AMD Radeon R9 M395 Mac Edition vs AMD Radeon HD 7990
GPU Specs Compare
Graphics Card
Release Date
May 2015
Apr 2013
Generation
Crystal System
Southern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
1365 MHz
1500 MHz
Base Clock
-
950 MHz
Boost Clock
-
1000 MHz
Memory
Memory Size
2GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
174.7GB/s
288.0GB/s
Render Config
Compute Units
28
32
Shading Units
1792
2048
TMUs
112
128
ROPs
32
32
L1 Cache
-
16 KB (per CU)
L2 Cache
-
768 KB
Theoretical Performance
Pixel Rate
26.69 GPixel/s
32.00 GPixel/s
Texture Rate
93.41 GTexel/s
128.0 GTexel/s
FP32 (float)
2.989 TFLOPS
4.096 TFLOPS
FP64 (double)
373.6 GFLOPS
1024 GFLOPS
Graphics Processor
GPU Name
Amethyst
Malta
GPU Variant
Amethyst PRO(216-0872004)
Malta XT(215-0849026)
Architecture
GCN 3.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
5 billion
4.313 billion
Die Size
366 mm²
365 mm²
Board Design
TDP
250W
375W
Outputs
No outputs
1x DVI4x mini-DisplayPort 1.2
Power Connectors
None
2x 8-pin
Suggested PSU
-
750 W
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
1.2
Vulkan
1.2
1.2
Shader Model
6.3
5.1