NVIDIA GeForce GTX 660 Rev. 2 vs AMD Radeon RX 580
GPU Specs Compare
Graphics Card
Release Date
Sep 2014
Apr 2017
Generation
GeForce 600
Polaris
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
980 MHz
1257 MHz
Boost Clock
1032 MHz
1340 MHz
Memory Clock
1502 MHz
2000 MHz
Memory
Memory Size
2GB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
192bit
256bit
Bandwidth
144.2GB/s
256.0GB/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
42.88 GPixel/s
Texture Rate
82.56 GTexel/s
193.0 GTexel/s
FP32 (float)
1.981 TFLOPS
6.175 TFLOPS
FP64 (double)
82.56 GFLOPS
385.9 GFLOPS
FP16 (half)
-
6.175 TFLOPS
Graphics Processor
GPU Name
GK104
Polaris 20
Architecture
Kepler
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
3.54 billion
5.7 billion
Die Size
294 mm²
232 mm²
GPU Variant
-
Polaris 20 XTX(215-0910038)
Board Design
TDP
140W
185W
Suggested PSU
300 W
450 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x HDMI 2.0b3x DisplayPort 1.4a
Power Connectors
1x 6-pin
1x 8-pin
Graphics Features
DirectX
12 (11_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
3.0
2.1
Vulkan
1.1
1.3
CUDA
3.0
-
Shader Model
5.1
6.7