Mobility Radeon HD 4870 and Radeon HD 4870 X2 - video card comparison
Mobility Radeon HD 4870
Radeon HD 4870 X2
Architecture
Terascale 1 (2008−2010)
TeraScale (2005−2013)
GPU code name
M98-XT
R700
Market segment
Laptop
Desktop
Release date
January 2009
August 2008
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
1x 6-pin + 1x 8-pin
Core clock speed
550 MHz
700 MHz
Floating-point performance
880.0 gflops
2x 1,120.0 gflops
Manufacturing process technology
55 nm
55 nm
Number of transistors
956 million
956 million
Pipelines / CUDA cores
800
800
Power consumption (TDP)
-
286 Watt
Texture fill rate
22.00
28.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
1 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
888 MHz
3600 MHz
Memory bandwidth
56.83 GB/s
115.2 GB/s
Shared memory
-
-
Display Connectors
No outputs
2x DVI, 1x S-Video
DirectX
10.1 (10_1)
10.1 (10_1)
OpenCL
1.1
1.1
OpenGL
3.3
3.3
Shader Model
4.1
4.1
Vulkan
N/A
N/A