AMD Radeon HD 6850 vs NVIDIA Tesla K20X
GPU Specs Compare
Graphics Card
Release Date
Oct 2010
Nov 2012
Generation
Northern Islands
Tesla
Type
Desktop
Professional
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1000 MHz
1300 MHz
Memory
Memory Size
1024MB
6GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
128.0GB/s
249.6GB/s
Render Config
Compute Units
12
-
Shading Units
960
2688
TMUs
48
224
ROPs
32
48
L1 Cache
8 KB (per CU)
16 KB (per SMX)
L2 Cache
512 KB
1536 KB
Theoretical Performance
Pixel Rate
24.80 GPixel/s
40.99 GPixel/s
Texture Rate
37.20 GTexel/s
164.0 GTexel/s
FP32 (float)
1488 GFLOPS
3.935 TFLOPS
FP64 (double)
-
1312 GFLOPS
Graphics Processor
GPU Name
Barts
GK110
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
127W
235W
Suggested PSU
300 W
550 W
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
No outputs
Power Connectors
1x 6-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
11.2 (11_0)
12 (11_0)
OpenGL
4.4
4.6
OpenCL
1.2
3.0
Vulkan
N/A
1.1
Shader Model
5.0
5.1
CUDA
-
3.5