AMD Radeon HD 8970M vs AMD Radeon R9 M290X Mac Edition
GPU Specs Compare
Graphics Card
Release Date
May 2013
Nov 2014
Generation
Solar System
Crystal System
Type
Mobile
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
850 MHz
850 MHz
Boost Clock
900 MHz
975 MHz
Memory Clock
1200 MHz
1365 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
153.6GB/s
174.7GB/s
Render Config
Compute Units
20
16
Shading Units
1280
1024
TMUs
80
64
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
28.80 GPixel/s
31.20 GPixel/s
Texture Rate
72.00 GTexel/s
62.40 GTexel/s
FP32 (float)
2.304 TFLOPS
1.997 TFLOPS
FP64 (double)
144.0 GFLOPS
124.8 GFLOPS
Graphics Processor
GPU Name
Neptune
Pitcairn
GPU Variant
Neptune XT(216-0847000)
Pitcairn PRO(215-0828062)
Architecture
GCN 1.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
2.8 billion
Die Size
212 mm²
212 mm²
Board Design
TDP
100W
80W
Outputs
No outputs
No outputs
Power Connectors
-
None
Graphics Features
DirectX
12 (11_1)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
1.2
1.2
Vulkan
1.2
1.2
Shader Model
5.1
5.1