Radeon R9 255 OEM and Radeon E8870 MXM - video card comparison
Radeon R9 255 OEM
Radeon E8870 MXM
Architecture
GCN 1.0 (2012−2020)
GCN 2.0 (2013−2017)
GPU code name
Cape Verde
Saturn
Market segment
Desktop
Desktop
Release date
December 2013
September 2015
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
1x 6-pin
None
Boost clock speed
930 MHz
-
Core clock speed
900 MHz
1000 MHz
Floating-point performance
952.3 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,500 million
2,080 million
Pipelines / CUDA cores
512
768
Power consumption (TDP)
65 Watt
75 Watt
Texture fill rate
29.76
48.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
4600 MHz
6 GB/s
Memory bandwidth
73.6 GB/s
96 GB/s
Display Connectors
No outputs
Portable Device Dependent
DirectX
12 (11_1)
12 (12_0)
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5 (6.0)
Vulkan
1.2.131
1.2.170