Mobility Radeon HD 4870 X2 and GeForce GT 650M SLI - video card comparison
Mobility Radeon HD 4870 X2
GeForce GT 650M SLI
Architecture
Terascale 1 (2008−2010)
Kepler (2012−2018)
GPU code name
M98-XT
N13E-GE
Market segment
Laptop
Laptop
Release date
January 2009
March 2012
Interface
PCIe 2.0 x16
-
Boost clock speed
-
835 MHz
Core clock speed
550 MHz
790 MHz
Floating-point performance
2x 880.0 gflops
-
Manufacturing process technology
55 nm
28 nm
Number of transistors
956 million
-
Pipelines / CUDA cores
1600
768
Texture fill rate
22.00
-
Memory type
GDDR3, GDDR5
GDDR5
Maximum RAM amount
2 GB
2x2 GB
Memory bus width
256 Bit
2x 128 Bit
Memory clock speed
888 MHz
4000 MHz
Memory bandwidth
89.6 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
-
DirectX
10.1 (10_1)
11
CUDA
-
+
OpenCL
1.1
-
OpenGL
3.3
-
Shader Model
4.1
-
Vulkan
N/A
-
Optimus
-
+