AMD Radeon RX 6600 XT vs ATI Radeon HD 2900 XT

VS

AMD Radeon RX 6600 XT

ATI Radeon HD 2900 XT

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT 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 6600 XT 's Advantages

Released 14 years and 2 months late

Boost Clock2589MHz

More VRAM (8GB vs 512GB)

Larger VRAM bandwidth (256.0GB/s vs 106.0GB/s)

1728 additional rendering cores

Lower TDP (160W vs 215W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +2126%

10.6 TFLOPS

Radeon HD 2900 XT

0.476 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 2900 XT

Graphics Card

Jul 2021

Release Date

May 2007

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 1.0 x16

Clock Speeds

1968 MHz

Base Clock

-

2589 MHz

Boost Clock

-

2000 MHz

Memory Clock

828 MHz

Memory

8GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

128bit

Memory Bus

512bit

256.0GB/s

Bandwidth

106.0GB/s

Render Config

32

Compute Units

4

-

2048

Shading Units

320

128

TMUs

16

64

ROPs

16

-

32

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

11.89 GPixel/s

331.4 GTexel/s

Texture Rate

11.89 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

475.5 GFLOPS

662.8 GFLOPS

FP64 (double)

-

Board Design

160W

TDP

215W

450 W

Suggested PSU

550 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x S-Video

1x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Navi 23

GPU Name

R600

Navi 23 XT (215-130000006)

GPU Variant

R600 XT (215RGMDKA13FG)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

80 nm

11.06 billion

Transistors

0.72 billion

237 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)

2.1

OpenCL

N/A

1.3

Vulkan

N/A

-

6.7

Shader Model

4.0

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