Radeon HD 4870 and GeForce 820M - video card comparison
Passmark - benchmark score Radeon HD 4870 vs GeForce 820M
Radeon HD 4870
1411
GeForce 820M
511
Radeon HD 4870
GeForce 820M
Architecture
TeraScale (2005−2013)
Fermi (2010−2014)
GPU code name
RV770
N15V-GM
Market segment
Desktop
Laptop
Release date
June 2008
January 2014
Bus support
-
PCI Express 2.0
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
2x 6-pin
-
Core clock speed
750 MHz
775 MHz
Floating-point performance
1,200.0 gflops
240.0 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
956 million
585 million
Pipelines / CUDA cores
800
96
Power consumption (TDP)
150 Watt
15 Watt
Texture fill rate
30.00
10.00
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
3600 MHz
1800 MHz
Memory bandwidth
115.2 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x S-Video
No outputs
DirectX
10.1 (10_1)
12 (11_0)
CUDA
-
+
OpenCL
1.1
1.1
OpenGL
3.3
4.5
Shader Model
4.1
5.1
Vulkan
N/A
N/A
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+