Radeon R9 Nano and Radeon HD 7970 - video card comparison
Passmark - benchmark score Radeon R9 Nano vs Radeon HD 7970
Radeon R9 Nano
8741
Radeon HD 7970
5405
Radeon R9 Nano
Radeon HD 7970
Architecture
GCN 1.2 (2015−2016)
GCN (2011−2017)
GPU code name
Fiji
Tahiti XT
Market segment
Desktop
Desktop
Release date
September 2015
December 2011
Bus support
PCIe 3.0
PCIe 2.1 x16
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 8-pin
1x 6-pin + 1x 8-pin
Bridgeless CrossFire
1
-
Boost clock speed
1000 MHz
925 MHz
Compute units
64
-
Floating-point performance
8,192 gflops
3,789 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
8,900 million
4,313 million
Pipelines / CUDA cores
4096
2048
Power consumption (TDP)
175 Watt
300 Watt
Texture fill rate
256.0
118.4
Memory type
High Bandwidth Memory (HBM)
GDDR5
Maximum RAM amount
4 GB
6 GB
Memory bus width
4096 Bit
384 Bit
Memory clock speed
500 MHz
1375 MHz
Memory bandwidth
512 GB/s
264 GB/s
High bandwidth memory (HBM)
+
-
Shared memory
-
-
Display Connectors
1x HDMI, 3x DisplayPort
1x DVI, 1x HDMI, 2x mini-DisplayPort
Eyefinity
+
+
Number of Eyefinity displays
6
-
HDMI
+
+
DisplayPort support
+
-
DirectX
DirectX® 12
DirectX® 11
Mantle
+
-
OpenCL
2.0
1.2
OpenGL
4.5
4.6
Shader Model
6.3
5.1
Vulkan
+
-
AppAcceleration
+
-
CrossFire
1
1
DDMA audio
+
-
Enduro
-
-
FreeSync
1
1
FRTC
1
-
HD3D
+
-
LiquidVR
1
-
PowerTune
+
-
TressFX
1
-
TrueAudio
+
-
VCE
+
-
ZeroCore
+
-