AMD Radeon HD 7970 vs AMD Radeon R9 M395X Mac Edition
GPU · Specs Compare
Graphics Card
Release Date
Jan 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
1375 MHz
1365 MHz
Memory
Memory Size
3GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
264.0GB/s
174.7GB/s
Render Config
Compute Units
32
32
Shading Units
2048
2048
TMUs
128
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
29.09 GPixel/s
Texture Rate
118.4 GTexel/s
116.4 GTexel/s
FP32 (float)
3.789 TFLOPS
3.723 TFLOPS
FP64 (double)
947.2 GFLOPS
232.7 GFLOPS
FP16 (half)
—
3.723 TFLOPS
Graphics Processor
GPU Name
Tahiti
Amethyst
GPU Variant
Tahiti XT(215-0821060)
Amethyst XT
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
5 billion
Die Size
352 mm²
366 mm²
Board Design
TDP
250W
250W
Suggested PSU
600 W
—
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin + 1x 8-pin
None
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.1 (1.2)
2.0
Vulkan
1.2.170
1.2
Shader Model
6.5 (5.1)
6.3
Benchmark
3DMark Time Spy
2,310
—
3DMark Time Spy Extreme
1,209
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.