AMD Radeon R9 M390X vs AMD Radeon HD 8860 OEM
GPU · Specs Compare
Graphics Card
Release Date
May 2015
Jan 2013
Generation
Crystal System
Sea Islands
Type
Mobile
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1250 MHz
1400 MHz
Memory
Memory Size
4GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
160.0GB/s
179.2GB/s
Render Config
Compute Units
32
20
Shading Units
2048
1280
TMUs
128
80
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
23.14 GPixel/s
29.60 GPixel/s
Texture Rate
92.54 GTexel/s
74.00 GTexel/s
FP16 (half)
2.961 TFLOPS
—
FP32 (float)
2.961 TFLOPS
2.368 TFLOPS
FP64 (double)
185.1 GFLOPS
148.0 GFLOPS
Graphics Processor
GPU Name
Amethyst
Curacao
GPU Variant
Amethyst XT
Curacao PRO(215-0848000)
Architecture
GCN 3.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
5 billion
2.8 billion
Die Size
366 mm²
212 mm²
Board Design
TDP
75W
175W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
1x 6-pin
Suggested PSU
—
450 W
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
▲ Specs Compare
Data sourced from official specifications and benchmark tests.