Radeon HD 7970 and GeForce 820M - video card comparison
Passmark - benchmark score Radeon HD 7970 vs GeForce 820M
Radeon HD 7970
5405
GeForce 820M
511
Radeon HD 7970
GeForce 820M
Architecture
GCN (2011−2017)
Fermi (2010−2014)
GPU code name
Tahiti XT
N15V-GM
Market segment
Desktop
Laptop
Release date
December 2011
January 2014
Bus support
PCIe 2.1 x16
PCI Express 2.0
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
1x 6-pin + 1x 8-pin
-
Boost clock speed
925 MHz
-
Core clock speed
-
775 MHz
Floating-point performance
3,789 gflops
240.0 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
4,313 million
585 million
Pipelines / CUDA cores
2048
96
Power consumption (TDP)
300 Watt
15 Watt
Texture fill rate
118.4
10.00
Memory type
GDDR5
DDR3
Maximum RAM amount
6 GB
2 GB
Memory bus width
384 Bit
64 Bit
Memory clock speed
1375 MHz
1800 MHz
Memory bandwidth
264 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 2x mini-DisplayPort
No outputs
Eyefinity
+
-
HDMI
+
-
DisplayPort support
-
-
DirectX
DirectX® 11
12 (11_0)
CUDA
-
+
Mantle
-
-
OpenCL
1.2
1.1
OpenGL
4.6
4.5
Shader Model
5.1
5.1
Vulkan
-
N/A
AppAcceleration
-
-
CrossFire
1
-
Enduro
-
-
FreeSync
1
-
GameWorks
-
+
GPU Boost
-
2.0
HD3D
-
-
Optimus
-
+
PowerTune
-
-
TrueAudio
-
-
ZeroCore
-
-