AMD Radeon RX 580 Mobile vs AMD Radeon HD 7870 XT
GPU · Specs Compare
Graphics Card
Release Date
Apr 2017
Nov 2012
Generation
Mobility Radeon
Southern Islands
Type
Mobile
Desktop
Bus Interface
MXM-B (3.0)
PCIe 3.0 x16
Clock Speeds
Base Clock
1000 MHz
925 MHz
Boost Clock
1077 MHz
975 MHz
Memory Clock
2000 MHz
1500 MHz
Memory
Memory Size
8GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
256.0GB/s
192.0GB/s
Render Config
Compute Units
36
24
Shading Units
2304
1536
TMUs
144
96
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
2 MB
512 KB
Theoretical Performance
Pixel Rate
34.46 GPixel/s
31.20 GPixel/s
Texture Rate
155.1 GTexel/s
93.60 GTexel/s
FP16 (half)
4.963 TFLOPS
—
FP32 (float)
4.963 TFLOPS
2.995 TFLOPS
FP64 (double)
310.2 GFLOPS
748.8 GFLOPS
Graphics Processor
GPU Name
Polaris 20
Tahiti
GPU Variant
Polaris 20M XT
Tahiti LE(215-0821122)
Architecture
GCN 4.0
GCN 1.0
Foundry
GlobalFoundries
TSMC
Process Size
14 nm
28 nm
Transistors
5.7 billion
4.313 billion
Die Size
232 mm²
352 mm²
Board Design
TDP
100W
185W
Outputs
No outputs
1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2
Power Connectors
None
2x 6-pin
Suggested PSU
—
450 W
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.2
1.2
Shader Model
6.4
5.1
Benchmark
3DMark Time Spy
3,553
—
3DMark Time Spy Extreme
1,626
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.