AMD Radeon RX 6600 XT vs ATI Radeon HD 2900 XTX

VS

AMD Radeon RX 6600 XT ATI Radeon HD 2900 XTX

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 512MB VRAM Radeon HD 2900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 XT 's Advantages

Boost Clock2589MHz

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

1728 additional rendering cores

Lower TDP (160W vs 240W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +2126%

10.6 TFLOPS

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 2900 XTX

Graphics Card

Jul 2021

Release Date

Unknown

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

-

SM Count

-

32

Compute Units

4

2048

Shading Units

320

128

TMUs

16

64

ROPs

16

-

Tensor Cores

-

32

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

256 KB

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)

-

Graphics Processor

Navi 23

GPU Name

R600

Navi 23 XT (215-130000006)

GPU Variant

R600 XTX A11 (215RGMDKA11FG)

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

Board Design

160W

TDP

240W

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

2x 6-pin

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

-

CUDA

-

6.7

Shader Model

4.0

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