AMD Radeon RX 6600 XT vs AMD Radeon HD 7870 XT

VS

AMD Radeon RX 6600 XT

AMD Radeon HD 7870 XT

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 2GB VRAM Radeon HD 7870 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 6600 XT 's Advantages

Released 8 years and 8 months late

Boost Clock has increased by 166% (2589MHz vs 975MHz)

More VRAM (8GB vs 2GB)

Larger VRAM bandwidth (256.0GB/s vs 192.0GB/s)

512 additional rendering cores

Lower TDP (160W vs 185W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +253%

10.6 TFLOPS

Radeon HD 7870 XT

2.995 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 7870 XT

Graphics Card

Jul 2021

Release Date

Nov 2012

Navi II

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1968 MHz

Base Clock

925 MHz

2589 MHz

Boost Clock

975 MHz

2000 MHz

Memory Clock

1500 MHz

Memory

8GB

Memory Size

2GB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

256bit

256.0GB/s

Bandwidth

192.0GB/s

Render Config

32

Compute Units

24

-

2048

Shading Units

1536

128

TMUs

96

64

ROPs

32

-

32

RT Cores

-

128 KB per Array

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

512 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

31.20 GPixel/s

331.4 GTexel/s

Texture Rate

93.60 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

2.995 TFLOPS

662.8 GFLOPS

FP64 (double)

748.8 GFLOPS

Board Design

160W

TDP

185W

450 W

Suggested PSU

450 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Navi 23

GPU Name

Tahiti

Navi 23 XT (215-130000006)

GPU Variant

Tahiti LE (215-0821122)

RDNA 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

7 nm

Process Size

28 nm

11.06 billion

Transistors

4.313 billion

237 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

-

6.7

Shader Model

5.1

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