AMD Radeon RX 6600 XT vs ATI Radeon HD 2900 GT

VS

AMD Radeon RX 6600 XT

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 256MB VRAM Radeon HD 2900 GT 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 13 years and 8 months late

Boost Clock2589MHz

More VRAM (8GB vs 256GB)

Larger VRAM bandwidth (256.0GB/s vs 51.20GB/s)

1808 additional rendering cores

ATI Radeon HD 2900 GT 's Advantages

Lower TDP (150W vs 160W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +3580%

10.6 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 2900 GT

Graphics Card

Jul 2021

Release Date

Nov 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

800 MHz

Memory

8GB

Memory Size

256MB

GDDR6

Memory Type

GDDR3

128bit

Memory Bus

256bit

256.0GB/s

Bandwidth

51.20GB/s

Render Config

32

Compute Units

3

-

2048

Shading Units

240

128

TMUs

12

64

ROPs

12

-

32

RT Cores

-

128 KB per Array

L1 Cache

-

2 MB

L2 Cache

128 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

7.212 GPixel/s

331.4 GTexel/s

Texture Rate

7.212 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

288.5 GFLOPS

662.8 GFLOPS

FP64 (double)

-

Board Design

160W

TDP

150W

450 W

Suggested PSU

450 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

2x DVI 1x S-Video

1x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Navi 23

GPU Name

R600

Navi 23 XT (215-130000006)

GPU Variant

R600 GT (215RGFDKA13FG)

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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