AMD Radeon R9 390 X2 vs AMD Radeon HD 7970
GPU · Specs Compare
Graphics Card
Release Date
Sep 2015
Jan 2012
Generation
Pirate Islands
Southern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1350 MHz
1375 MHz
Memory
Memory Size
8GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
384bit
Bandwidth
345.6GB/s
264.0GB/s
Render Config
Compute Units
40
32
Shading Units
2560
2048
TMUs
160
128
ROPs
64
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
768 KB
Theoretical Performance
Pixel Rate
64.00 GPixel/s
29.60 GPixel/s
Texture Rate
160.0 GTexel/s
118.4 GTexel/s
FP32 (float)
5.120 TFLOPS
3.789 TFLOPS
FP64 (double)
640.0 GFLOPS
947.2 GFLOPS
Graphics Processor
GPU Name
Grenada
Tahiti
GPU Variant
Grenada PRO(215-0880030)
Tahiti XT(215-0821060)
Architecture
GCN 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
6.2 billion
4.313 billion
Die Size
438 mm²
352 mm²
Board Design
TDP
580W
250W
Suggested PSU
950 W
600 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
4x 8-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.0
2.1 (1.2)
Vulkan
1.2
1.2.170
Shader Model
6.3
6.5 (5.1)
Benchmark
3DMark Time Spy
—
2,310
3DMark Time Spy Extreme
—
1,209
▲ Specs Compare
Data sourced from official specifications and benchmark tests.