AMD Radeon RX 6400 vs ATI Radeon HD 2900 XT

VS

AMD Radeon RX 6400

ATI Radeon HD 2900 XT

We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 512MB VRAM Radeon HD 2900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6400 's Advantages

Released 14 years and 8 months late

Boost Clock2321MHz

More VRAM (4GB vs 512GB)

Larger VRAM bandwidth (128.0GB/s vs 106.0GB/s)

448 additional rendering cores

Lower TDP (53W vs 215W)

Score

Benchmark

FP32 (float)

Radeon RX 6400 +648%

3.565 TFLOPS

Radeon HD 2900 XT

0.476 TFLOPS

Radeon RX 6400

VS

Radeon HD 2900 XT

Graphics Card

Jan 2022

Release Date

May 2007

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x4

Bus Interface

PCIe 1.0 x16

Clock Speeds

1923 MHz

Base Clock

-

2321 MHz

Boost Clock

-

2000 MHz

Memory Clock

828 MHz

Memory

4GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

64bit

Memory Bus

512bit

128.0GB/s

Bandwidth

106.0GB/s

Render Config

12

Compute Units

4

-

768

Shading Units

320

48

TMUs

16

32

ROPs

16

-

12

RT Cores

-

128 KB per Array

L1 Cache

-

1024 KB

L2 Cache

256 KB

16 MB

L3 Cache

-

Theoretical Performance

74.27 GPixel/s

Pixel Rate

11.89 GPixel/s

111.4 GTexel/s

Texture Rate

11.89 GTexel/s

7.130 TFLOPS

FP16 (half)

-

3.565 TFLOPS

FP32 (float)

475.5 GFLOPS

222.8 GFLOPS

FP64 (double)

-

Board Design

53W

TDP

215W

250 W

Suggested PSU

550 W

1x HDMI 2.1 1x DisplayPort 1.4a

Outputs

2x DVI 1x S-Video

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Navi 24

GPU Name

R600

Navi 24 XL (215-135000046)

GPU Variant

R600 XT (215RGMDKA13FG)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

6 nm

Process Size

80 nm

5.4 billion

Transistors

0.72 billion

107 mm²

Die Size

420 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.2

OpenCL

N/A

1.3

Vulkan

N/A

-

6.7

Shader Model

4.0

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