AMD Radeon RX 7900 XTX vs AMD Radeon HD 7870 GHz Edition

VS

AMD Radeon RX 7900 XTX

AMD Radeon HD 7870 GHz Edition

We compared two Desktop platform GPUs: 24GB VRAM Radeon RX 7900 XTX and 2GB VRAM Radeon HD 7870 GHz Edition 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 10 years and 8 months late

Boost Clock2498MHz

More VRAM (24GB vs 2GB)

Larger VRAM bandwidth (960.0GB/s vs 153.6GB/s)

4864 additional rendering cores

AMD Radeon HD 7870 GHz Edition 's Advantages

Lower TDP (175W vs 355W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XTX +2298%

61.39 TFLOPS

Radeon HD 7870 GHz Edition

2.56 TFLOPS

Radeon RX 7900 XTX

VS

Radeon HD 7870 GHz Edition

Graphics Card

Nov 2022

Release Date

Mar 2012

Navi III

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

1929 MHz

Base Clock

-

2498 MHz

Boost Clock

-

2500 MHz

Memory Clock

1200 MHz

Memory

24GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

384bit

Memory Bus

256bit

960.0GB/s

Bandwidth

153.6GB/s

Render Config

96

Compute Units

20

-

6144

Shading Units

1280

384

TMUs

80

192

ROPs

32

-

96

RT Cores

-

256 KB per Array

L1 Cache

16 KB (per CU)

6 MB

L2 Cache

512 KB

96 MB

L3 Cache

-

Theoretical Performance

479.6 GPixel/s

Pixel Rate

32.00 GPixel/s

959.2 GTexel/s

Texture Rate

80.00 GTexel/s

122.8 TFLOPS

FP16 (half)

-

61.39 TFLOPS

FP32 (float)

2.560 TFLOPS

1.918 TFLOPS

FP64 (double)

160.0 GFLOPS

Board Design

355W

TDP

175W

750 W

Suggested PSU

450 W

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

Outputs

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Navi 31

GPU Name

Pitcairn

Navi 31 XTX (215-145000146)

GPU Variant

Pitcairn XT (215-0828047)

RDNA 3.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

5 nm

Process Size

28 nm

57.7 billion

Transistors

2.8 billion

529 mm²

Die Size

212 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.2

OpenCL

1.2

1.3

Vulkan

1.2

-

6.7

Shader Model

5.1

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