AMD Radeon RX 6600 XT vs NVIDIA GeForce GT 420 OEM

VS

AMD Radeon RX 6600 XT

NVIDIA GeForce GT 420 OEM

We compared two Desktop platform GPUs: 8GB VRAM Radeon RX 6600 XT and 1024MB VRAM GeForce GT 420 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 10 years and 10 months late

Boost Clock2589MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (256.0GB/s vs 28.80GB/s)

2000 additional rendering cores

NVIDIA GeForce GT 420 OEM 's Advantages

Lower TDP (50W vs 160W)

Score

Benchmark

FP32 (float)

Radeon RX 6600 XT +7810%

10.6 TFLOPS

GeForce GT 420 OEM

0.134 TFLOPS

Radeon RX 6600 XT

VS

GeForce GT 420 OEM

Graphics Card

Jul 2021

Release Date

Sep 2010

Navi II

Generation

GeForce 400

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

128bit

256.0GB/s

Bandwidth

28.80GB/s

Render Config

32

Compute Units

-

SM Count

1

2048

Shading Units

48

128

TMUs

4

64

ROPs

4

-

32

RT Cores

-

128 KB per Array

L1 Cache

64 KB (per SM)

2 MB

L2 Cache

256 KB

32 MB

L3 Cache

-

Theoretical Performance

165.7 GPixel/s

Pixel Rate

1.400 GPixel/s

331.4 GTexel/s

Texture Rate

2.800 GTexel/s

21.21 TFLOPS

FP16 (half)

-

10.60 TFLOPS

FP32 (float)

134.4 GFLOPS

662.8 GFLOPS

FP64 (double)

11.20 GFLOPS

Board Design

160W

TDP

50W

450 W

Suggested PSU

250 W

1x HDMI 2.1 3x DisplayPort 1.4a

Outputs

1x DVI 1x HDMI 1.3a 1x VGA

1x 8-pin

Power Connectors

None

Graphics Processor

Navi 23

GPU Name

GF108

Navi 23 XT (215-130000006)

GPU Variant

GF108-200-A1

RDNA 2.0

Architecture

Fermi

TSMC

Foundry

TSMC

7 nm

Process Size

40 nm

11.06 billion

Transistors

0.585 billion

237 mm²

Die Size

116 mm²

Graphics Features

12 Ultimate (12_2)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.3

Vulkan

N/A

-

CUDA

2.1

6.7

Shader Model

5.1

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