NVIDIA Tesla K40c vs AMD Radeon HD 6870 X2
GPU Specs Compare
Graphics Card
Release Date
Oct 2013
Jul 2011
Generation
Tesla
Northern Islands
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
745 MHz
-
Boost Clock
876 MHz
-
Memory Clock
1502 MHz
1050 MHz
Memory
Memory Size
12GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.4GB/s
134.4GB/s
Render Config
Shading Units
2880
1120
TMUs
240
56
ROPs
48
32
L1 Cache
16 KB (per SMX)
8 KB (per CU)
L2 Cache
1536 KB
512 KB
Compute Units
-
14
Theoretical Performance
Pixel Rate
52.56 GPixel/s
28.80 GPixel/s
Texture Rate
210.2 GTexel/s
50.40 GTexel/s
FP32 (float)
5.046 TFLOPS
2.016 TFLOPS
FP64 (double)
1.682 TFLOPS
-
Graphics Processor
GPU Name
GK180
Barts
GPU Variant
GK180-890-A1
Barts XT(215-0798000)
Architecture
Kepler
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
7.08 billion
1.7 billion
Die Size
561 mm²
255 mm²
Board Design
TDP
245W
300W
Suggested PSU
550 W
700 W
Outputs
No outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Power Connectors
1x 6-pin + 1x 8-pin
-
Graphics Features
DirectX
12 (11_0)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
3.0
1.2
Vulkan
1.1
N/A
CUDA
3.5
-
Shader Model
5.1
5.0