AMD Radeon HD 6870 X2 vs AMD Radeon RX 6900 XTX

VS

AMD Radeon HD 6870 X2

AMD Radeon RX 6900 XTX

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 X2 and 16GB VRAM Radeon RX 6900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 X2 's Advantages

Lower TDP (300W vs 330W)

AMD Radeon RX 6900 XTX 's Advantages

Boost Clock2435MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (576.0GB/s vs 134.4GB/s)

4000 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6870 X2

2.016 TFLOPS

Radeon RX 6900 XTX +1136%

24.93 TFLOPS

Radeon HD 6870 X2

VS

Radeon RX 6900 XTX

Graphics Card

Jul 2011

Release Date

Unknown

Northern Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

2075 MHz

-

Boost Clock

2435 MHz

1050 MHz

Memory Clock

2250 MHz

Memory

1024MB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

576.0GB/s

Render Config

14

Compute Units

80

-

1120

Shading Units

5120

56

TMUs

320

32

ROPs

128

-

RT Cores

80

8 KB (per CU)

L1 Cache

128 KB per Array

512 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

311.7 GPixel/s

50.40 GTexel/s

Texture Rate

779.2 GTexel/s

-

FP16 (half)

49.87 TFLOPS

2.016 TFLOPS

FP32 (float)

24.93 TFLOPS

-

FP64 (double)

1.558 TFLOPS

Board Design

300W

TDP

330W

700 W

Suggested PSU

700 W

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

Outputs

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

-

Power Connectors

2x 8-pin

Graphics Processor

Barts

GPU Name

Navi 21

Barts XT (215-0798000)

GPU Variant

Navi 21 XTXH (215-121000247)

TeraScale 2

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

7 nm

1.7 billion

Transistors

26.8 billion

255 mm²

Die Size

520 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.3

-

5.0

Shader Model

6.5

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