Mobility Radeon HD 3870 X2 and GeForce GT 420M - video card comparison
Mobility Radeon HD 3870 X2
GeForce GT 420M
Architecture
RV6xx (2007−2010)
Fermi (2010−2014)
GPU code name
M88-XT CF
N11P-GE
Market segment
Laptop
Laptop
Release date
September 2008
September 2010
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
660 MHz
500 MHz
CUDA cores
-
96
Floating-point performance
2x 422.4 gflops
192 gflops
Manufacturing process technology
55 nm
40 nm
Number of transistors
666 million
585 million
Pipelines / CUDA cores
640
96
Power consumption (TDP)
110 Watt
23 Watt
Texture fill rate
10.56
6.0 billion/sec
Memory type
GDDR3
(G)DDR3
Maximum RAM amount
512 MB
1 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
850 MHz
800 MHz
Memory bandwidth
54.4 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
10.1 (10_1)
12 API
CUDA
-
+
OpenCL
N/A
1.1
OpenGL
3.3
4.5
Shader Model
4.1
5.1
Vulkan
N/A
N/A