GeForce GT 620M and Mobility Radeon HD 3870 - video card comparison
GeForce GT 620M
Mobility Radeon HD 3870
Architecture
Fermi (2010−2014)
RV6xx (2007−2010)
GPU code name
N13P-GLP / N13M-GS
M88-XT
Market segment
Laptop
Laptop
Release date
March 2012
March 2008
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Boost clock speed
715 MHz
-
Core clock speed
Up to 625 MHz
660 MHz
CUDA cores
96
-
Floating-point performance
253.4 gflops
422.4 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
585 million
666 million
Pipelines / CUDA cores
96
320
Power consumption (TDP)
15 Watt
55 Watt
Texture fill rate
Up to 10.0 billion/sec
10.56
Memory type
DDR3
GDDR3
Maximum RAM amount
1 GB
512 MB
Memory bus width
Up to 128bit
256 Bit
Memory clock speed
1800 MHz
850 MHz
Memory bandwidth
Up to 28.8 GB/s
54.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
HDMI
+
-
HDCP
+
-
Maximum VGA resolution
Up to 2048x1536
-
DirectX
12 API
10.1 (10_1)
CUDA
+
-
OpenCL
1.1
N/A
OpenGL
4.5
3.3
Shader Model
5.1
4.1
Vulkan
N/A
N/A
3D Blu-Ray
+
-
Optimus
+
-