AMD Radeon RX 6600 XT vs AMD Radeon HD 8490 OEM

VS

AMD Radeon RX 6600 XT

AMD Radeon HD 8490 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 1024MB VRAM Radeon HD 8490 OEM 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 late

Boost Clock2589MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (256.0GB/s vs 14.40GB/s)

1888 additional rendering cores

AMD Radeon HD 8490 OEM 's Advantages

Lower TDP (35W vs 160W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +3685%

10.6 TFLOPS

Radeon HD 8490 OEM

0.28 TFLOPS

Radeon RX 6600 XT

VS

Radeon HD 8490 OEM

Graphics Card

Jul 2021

Release Date

Jul 2013

Navi II

Generation

Sea 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

900 MHz

Memory

8GB

Memory Size

1024MB

GDDR6

Memory Type

DDR3

128bit

Memory Bus

64bit

256.0GB/s

Bandwidth

14.40GB/s

Render Config

32

Compute Units

2

-

2048

Shading Units

160

128

TMUs

8

64

ROPs

4

-

32

RT Cores

-

128 KB per Array

L1 Cache

8 KB (per CU)

2 MB

L2 Cache

128 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

3.500 GPixel/s

331.4 GTexel/s

Texture Rate

7.000 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

280.0 GFLOPS

662.8 GFLOPS

FP64 (double)

-

Board Design

160W

TDP

35W

450 W

Suggested PSU

200 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

1x DVI 1x DisplayPort 1.1

1x 8-pin

Power Connectors

None

Graphics Processor

Navi 23

GPU Name

Caicos

Navi 23 XT (215-130000006)

GPU Variant

Caicos XTX

RDNA 2.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

11.06 billion

Transistors

0.37 billion

237 mm²

Die Size

67 mm²

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

-

6.7

Shader Model

5.0

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