AMD Radeon RX 7900 XT vs AMD Radeon HD 6490

VS

AMD Radeon RX 7900 XT

AMD Radeon HD 6490

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 1024MB VRAM Radeon HD 6490 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 7900 XT 's Advantages

Released 11 years and 4 months late

Boost Clock2394MHz

More VRAM (20GB vs 1024GB)

Larger VRAM bandwidth (800.0GB/s vs 16.00GB/s)

5056 additional rendering cores

AMD Radeon HD 6490 's Advantages

Lower TDP (39W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +14525%

51.48 TFLOPS

Radeon HD 6490

0.352 TFLOPS

Radeon RX 7900 XT

VS

Radeon HD 6490

Graphics Card

Nov 2022

Release Date

Jul 2011

Navi III

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 4.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

1387 MHz

Base Clock

-

2394 MHz

Boost Clock

-

2500 MHz

Memory Clock

500 MHz

Memory

20GB

Memory Size

1024MB

GDDR6

Memory Type

DDR2

320bit

Memory Bus

128bit

800.0GB/s

Bandwidth

16.00GB/s

Render Config

84

Compute Units

4

-

5376

Shading Units

320

336

TMUs

16

192

ROPs

8

-

84

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

256 KB

80 MB

L3 Cache

-

Theoretical Performance

459.6 GPixel/s

Pixel Rate

4.400 GPixel/s

804.4 GTexel/s

Texture Rate

8.800 GTexel/s

103.0 TFLOPS

FP16 (half)

-

51.48 TFLOPS

FP32 (float)

352.0 GFLOPS

1.609 TFLOPS

FP64 (double)

-

Board Design

300W

TDP

39W

700 W

Suggested PSU

200 W

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

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

2x 8-pin

Power Connectors

None

Graphics Processor

Navi 31

GPU Name

Redwood

Navi 31 XT (215-145000156)

GPU Variant

Redwood LE

RDNA 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

0.627 billion

529 mm²

Die Size

104 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

2.2

OpenCL

1.2

1.3

Vulkan

N/A

-

6.7

Shader Model

5.0

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