Radeon HD 4870 and GeForce 840M - video card comparison
Passmark - benchmark score Radeon HD 4870 vs GeForce 840M
Radeon HD 4870
1411
GeForce 840M
1121
Radeon HD 4870
GeForce 840M
Architecture
TeraScale (2005−2013)
Maxwell (2014−2018)
GPU code name
RV770
N15S-GT
Market segment
Desktop
Laptop
Release date
June 2008
March 2014
Bus support
-
PCI Express 2.0, PCI Express 3.0
Interface
PCIe 2.0 x16
PCIe 3.0 x8
Supplementary power connectors
2x 6-pin
-
Boost clock speed
-
1124 MHz
Core clock speed
750 MHz
1029 MHz
Floating-point performance
1,200.0 gflops
863.2 gflops
Manufacturing process technology
55 nm
28 nm
Number of transistors
956 million
-
Pipelines / CUDA cores
800
384
Power consumption (TDP)
150 Watt
33 Watt
Texture fill rate
30.00
17.98
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
3600 MHz
2000 MHz
Memory bandwidth
115.2 GB/s
16.02 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
1.2
OpenGL
3.3
4.5
Shader Model
4.1
5.1
Vulkan
N/A
1.1.126
GameWorks
-
+
GPU Boost
-
2.0
Optimus
-
+