AMD Radeon R9 390X vs AMD Radeon HD 7950
GPU · Specs Compare
Graphics Card
Release Date
Jun 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
1500 MHz
1250 MHz
Memory
Memory Size
8GB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
384bit
Bandwidth
384.0GB/s
240.0GB/s
Render Config
Compute Units
44
28
Shading Units
2816
1792
TMUs
176
112
ROPs
64
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
768 KB
Theoretical Performance
Pixel Rate
67.20 GPixel/s
25.60 GPixel/s
Texture Rate
184.8 GTexel/s
89.60 GTexel/s
FP32 (float)
5.914 TFLOPS
2.867 TFLOPS
FP64 (double)
739.2 GFLOPS
716.8 GFLOPS
Graphics Processor
GPU Name
Grenada
Tahiti
GPU Variant
Grenada XT(215-0880004)
Tahiti PRO(215-0821056)
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
275W
200W
Suggested PSU
600 W
550 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
1x 6-pin + 1x 8-pin
2x 6-pin
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
Benchmark
3DMark Time Spy
—
1,969
3DMark Time Spy Extreme
—
1,019
▲ Specs Compare
Data sourced from official specifications and benchmark tests.