ATI Radeon HD 2900 XTX vs AMD Radeon RX 6800 XT

VS

ATI Radeon HD 2900 XTX

AMD Radeon RX 6800 XT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 2900 XTX and 16GB VRAM Radeon RX 6800 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 2900 XTX 's Advantages

Lower TDP (240W vs 300W)

AMD Radeon RX 6800 XT 's Advantages

Boost Clock2250MHz

More VRAM (16GB vs 512GB)

Larger VRAM bandwidth (512.0GB/s vs 106.0GB/s)

4288 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 2900 XTX

0.476 TFLOPS

Radeon RX 6800 XT +4257%

20.74 TFLOPS

Radeon HD 2900 XTX

VS

Radeon RX 6800 XT

Graphics Card

Unknown

Release Date

Oct 2020

Radeon R600

Generation

Navi II

Desktop

Type

Desktop

PCIe 1.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1825 MHz

-

Boost Clock

2250 MHz

828 MHz

Memory Clock

2000 MHz

Memory

512MB

Memory Size

16GB

GDDR3

Memory Type

GDDR6

512bit

Memory Bus

256bit

106.0GB/s

Bandwidth

512.0GB/s

Render Config

4

Compute Units

72

-

320

Shading Units

4608

16

TMUs

288

16

ROPs

128

-

RT Cores

72

-

L1 Cache

128 KB per Array

256 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

11.89 GPixel/s

Pixel Rate

288.0 GPixel/s

11.89 GTexel/s

Texture Rate

648.0 GTexel/s

-

FP16 (half)

41.47 TFLOPS

475.5 GFLOPS

FP32 (float)

20.74 TFLOPS

-

FP64 (double)

1296 GFLOPS

Board Design

240W

TDP

300W

550 W

Suggested PSU

700 W

2x DVI 1x S-Video

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

R600

GPU Name

Navi 21

R600 XTX A11 (215RGMDKA11FG)

GPU Variant

Navi 21 XT (215-121000177)

TeraScale

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

80 nm

Process Size

7 nm

0.72 billion

Transistors

26.8 billion

420 mm²

Die Size

520 mm²

Graphics Features

10.0 (10_0)

DirectX

12 Ultimate (12_2)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

2.1

N/A

Vulkan

1.3

-

4.0

Shader Model

6.5

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