NVIDIA GeForce RTX 4090 Max-Q vs AMD Radeon HD 7870M

VS

NVIDIA GeForce RTX 4090 Max-Q

AMD Radeon HD 7870M

We compared two Mobile platform GPUs: 16GB VRAM GeForce RTX 4090 Max Q and 2GB VRAM Radeon HD 7870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4090 Max-Q 's Advantages

Released 10 years and 9 months late

Boost Clock1455MHz

More VRAM (16GB vs 2GB)

Larger VRAM bandwidth (448.0GB/s vs 64.00GB/s)

9088 additional rendering cores

AMD Radeon HD 7870M 's Advantages

Lower TDP (45W vs 80W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 Max Q +2664%

28.31 TFLOPS

Radeon HD 7870M

1.024 TFLOPS

GeForce RTX 4090 Max Q

VS

Radeon HD 7870M

Graphics Card

Jan 2023

Release Date

Apr 2012

GeForce 40 Mobile

Generation

London

Mobile

Type

Mobile

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

930 MHz

Base Clock

-

1455 MHz

Boost Clock

-

1750 MHz

Memory Clock

1000 MHz

Memory

16GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

128bit

448.0GB/s

Bandwidth

64.00GB/s

Render Config

-

Compute Units

10

76

SM Count

-

9728

Shading Units

640

304

TMUs

40

112

ROPs

16

304

Tensor Cores

-

76

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per CU)

64 MB

L2 Cache

256 KB

-

Theoretical Performance

163.0 GPixel/s

Pixel Rate

12.80 GPixel/s

442.3 GTexel/s

Texture Rate

32.00 GTexel/s

28.31 TFLOPS

FP16 (half)

-

28.31 TFLOPS

FP32 (float)

1024 GFLOPS

442.3 GFLOPS

FP64 (double)

64.00 GFLOPS

Board Design

80W

TDP

45W

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

-

Graphics Processor

AD103

GPU Name

Heathrow

GN21-X11

GPU Variant

Heathrow XT (216-0835033)

Ada Lovelace

Architecture

GCN 1.0

TSMC

Foundry

TSMC

4 nm

Process Size

28 nm

45.9 billion

Transistors

1.5 billion

379 mm²

Die Size

123 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

3.0

OpenCL

1.2

1.3

Vulkan

1.2

8.9

CUDA

-

6.7

Shader Model

5.1

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