Radeon HD 8790M and Radeon HD 7770M - video card comparison
Radeon HD 8790M
Radeon HD 7770M
Architecture
GCN (2011−2017)
GCN (2011−2017)
GPU code name
Mars XTX
Chelsea XT
Market segment
Laptop
Laptop
Release date
November 2012
April 2012
Interface
MXM-A (3.0)
PCIe 2.0 x16
Supplementary power connectors
None
-
Boost clock speed
900 MHz
-
Core clock speed
850 MHz
675 MHz
Floating-point performance
691.2 gflops
691.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
950 million
1,500 million
Pipelines / CUDA cores
384
512
Power consumption (TDP)
unknown
32 Watt
Texture fill rate
21.60
21.60
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
4500 MHz
4000 MHz
Memory bandwidth
64 GB/s
64 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_1)
12 (11_1)
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.2.131
1.2.131