NVIDIA Tesla K40d vs AMD Radeon R9 285
GPU Specs Compare
Graphics Card
Release Date
Nov 2013
Sep 2014
Generation
Tesla Kepler
Volcanic Islands
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
745 MHz
-
Boost Clock
876 MHz
-
Memory Clock
1502 MHz
1375 MHz
Memory
Memory Size
12GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.4GB/s
176.0GB/s
Render Config
Shading Units
2880
1792
TMUs
240
112
ROPs
48
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
1536 KB
512 KB
Compute Units
-
28
Theoretical Performance
Pixel Rate
52.56 GPixel/s
29.38 GPixel/s
Texture Rate
210.2 GTexel/s
102.8 GTexel/s
FP32 (float)
5.046 TFLOPS
3.290 TFLOPS
FP64 (double)
1.682 TFLOPS
205.6 GFLOPS
FP16 (half)
-
3.290 TFLOPS
Graphics Processor
GPU Name
GK110B
Tonga
Architecture
Kepler
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
7.08 billion
5 billion
Die Size
561 mm²
366 mm²
GPU Variant
-
Tonga PRO(215-0851128)
Board Design
TDP
245W
190W
Suggested PSU
550 W
450 W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
-
2x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
3.0
2.1
Vulkan
1.2.175
1.2.170
CUDA
3.5
-
Shader Model
6.5 (5.1)
6.5