NVIDIA Tesla K8 vs NVIDIA Tesla K40c
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
Oct 2013
Generation
Tesla
Tesla
Type
Professional
Professional
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
693 MHz
745 MHz
Boost Clock
811 MHz
876 MHz
Memory Clock
1250 MHz
1502 MHz
Memory
Memory Size
8GB
12GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
160.0GB/s
288.4GB/s
Render Config
Shading Units
1536
2880
TMUs
128
240
ROPs
32
48
L1 Cache
16 KB (per SMX)
16 KB (per SMX)
L2 Cache
512 KB
1536 KB
Theoretical Performance
Pixel Rate
25.95 GPixel/s
52.56 GPixel/s
Texture Rate
103.8 GTexel/s
210.2 GTexel/s
FP32 (float)
2.491 TFLOPS
5.046 TFLOPS
FP64 (double)
103.8 GFLOPS
1.682 TFLOPS
Graphics Processor
GPU Name
GK104
GK180
Architecture
Kepler
Kepler
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
3.54 billion
7.08 billion
Die Size
294 mm²
561 mm²
GPU Variant
-
GK180-890-A1
Board Design
TDP
100W
245W
Suggested PSU
300 W
550 W
Outputs
No outputs
No outputs
Power Connectors
1x 6-pin
1x 6-pin + 1x 8-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
3.0
3.5
Shader Model
5.1
5.1