AMD Radeon RX 7900M vs AMD Radeon HD 6870M

VS

We compared two Mobile platform GPUs: 16GB VRAM Radeon RX 7900M 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 7900M 's Advantages

Released 12 years and 9 months late

Boost Clock2090MHz

More VRAM (16GB vs 1GB)

Larger VRAM bandwidth (576.0GB/s vs 64.00GB/s)

3808 additional rendering cores

AMD Radeon HD 6870M 's Advantages

Lower TDP (50W vs 180W)

Score

Benchmark

FP32 (float)

Radeon RX 7900M +3466%

38.52 TFLOPS

Radeon HD 6870M

1.08 TFLOPS

Radeon RX 7900M

VS

Radeon HD 6870M

Graphics Card

Oct 2023

Release Date

Jan 2011

Navi Mobile

Generation

Vancouver

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

1825 MHz

Base Clock

-

2090 MHz

Boost Clock

-

2250 MHz

Memory Clock

1000 MHz

Memory

16GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

576.0GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

72

Compute Units

10

4608

Shading Units

800

288

TMUs

40

192

ROPs

16

-

Tensor Cores

-

72

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

256 KB

Theoretical Performance

401.3 GPixel/s

Pixel Rate

10.80 GPixel/s

601.9 GTexel/s

Texture Rate

27.00 GTexel/s

77.05 TFLOPS

FP16 (half)

-

38.52 TFLOPS

FP32 (float)

1080 GFLOPS

1204 GFLOPS

FP64 (double)

-

Graphics Processor

Navi 31

GPU Name

Granville

Navi 31

GPU Variant

Granville XT (216-0769024)

RDNA 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

1.04 billion

529 mm²

Die Size

166 mm²

Board Design

180W

TDP

50W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.2

OpenCL

1.2

1.3

Vulkan

N/A

-

CUDA

-

6.7

Shader Model

5.0

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