AMD Radeon RX 6900 XTX vs ATI Radeon HD 3850 AGP

VS

AMD Radeon RX 6900 XTX

ATI Radeon HD 3850 AGP

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 512MB VRAM Radeon HD 3850 AGP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 512GB)

Larger VRAM bandwidth (576.0GB/s vs 52.99GB/s)

4800 additional rendering cores

ATI Radeon HD 3850 AGP 's Advantages

Lower TDP (75W vs 330W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +5724%

24.93 TFLOPS

Radeon HD 3850 AGP

0.428 TFLOPS

Radeon RX 6900 XTX

VS

Radeon HD 3850 AGP

Graphics Card

Unknown

Release Date

Jan 2008

Navi II

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

AGP 8x

Clock Speeds

2075 MHz

Base Clock

-

2435 MHz

Boost Clock

-

2250 MHz

Memory Clock

828 MHz

Memory

16GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

256bit

Memory Bus

256bit

576.0GB/s

Bandwidth

52.99GB/s

Render Config

80

Compute Units

4

-

5120

Shading Units

320

TMUs

16

128

ROPs

16

-

80

RT Cores

-

128 KB per Array

L1 Cache

-

4 MB

L2 Cache

256 KB

128 MB

L3 Cache

-

Theoretical Performance

311.7 GPixel/s

Pixel Rate

10.69 GPixel/s

779.2 GTexel/s

Texture Rate

10.69 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

427.5 GFLOPS

1.558 TFLOPS

FP64 (double)

85.50 GFLOPS

Board Design

330W

TDP

75W

700 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

2x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

Navi 21

GPU Name

RV670

Navi 21 XTXH (215-121000247)

GPU Variant

RV670 PRO (215-0708003)

RDNA 2.0

Architecture

TeraScale

TSMC

Foundry

TSMC

7 nm

Process Size

55 nm

26.8 billion

Transistors

0.666 billion

520 mm²

Die Size

192 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3 (full) 4.0 (partial)

2.1

OpenCL

N/A

1.3

Vulkan

N/A

-

6.5

Shader Model

4.1

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