AMD Radeon HD 7990 vs NVIDIA RTX A400

VS

AMD Radeon HD 7990

NVIDIA RTX A400

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 4GB VRAM RTX A400 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

Larger VRAM bandwidth (288.0GB/s vs 96.00GB/s)

1280 additional rendering cores

NVIDIA RTX A400 's Advantages

Released 11 years late

Boost Clock has increased by 76% (1762MHz vs 1000MHz)

More VRAM (4GB vs 3GB)

Lower TDP (50W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +51%

4.096 TFLOPS

RTX A400

2.706 TFLOPS

Radeon HD 7990

VS

RTX A400

Graphics Card

Apr 2013

Release Date

Apr 2024

Southern Islands

Generation

Quadro Ampere(Ax000)

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

950 MHz

Base Clock

1417 MHz

1000 MHz

Boost Clock

1762 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

64bit

288.0GB/s

Bandwidth

96.00GB/s

Render Config

32

Compute Units

-

SM Count

6

2048

Shading Units

768

128

TMUs

24

32

ROPs

16

-

Tensor Cores

24

-

RT Cores

6

16 KB (per CU)

L1 Cache

128 KB (per SM)

768 KB

L2 Cache

2 MB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

28.19 GPixel/s

128.0 GTexel/s

Texture Rate

42.29 GTexel/s

-

FP16 (half)

2.706 TFLOPS

4.096 TFLOPS

FP32 (float)

2.706 TFLOPS

1024 GFLOPS

FP64 (double)

42.29 GFLOPS

Board Design

375W

TDP

50W

750 W

Suggested PSU

250 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

4x mini-DisplayPort 1.4a

2x 8-pin

Power Connectors

None

Graphics Processor

Malta

GPU Name

GA107

Malta XT (215-0849026)

GPU Variant

-

GCN 1.0

Architecture

Ampere

TSMC

Foundry

Samsung

28 nm

Process Size

8 nm

4.313 billion

Transistors

8.7 billion

365 mm²

Die Size

200 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

3.0

1.2

Vulkan

1.3

-

CUDA

8.6

5.1

Shader Model

6.8

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