AMD Radeon HD 6490 vs AMD Radeon RX 6800

VS

AMD Radeon HD 6490

AMD Radeon RX 6800

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6490 and 16GB VRAM Radeon RX 6800 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6490 's Advantages

Lower TDP (39W vs 250W)

AMD Radeon RX 6800 's Advantages

Released 9 years and 3 months late

Boost Clock2105MHz

More VRAM (16GB vs 1024GB)

Larger VRAM bandwidth (512.0GB/s vs 16.00GB/s)

3520 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6490

0.352 TFLOPS

Radeon RX 6800 +4493%

16.17 TFLOPS

Radeon HD 6490

VS

Radeon RX 6800

Graphics Card

Jul 2011

Release Date

Oct 2020

Northern Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

-

Base Clock

1700 MHz

-

Boost Clock

2105 MHz

500 MHz

Memory Clock

2000 MHz

Memory

1024MB

Memory Size

16GB

DDR2

Memory Type

GDDR6

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

512.0GB/s

Render Config

4

Compute Units

60

-

320

Shading Units

3840

16

TMUs

240

8

ROPs

96

-

RT Cores

60

8 KB (per CU)

L1 Cache

128 KB per Array

256 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

4.400 GPixel/s

Pixel Rate

202.1 GPixel/s

8.800 GTexel/s

Texture Rate

505.2 GTexel/s

-

FP16 (half)

32.33 TFLOPS

352.0 GFLOPS

FP32 (float)

16.17 TFLOPS

-

FP64 (double)

1010 GFLOPS

Board Design

39W

TDP

250W

200 W

Suggested PSU

600 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

None

Power Connectors

2x 8-pin

Graphics Processor

Redwood

GPU Name

Navi 21

Redwood LE

GPU Variant

Navi 21 XL (215-121000187)

TeraScale 2

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

7 nm

0.627 billion

Transistors

26.8 billion

104 mm²

Die Size

520 mm²

Graphics Features

11.2 (11_0)

DirectX

12 Ultimate (12_2)

4.4

OpenGL

4.6

1.2

OpenCL

2.1

N/A

Vulkan

1.3

-

5.0

Shader Model

6.5

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