NVIDIA Tesla K8
We compared two Professional market GPUs: 5GB VRAM Tesla K20c and 8GB VRAM Tesla K8 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA Tesla K20c 's Advantages
Larger VRAM bandwidth (208.0GB/s vs 160.0GB/s)
960 additional rendering cores
NVIDIA Tesla K8 's Advantages
Released 1 years and 10 months late
Boost Clock811MHz
More VRAM (8GB vs 5GB)
Lower TDP (100W vs 225W)
Score
Benchmark
FP32 (float)
Tesla K20c
+41%
3.524 TFLOPS
Tesla K8
2.491 TFLOPS
Graphics Card
Nov 2012
Release Date
Sep 2014
Tesla
Generation
Tesla
Professional
Type
Professional
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
693 MHz
-
Boost Clock
811 MHz
1300 MHz
Memory Clock
1250 MHz
Memory
5GB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
320bit
Memory Bus
256bit
208.0GB/s
Bandwidth
160.0GB/s
Render Config
-
-
-
-
-
-
2496
Shading Units
1536
208
TMUs
128
40
ROPs
32
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
1280 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
36.71 GPixel/s
Pixel Rate
25.95 GPixel/s
146.8 GTexel/s
Texture Rate
103.8 GTexel/s
-
-
-
3.524 TFLOPS
FP32 (float)
2.491 TFLOPS
1175 GFLOPS
FP64 (double)
103.8 GFLOPS
Board Design
225W
TDP
100W
550 W
Suggested PSU
300 W
No outputs
Outputs
No outputs
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin
Graphics Processor
GK110
GPU Name
GK104
GK110-885-KA-A1
GPU Variant
-
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
7.08 billion
Transistors
3.54 billion
561 mm²
Die Size
294 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.5
CUDA
3.0
5.1
Shader Model
5.1
