AMD Radeon E8870 vs AMD Radeon R9 390
GPU Specs Compare
Graphics Card
Release Date
Sep 2015
Jun 2015
Generation
Embedded
Pirate Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Memory Clock
1500 MHz
1500 MHz
Memory
Memory Size
4GB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
128bit
512bit
Bandwidth
96.00GB/s
384.0GB/s
Render Config
Compute Units
12
40
Shading Units
768
2560
TMUs
48
160
ROPs
16
64
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
256 KB
1024 KB
Theoretical Performance
Pixel Rate
16.00 GPixel/s
64.00 GPixel/s
Texture Rate
48.00 GTexel/s
160.0 GTexel/s
FP32 (float)
1.536 TFLOPS
5.120 TFLOPS
FP64 (double)
96.00 GFLOPS
640.0 GFLOPS
Graphics Processor
GPU Name
Saturn
Grenada
GPU Variant
Saturn PRO
Grenada PRO(215-0880030)
Architecture
GCN 2.0
GCN 2.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
2.08 billion
6.2 billion
Die Size
160 mm²
438 mm²
Board Design
TDP
75W
275W
Outputs
No outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
None
1x 6-pin + 1x 8-pin
Suggested PSU
-
600 W
Graphics Features
DirectX
12 (12_0)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
2.0
2.0
Vulkan
1.2
1.2
Shader Model
6.3
6.3
📊 Benchmark
3DMark Time Spy
-
3,964
3DMark Time Spy Extreme
-
1,931