NVIDIA Tesla K40s vs AMD Radeon HD 7870 XT
GPU · Specs Compare
Graphics Card
Release Date
Nov 2013
Nov 2012
Generation
Tesla Kepler
Southern Islands
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
706 MHz
925 MHz
Boost Clock
706 MHz
975 MHz
Memory Clock
1502 MHz
1500 MHz
Memory
Memory Size
12GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.4GB/s
192.0GB/s
Render Config
Shading Units
2880
1536
TMUs
240
96
ROPs
48
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
1536 KB
512 KB
Compute Units
—
24
Theoretical Performance
Pixel Rate
42.36 GPixel/s
31.20 GPixel/s
Texture Rate
169.4 GTexel/s
93.60 GTexel/s
FP32 (float)
4.067 TFLOPS
2.995 TFLOPS
FP64 (double)
1355.5 GFLOPS
748.8 GFLOPS
Graphics Processor
GPU Name
GK110B
Tahiti
Architecture
Kepler
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
7.08 billion
4.313 billion
Die Size
561 mm²
352 mm²
GPU Variant
—
Tahiti LE(215-0821122)
Board Design
TDP
245W
185W
Suggested PSU
550 W
450 W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
—
2x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
3.0
1.2
Vulkan
1.2.175
1.2
CUDA
3.5
—
Shader Model
6.5 (5.1)
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.