Radeon R9 285 and Radeon E8870 MXM - video card comparison
Radeon R9 285
Radeon E8870 MXM
Architecture
GCN 3.0 (2014−2017)
GCN 2.0 (2013−2017)
GPU code name
Tonga
Saturn
Market segment
Desktop
Desktop
Release date
September 2014
September 2015
Interface
PCIe 3.0 x16
MXM-B (3.0)
Supplementary power connectors
2x 6-pin
None
Core clock speed
918 MHz
1000 MHz
Floating-point performance
3,290 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
5,000 million
2,080 million
Pipelines / CUDA cores
1792
768
Power consumption (TDP)
190 Watt
75 Watt
Texture fill rate
102.8
48.00
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5.5 GB/s
6 GB/s
Memory bandwidth
176.0 GB/s
96 GB/s
Display Connectors
2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2
Portable Device Dependent
HDMI
+
-
DirectX
12 (12_0)
12 (12_0)
OpenCL
2.1
2.1
OpenGL
4.6
4.6
Shader Model
6.5
6.5 (6.0)
Vulkan
1.2.170
1.2.170