AMD Radeon RX 7900 XT vs AMD Radeon HD 6450 OEM

VS

AMD Radeon RX 7900 XT

AMD Radeon HD 6450 OEM

We compared two Desktop platform GPUs: 20GB VRAM Radeon RX 7900 XT and 512MB VRAM Radeon HD 6450 OEM 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 9 months late

Boost Clock2394MHz

More VRAM (20GB vs 512GB)

Larger VRAM bandwidth (800.0GB/s vs 8.528GB/s)

5216 additional rendering cores

AMD Radeon HD 6450 OEM 's Advantages

Lower TDP (18W vs 300W)

Score

Benchmark

FP32 (float)

Radeon RX 7900 XT +25640%

51.48 TFLOPS

Radeon HD 6450 OEM

0.2 TFLOPS

Radeon RX 7900 XT

VS

Radeon HD 6450 OEM

Graphics Card

Nov 2022

Release Date

Feb 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

533 MHz

Memory

20GB

Memory Size

512MB

GDDR6

Memory Type

GDDR3

320bit

Memory Bus

64bit

800.0GB/s

Bandwidth

8.528GB/s

Render Config

84

Compute Units

2

-

5376

Shading Units

160

336

TMUs

8

192

ROPs

4

-

84

RT Cores

-

256 KB per Array

L1 Cache

8 KB (per CU)

6 MB

L2 Cache

128 KB

80 MB

L3 Cache

-

Theoretical Performance

459.6 GPixel/s

Pixel Rate

2.500 GPixel/s

804.4 GTexel/s

Texture Rate

5.000 GTexel/s

103.0 TFLOPS

FP16 (half)

-

51.48 TFLOPS

FP32 (float)

200.0 GFLOPS

1.609 TFLOPS

FP64 (double)

-

Board Design

300W

TDP

18W

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

Caicos

Navi 31 XT (215-145000156)

GPU Variant

Junbonator

RDNA 3.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

5 nm

Process Size

40 nm

57.7 billion

Transistors

0.37 billion

529 mm²

Die Size

67 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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