AMD Radeon HD 8870 OEM vs AMD Radeon RX 580 2048SP
GPU · Specs Compare
Graphics Card
Release Date
Jan 2013
Oct 2018
Generation
Sea Islands
Polaris
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1200 MHz
1750 MHz
Base Clock
—
1168 MHz
Boost Clock
—
1284 MHz
Memory
Memory Size
2GB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
153.6GB/s
224.0GB/s
Render Config
Compute Units
20
32
Shading Units
1280
2048
TMUs
80
128
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
2 MB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
41.09 GPixel/s
Texture Rate
80.00 GTexel/s
164.4 GTexel/s
FP32 (float)
2.560 TFLOPS
5.259 TFLOPS
FP64 (double)
160.0 GFLOPS
328.7 GFLOPS
FP16 (half)
—
5.259 TFLOPS
Graphics Processor
GPU Name
Pitcairn
Polaris 20
GPU Variant
Pitcairn XT(215-0828047)
Polaris 20 XL(215-0910052)
Architecture
GCN 1.0
GCN 4.0
Foundry
TSMC
GlobalFoundries
Process Size
28 nm
14 nm
Transistors
2.8 billion
5.7 billion
Die Size
212 mm²
232 mm²
Board Design
TDP
175W
150W
Suggested PSU
450 W
450 W
Outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
1x DVI1x HDMI 2.0b3x DisplayPort 1.4a
Power Connectors
2x 6-pin
1x 8-pin
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.2
1.2
Shader Model
5.1
6.4
Benchmark
3DMark Time Spy
—
3,826
▲ Specs Compare
Data sourced from official specifications and benchmark tests.