AMD Radeon HD 7970 GHz Edition vs AMD Radeon R9 390
GPU Specs Compare
Graphics Card
Release Date
Jun 2012
Jun 2015
Generation
Southern Islands
Pirate Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
-
Boost Clock
1050 MHz
-
Memory Clock
1500 MHz
1500 MHz
Memory
Memory Size
3GB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
512bit
Bandwidth
288.0GB/s
384.0GB/s
Render Config
Compute Units
32
40
Shading Units
2048
2560
TMUs
128
160
ROPs
32
64
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
1024 KB
Theoretical Performance
Pixel Rate
33.60 GPixel/s
64.00 GPixel/s
Texture Rate
134.4 GTexel/s
160.0 GTexel/s
FP32 (float)
4.301 TFLOPS
5.120 TFLOPS
FP64 (double)
1075 GFLOPS
640.0 GFLOPS
Graphics Processor
GPU Name
Tahiti
Grenada
GPU Variant
Tahiti XT2(215-0821065)
Grenada PRO(215-0880030)
Architecture
GCN 1.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
6.2 billion
Die Size
352 mm²
438 mm²
Board Design
TDP
300W
275W
Suggested PSU
700 W
600 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 6-pin + 1x 8-pin
1x 6-pin + 1x 8-pin
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
📊 Benchmark
3DMark Time Spy
-
3,964
3DMark Time Spy Extreme
-
1,931