AMD Radeon HD 8970M vs AMD Radeon RX 455 OEM
GPU Specs Compare
Graphics Card
Release Date
May 2013
Jun 2016
Generation
Solar System
Arctic Islands
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
850 MHz
-
Boost Clock
900 MHz
-
Memory Clock
1200 MHz
1625 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
128bit
Bandwidth
153.6GB/s
104.0GB/s
Render Config
Compute Units
20
12
Shading Units
1280
768
TMUs
80
48
ROPs
32
16
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
256 KB
Theoretical Performance
Pixel Rate
28.80 GPixel/s
16.80 GPixel/s
Texture Rate
72.00 GTexel/s
50.40 GTexel/s
FP32 (float)
2.304 TFLOPS
1.613 TFLOPS
FP64 (double)
144.0 GFLOPS
100.8 GFLOPS
Graphics Processor
GPU Name
Neptune
Tobago
GPU Variant
Neptune XT(216-0847000)
Tobago PRO(215-0875010)
Architecture
GCN 1.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
2.08 billion
Die Size
212 mm²
160 mm²
Board Design
TDP
100W
100W
Outputs
No outputs
1x DVI1x HDMI 1.4a1x DisplayPort 1.2
Suggested PSU
-
300 W
Power Connectors
-
1x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.0
Vulkan
1.2
1.2
Shader Model
5.1
6.3