AMD Radeon R9 390 vs AMD Radeon R9 M290X Mac Edition
GPU · Specs Compare
Graphics Card
Release Date
Jun 2015
Nov 2014
Generation
Pirate Islands
Crystal System
Type
Desktop
Mobile
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1500 MHz
1365 MHz
Base Clock
—
850 MHz
Boost Clock
—
975 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
512bit
256bit
Bandwidth
384.0GB/s
174.7GB/s
Render Config
Compute Units
40
16
Shading Units
2560
1024
TMUs
160
64
ROPs
64
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
1024 KB
512 KB
Theoretical Performance
Pixel Rate
64.00 GPixel/s
31.20 GPixel/s
Texture Rate
160.0 GTexel/s
62.40 GTexel/s
FP32 (float)
5.120 TFLOPS
1.997 TFLOPS
FP64 (double)
640.0 GFLOPS
124.8 GFLOPS
Graphics Processor
GPU Name
Grenada
Pitcairn
GPU Variant
Grenada PRO(215-0880030)
Pitcairn PRO(215-0828062)
Architecture
GCN 2.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
6.2 billion
2.8 billion
Die Size
438 mm²
212 mm²
Board Design
TDP
275W
80W
Suggested PSU
600 W
—
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
No outputs
Power Connectors
1x 6-pin + 1x 8-pin
None
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
3,964
—
3DMark Time Spy Extreme
1,931
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.