Radeon R9 Nano and GeForce GTX 660 Rev. 2 - video card comparison
Radeon R9 Nano
GeForce GTX 660 Rev. 2
Architecture
GCN 1.2 (2015−2016)
Kepler (2012−2018)
GPU code name
Fiji
GK104
Market segment
Desktop
Desktop
Release date
September 2015
September 2014
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 8-pin
1x 6-pin
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
1032 MHz
Compute units
64
-
Core clock speed
-
980 MHz
Floating-point performance
8,192 gflops
1,981 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
8,900 million
3,540 million
Pipelines / CUDA cores
4096
960
Power consumption (TDP)
175 Watt
140 Watt
Texture fill rate
256.0
82.56
Memory type
High Bandwidth Memory (HBM)
GDDR5
Maximum RAM amount
4 GB
2 GB
Memory bus width
4096 Bit
192 Bit
Memory clock speed
500 MHz
6008 MHz
Memory bandwidth
512 GB/s
144.2 GB/s
High bandwidth memory (HBM)
+
-
Shared memory
-
-
Display Connectors
1x HDMI, 3x DisplayPort
2x DVI, 1x HDMI, 1x DisplayPort
Eyefinity
+
-
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
12 (11_0)
CUDA
-
3.0
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.5
4.6
Shader Model
6.3
5.1
Vulkan
+
1.1.126
AppAcceleration
+
-
CrossFire
1
-
DDMA audio
+
-
Enduro
-
-
FreeSync
1
-
FRTC
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
+
-
TressFX
1
-
TrueAudio
+
-
VCE
+
-
ZeroCore
+
-