AMD Radeon HD 6990 vs NVIDIA RTX A400

VS

AMD Radeon HD 6990

NVIDIA RTX A400

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6990 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 6990 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 96.00GB/s)

768 additional rendering cores

NVIDIA RTX A400 's Advantages

Released 13 years and 1 months late

Boost Clock1762MHz

More VRAM (4GB vs 2GB)

Lower TDP (50W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 6990

2.55 TFLOPS

RTX A400 +6%

2.706 TFLOPS

Radeon HD 6990

VS

RTX A400

Graphics Card

Mar 2011

Release Date

Apr 2024

Northern Islands

Generation

Quadro Ampere(Ax000)

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

1417 MHz

-

Boost Clock

1762 MHz

1250 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

64bit

160.0GB/s

Bandwidth

96.00GB/s

Render Config

24

Compute Units

-

SM Count

6

1536

Shading Units

768

96

TMUs

24

32

ROPs

16

-

Tensor Cores

24

-

RT Cores

6

8 KB (per CU)

L1 Cache

128 KB (per SM)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

26.56 GPixel/s

Pixel Rate

28.19 GPixel/s

79.68 GTexel/s

Texture Rate

42.29 GTexel/s

-

FP16 (half)

2.706 TFLOPS

2.550 TFLOPS

FP32 (float)

2.706 TFLOPS

637.4 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

Antilles

GPU Name

GA107

Antilles XT (215-0807027)

GPU Variant

-

TeraScale 3

Architecture

Ampere

TSMC

Foundry

Samsung

40 nm

Process Size

8 nm

2.64 billion

Transistors

8.7 billion

389 mm²

Die Size

200 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

3.0

N/A

Vulkan

1.3

-

CUDA

8.6

5.0

Shader Model

6.8

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