AMD Radeon HD 6870 vs AMD Radeon RX 7900 XT

VS

AMD Radeon HD 6870

AMD Radeon RX 7900 XT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 and 20GB VRAM Radeon RX 7900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 's Advantages

Lower TDP (151W vs 300W)

AMD Radeon RX 7900 XT 's Advantages

Released 12 years and 1 months late

Boost Clock2394MHz

More VRAM (20GB vs 1024GB)

Larger VRAM bandwidth (800.0GB/s vs 134.4GB/s)

4256 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6870

2.016 TFLOPS

Radeon RX 7900 XT +2453%

51.48 TFLOPS

Radeon HD 6870

VS

Radeon RX 7900 XT

Graphics Card

Oct 2010

Release Date

Nov 2022

Northern Islands

Generation

Navi III

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1387 MHz

-

Boost Clock

2394 MHz

1050 MHz

Memory Clock

2500 MHz

Memory

1024MB

Memory Size

20GB

GDDR5

Memory Type

GDDR6

256bit

Memory Bus

320bit

134.4GB/s

Bandwidth

800.0GB/s

Render Config

14

Compute Units

84

-

1120

Shading Units

5376

56

TMUs

336

32

ROPs

192

-

RT Cores

84

8 KB (per CU)

L1 Cache

256 KB per Array

512 KB

L2 Cache

6 MB

-

L3 Cache

80 MB

Theoretical Performance

28.80 GPixel/s

Pixel Rate

459.6 GPixel/s

50.40 GTexel/s

Texture Rate

804.4 GTexel/s

-

FP16 (half)

103.0 TFLOPS

2.016 TFLOPS

FP32 (float)

51.48 TFLOPS

-

FP64 (double)

1.609 TFLOPS

Board Design

151W

TDP

300W

450 W

Suggested PSU

700 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 8-pin

Graphics Processor

Barts

GPU Name

Navi 31

Barts XT (215-0798000)

GPU Variant

Navi 31 XT (215-145000156)

TeraScale 2

Architecture

RDNA 3.0

TSMC

Foundry

TSMC

40 nm

Process Size

5 nm

1.7 billion

Transistors

57.7 billion

255 mm²

Die Size

529 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.2

N/A

Vulkan

1.3

-

5.0

Shader Model

6.7

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