AMD Radeon HD 7870 GHz Edition vs AMD Radeon R9 M395 Mac Edition
GPU Specs Compare
Graphics Card
Release Date
Mar 2012
May 2015
Generation
Southern Islands
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
MXM-B (3.0)
Clock Speeds
Memory Clock
1200 MHz
1365 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
153.6GB/s
174.7GB/s
Render Config
Compute Units
20
28
Shading Units
1280
1792
TMUs
80
112
ROPs
32
32
L1 Cache
16 KB (per CU)
-
L2 Cache
512 KB
-
Theoretical Performance
Pixel Rate
32.00 GPixel/s
26.69 GPixel/s
Texture Rate
80.00 GTexel/s
93.41 GTexel/s
FP32 (float)
2.560 TFLOPS
2.989 TFLOPS
FP64 (double)
160.0 GFLOPS
373.6 GFLOPS
Graphics Processor
GPU Name
Pitcairn
Amethyst
GPU Variant
Pitcairn XT(215-0828047)
Amethyst PRO(216-0872004)
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.8 billion
5 billion
Die Size
212 mm²
366 mm²
Board Design
TDP
175W
250W
Suggested PSU
450 W
-
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
2x 6-pin
None
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