Home GPU Comparison AMD Radeon RX 580X Mobile vs AMD Radeon HD 6870M

AMD Radeon RX 580X Mobile vs AMD Radeon HD 6870M

We compared two Mobile platform GPUs: 8GB VRAM Radeon RX 580X Mobile and 1024MB VRAM Radeon HD 6870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 580X Mobile 's Advantages
Released 7 years and 3 months late
Boost Clock1077MHz
More VRAM (8GB vs 1024GB)
Larger VRAM bandwidth (256.0GB/s vs 64.00GB/s)
1504 additional rendering cores
AMD Radeon HD 6870M 's Advantages
Lower TDP (50W vs 100W)

Score

Benchmark

FP32 (float)
Radeon RX 580X Mobile +359%
4.963 TFLOPS
Radeon HD 6870M
1.08 TFLOPS
VS

Graphics Card

Apr 2018
Release Date
Jan 2011
Mobility Radeon
Generation
Vancouver
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
MXM-B (3.0)

Clock Speeds

1000 MHz
Base Clock
-
1077 MHz
Boost Clock
-
2000 MHz
Memory Clock
1000 MHz

Memory

8GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
128bit
256.0GB/s
Bandwidth
64.00GB/s

Render Config

36
Compute Units
10
-
-
-
2304
Shading Units
800
144
TMUs
40
32
ROPs
16
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
2 MB
L2 Cache
256 KB
-
-
-

Theoretical Performance

34.46 GPixel/s
Pixel Rate
10.80 GPixel/s
155.1 GTexel/s
Texture Rate
27.00 GTexel/s
4.963 TFLOPS
FP16 (half)
-
4.963 TFLOPS
FP32 (float)
1080 GFLOPS
310.2 GFLOPS
FP64 (double)
-

Board Design

100W
TDP
50W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-

Graphics Processor

Polaris 20
GPU Name
Granville
Polaris 20M XT
GPU Variant
Granville XT (216-0769024)
GCN 4.0
Architecture
TeraScale 2
GlobalFoundries
Foundry
TSMC
14 nm
Process Size
40 nm
5.7 billion
Transistors
1.04 billion
232 mm²
Die Size
166 mm²

Graphics Features

12 (12_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
2.1
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
6.4
Shader Model
5.0

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