AMD Radeon HD 7970 X2 vs AMD Radeon R9 M390X
GPU Specs Compare
Graphics Card
Release Date
Aug 2012
May 2015
Generation
Southern Islands
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1375 MHz
1250 MHz
Memory
Memory Size
3GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
264.0GB/s
160.0GB/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
23.14 GPixel/s
Texture Rate
118.4 GTexel/s
92.54 GTexel/s
FP32 (float)
3.789 TFLOPS
2.961 TFLOPS
FP64 (double)
947.2 GFLOPS
185.1 GFLOPS
FP16 (half)
-
2.961 TFLOPS
Graphics Processor
GPU Name
New Zealand
Amethyst
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
GPU Variant
-
Amethyst XT
Board Design
TDP
500W
75W
Suggested PSU
900 W
-
Outputs
2x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
No outputs
Power Connectors
3x 8-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