AMD Radeon RX 7800M vs ATI Mobility Radeon HD 3870 X2

VS

AMD Radeon RX 7800M

ATI Mobility Radeon HD 3870 X2

We compared two Mobile platform GPUs: 12GB VRAM Radeon RX 7800M and 512MB VRAM Mobility Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7800M 's Advantages

Released 16 years late

Boost Clock2145MHz

More VRAM (12GB vs 512GB)

Larger VRAM bandwidth (432GB/s vs 54.40GB/s)

3520 additional rendering cores

ATI Mobility Radeon HD 3870 X2 's Advantages

Lower TDP (110W vs 180W)

Score

Benchmark

FP32 (float)

Radeon RX 7800M +8400%

35.87 TFLOPS

Mobility Radeon HD 3870 X2

0.422 TFLOPS

Radeon RX 7800M

VS

Mobility Radeon HD 3870 X2

Graphics Card

Sep 2024

Release Date

Sep 2008

Navi Mobile

Generation

M8x

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1825 MHz

Base Clock

-

2145 MHz

Boost Clock

-

2250 MHz

Memory Clock

850 MHz

Memory

12GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

192bit

Memory Bus

256bit

432GB/s

Bandwidth

54.40GB/s

Render Config

60

Compute Units

4

-

3840

Shading Units

320

240

TMUs

16

96

ROPs

16

-

60

RT Cores

-

256 KB per Array

L1 Cache

-

6 MB

L2 Cache

256 KB

48 MB

L3 Cache

-

Theoretical Performance

401.3 GPixel/s

Pixel Rate

10.56 GPixel/s

560.4 GTexel/s

Texture Rate

10.56 GTexel/s

71.73 TFLOPS

FP16 (half)

-

35.87 TFLOPS

FP32 (float)

422.4 GFLOPS

1121 GFLOPS

FP64 (double)

84.48 GFLOPS

Board Design

180W

TDP

110W

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

Navi 32

GPU Name

M88

Navi 32

GPU Variant

-

RDNA 3.0

Architecture

TeraScale

TSMC

Foundry

TSMC

5 nm

Process Size

55 nm

28.1 billion

Transistors

0.666 billion

529 mm²

Die Size

192 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

2.2

OpenCL

N/A

1.3

Vulkan

N/A

-

6.7

Shader Model

4.1

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