Radeon HD 6990M and Mobility Radeon HD 4870 - video card comparison
Radeon HD 6990M
Mobility Radeon HD 4870
Architecture
Terascale 2 (2009−2015)
Terascale 1 (2008−2010)
GPU code name
Blackcomb XTX
M98-XT
Market segment
Laptop
Laptop
Release date
July 2011
January 2009
Interface
MXM-B (3.0)
PCIe 2.0 x16
Supplementary power connectors
None
-
Core clock speed
715 MHz
550 MHz
Floating-point performance
1,601.6 gflops
880.0 gflops
Manufacturing process technology
40 nm
55 nm
Number of transistors
1,700 million
956 million
Pipelines / CUDA cores
1120
800
Power consumption (TDP)
100 Watt
-
Texture fill rate
40.04
22.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
900 MHz
888 MHz
Memory bandwidth
115.2 GB/s
56.83 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
11.2 (11_0)
10.1 (10_1)
OpenCL
1.2
1.1
OpenGL
4.4
3.3
Shader Model
5.0
4.1
Vulkan
N/A
N/A