AMD Radeon HD 6850 X2 vs NVIDIA Tesla K40d
GPU Specs Compare
Graphics Card
Release Date
Sep 2011
Nov 2013
Generation
Northern Islands
Tesla Kepler
Type
Desktop
Professional
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1050 MHz
1502 MHz
Base Clock
-
745 MHz
Boost Clock
-
876 MHz
Memory
Memory Size
2GB
12GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
134.4GB/s
288.4GB/s
Render Config
Compute Units
12
-
Shading Units
960
2880
TMUs
48
240
ROPs
32
48
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
1536 KB
Theoretical Performance
Pixel Rate
25.60 GPixel/s
52.56 GPixel/s
Texture Rate
38.40 GTexel/s
210.2 GTexel/s
FP32 (float)
1.536 TFLOPS
5.046 TFLOPS
FP64 (double)
-
1.682 TFLOPS
Graphics Processor
GPU Name
Barts
GK110B
GPU Variant
Barts PRO(215-0798006)
-
Architecture
TeraScale 2
Kepler
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
7.08 billion
Die Size
255 mm²
561 mm²
Board Design
TDP
254W
245W
Suggested PSU
600 W
550 W
Outputs
2x DVI1x HDMI 1.3a1x DisplayPort 1.1
No outputs
Power Connectors
2x 8-pin
-
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
3.0
Vulkan
N/A
1.2.175
Shader Model
5.0
6.5 (5.1)
CUDA
-
3.5