NVIDIA GeForce GTX 660 vs AMD Radeon Instinct MI6
GPU · Specs Compare
Graphics Card
Release Date
Sep 2012
Dec 2016
Generation
GeForce 600
Radeon Instinct
Type
Desktop
Professional
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
980 MHz
1120 MHz
Boost Clock
1032 MHz
1233 MHz
Memory Clock
1502 MHz
1750 MHz
Memory
Memory Size
2GB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
144.2GB/s
224.0GB/s
Render Config
Shading Units
960
2304
TMUs
80
144
ROPs
24
32
L1 Cache
16 KB (per SMX)
16 KB (per CU)
L2 Cache
384 KB
2 MB
Compute Units
—
36
Theoretical Performance
Pixel Rate
20.64 GPixel/s
39.46 GPixel/s
Texture Rate
82.56 GTexel/s
177.6 GTexel/s
FP32 (float)
1.981 TFLOPS
5.682 TFLOPS
FP64 (double)
82.56 GFLOPS
355.1 GFLOPS
FP16 (half)
—
5.682 TFLOPS
Graphics Processor
GPU Name
GK106
Ellesmere
GPU Variant
GK106-400-A1
Ellesmere XT
Architecture
Kepler
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
2.54 billion
5.7 billion
Die Size
221 mm²
232 mm²
Board Design
TDP
140W
150W
Suggested PSU
300 W
450 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin
1x 6-pin
Graphics Features
DirectX
12 (11_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
3.0
2.1
Vulkan
1.1
1.2
CUDA
3.0
—
Shader Model
5.1
6.4
Benchmark
3DMark Time Spy
1,194
—
3DMark Time Spy Extreme
260
—
OctaneBench
27
—
Blender
111
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.