AMD Radeon RX 7900 XTX vs AMD Radeon HD 6870

VS

AMD Radeon RX 7900 XTX

AMD Radeon HD 6870

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7900 XTX and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XTX 's Advantages

Released 12 years and 1 months late

Boost Clock2498MHz

More VRAM (24GB vs 1024GB)

Larger VRAM bandwidth (960.0GB/s vs 134.4GB/s)

5024 additional rendering cores

AMD Radeon HD 6870 's Advantages

Lower TDP (151W vs 355W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XTX +2945%

61.39 TFLOPS

Radeon HD 6870

2.016 TFLOPS

Radeon RX 7900 XTX

VS

Radeon HD 6870

Graphics Card

Nov 2022

Release Date

Oct 2010

Navi III

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1929 MHz

Base Clock

-

2498 MHz

Boost Clock

-

2500 MHz

Memory Clock

1050 MHz

Memory

24GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

256bit

960.0GB/s

Bandwidth

134.4GB/s

Render Config

96

Compute Units

14

-

6144

Shading Units

1120

384

TMUs

56

192

ROPs

32

-

96

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

512 KB

96 MB

L3 Cache

-

Theoretical Performance

479.6 GPixel/s

Pixel Rate

28.80 GPixel/s

959.2 GTexel/s

Texture Rate

50.40 GTexel/s

122.8 TFLOPS

FP16 (half)

-

61.39 TFLOPS

FP32 (float)

2.016 TFLOPS

1.918 TFLOPS

FP64 (double)

-

Board Design

355W

TDP

151W

750 W

Suggested PSU

450 W

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

Outputs

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

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Navi 31

GPU Name

Barts

Navi 31 XTX (215-145000146)

GPU Variant

Barts XT (215-0798000)

RDNA 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

1.7 billion

529 mm²

Die Size

255 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.2

OpenCL

1.2

1.3

Vulkan

N/A

-

6.7

Shader Model

5.0

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