NVIDIA GeForce RTX 4090 vs AMD Radeon HD 7990

VS

NVIDIA GeForce RTX 4090 AMD Radeon HD 7990

We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 4090 and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce RTX 4090's Advantages

Released 9 years and 5 months late

Boost Clock has increased by 152% (2520MHz vs 1000MHz)

More VRAM (24GB vs 3GB)

Larger VRAM bandwidth (1008GB/s vs 288.0GB/s)

14336 additional rendering cores

AMD Radeon HD 7990's Advantages

Lower TDP (375W vs 450W)

Score

Benchmark

FP32 (float)

GeForce RTX 4090 +1916%

82.58 TFLOPS

Radeon HD 7990

4.096 TFLOPS

GeForce RTX 4090

VS

Radeon HD 7990

Graphics Card

Sep 2022

Release Date

Apr 2013

GeForce 40

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2235MHz

Base Clock

950MHz

2520MHz

Boost Clock

1000MHz

1313MHz

Memory Clock

1500MHz

Memory

24GB

Memory Size

3GB

GDDR6X

Memory Type

GDDR5

384bit

Memory Bus

384bit

1008 GB/s

Bandwidth

288.0 GB/s

Render Config

128

SM Count

-

Compute Units

32

16384

Shading Units

2048

512

TMUs

128

176

ROPs

32

512

Tensor Cores

-

128

RT Cores

-

128 KB (per SM)

L1 Cache

16 KB (per CU)

72MB

L2 Cache

768KB

Theoretical Performance

443.5 GPixel/s

Pixel Rate

32.00 GPixel/s

1290 GTexel/s

Texture Rate

128.0 GTexel/s

82.58 TFLOPS

FP16 (half)

-

82.58 TFLOPS

FP32 (float)

4.096 TFLOPS

1290 GFLOPS

FP64 (double)

1024 GFLOPS

Graphics Processor

AD102

GPU Name

Malta

AD102-300-A1

GPU Variant

Malta XT (215-0849026)

Ada Lovelace

Architecture

GCN 1.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

76,300 million

Transistors

4,313 million

609mm²

Die Size

365mm²

Board Design

450W

TDP

375W

850W

Suggested PSU

750W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 16-pin

Power Connectors

2x 8-pin

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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