AMD Radeon RX 6600 XT vs AMD Radeon HD 6850

VS

AMD Radeon RX 6600 XT AMD Radeon HD 6850

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 1024MB VRAM Radeon HD 6850 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 10 years and 9 months late

Boost Clock2589MHz

More VRAM (8GB vs 1GB)

Larger VRAM bandwidth (256.0GB/s vs 128.0GB/s)

1088 additional rendering cores

AMD Radeon HD 6850 's Advantages

Lower TDP (127W vs 160W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +612%

10.6 TFLOPS

Radeon HD 6850

1.488 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 6850

Graphics Card

Jul 2021

Release Date

Oct 2010

Navi II

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1968 MHz

Base Clock

-

2589 MHz

Boost Clock

-

2000 MHz

Memory Clock

1000 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

GDDR5

128bit

Memory Bus

256bit

256.0GB/s

Bandwidth

128.0GB/s

Render Config

-

SM Count

-

32

Compute Units

12

2048

Shading Units

960

128

TMUs

48

64

ROPs

32

-

Tensor Cores

-

32

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

512 KB

Theoretical Performance

165.7 GPixel/s

Pixel Rate

24.80 GPixel/s

331.4 GTexel/s

Texture Rate

37.20 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

1488 GFLOPS

662.8 GFLOPS

FP64 (double)

-

Graphics Processor

Navi 23

GPU Name

Barts

Navi 23 XT (215-130000006)

GPU Variant

Barts PRO (215-0798006)

RDNA 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

11.06 billion

Transistors

1.7 billion

237 mm²

Die Size

255 mm²

Board Design

160W

TDP

127W

450 W

Suggested PSU

300 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

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

1x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.1

OpenCL

1.2

1.3

Vulkan

N/A

-

CUDA

-

6.7

Shader Model

5.0

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