AMD Radeon RX 6900 XTX vs AMD Radeon R9 280X2

VS

AMD Radeon RX 6900 XTX

AMD Radeon R9 280X2

We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XTX and 3GB VRAM Radeon R9 280X2 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 Clock has increased by 144% (2435MHz vs 1000MHz)

More VRAM (16GB vs 3GB)

Larger VRAM bandwidth (576.0GB/s vs 288.0GB/s)

3072 additional rendering cores

Lower TDP (330W vs 375W)

Score

Benchmark

FP32 (float)

Radeon RX 6900 XTX +508%

24.93 TFLOPS

Radeon R9 280X2

4.096 TFLOPS

Radeon RX 6900 XTX

VS

Radeon R9 280X2

Graphics Card

Unknown

Release Date

Unknown

Navi II

Generation

Volcanic Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

2075 MHz

Base Clock

950 MHz

2435 MHz

Boost Clock

1000 MHz

2250 MHz

Memory Clock

1500 MHz

Memory

16GB

Memory Size

3GB

GDDR6

Memory Type

GDDR5

256bit

Memory Bus

384bit

576.0GB/s

Bandwidth

288.0GB/s

Render Config

80

Compute Units

32

-

5120

Shading Units

2048

320

TMUs

128

ROPs

32

-

80

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

4 MB

L2 Cache

768 KB

128 MB

L3 Cache

-

Theoretical Performance

311.7 GPixel/s

Pixel Rate

32.00 GPixel/s

779.2 GTexel/s

Texture Rate

128.0 GTexel/s

49.87 TFLOPS

FP16 (half)

-

24.93 TFLOPS

FP32 (float)

4.096 TFLOPS

1.558 TFLOPS

FP64 (double)

1024 GFLOPS

Board Design

330W

TDP

375W

700 W

Suggested PSU

750 W

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

Outputs

6x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

3x 8-pin

Graphics Processor

Navi 21

GPU Name

Tahiti

Navi 21 XTXH (215-121000247)

GPU Variant

Tahiti XTL (215-0821065)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

26.8 billion

Transistors

4.313 billion

520 mm²

Die Size

352 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

1.2

1.3

Vulkan

1.2

-

6.5

Shader Model

5.1

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