NVIDIA GeForce GT 645 OEM vs AMD Radeon RX 6650 XT

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon RX 6650 XT

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 8GB VRAM Radeon RX 6650 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Lower TDP (102W vs 176W)

AMD Radeon RX 6650 XT 's Advantages

Released 10 years and 1 months late

Boost Clock2635MHz

More VRAM (8GB vs 1024GB)

Larger VRAM bandwidth (280.3GB/s vs 91.87GB/s)

1760 additional rendering cores

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon RX 6650 XT +1106%

10.79 TFLOPS

GeForce GT 645 OEM

VS

Radeon RX 6650 XT

Graphics Card

Apr 2012

Release Date

May 2022

GeForce 600

Generation

Navi II

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 4.0 x8

Clock Speeds

-

Base Clock

2055 MHz

-

Boost Clock

2635 MHz

957 MHz

Memory Clock

2190 MHz

Memory

1024MB

Memory Size

8GB

GDDR5

Memory Type

GDDR6

192bit

Memory Bus

128bit

91.87GB/s

Bandwidth

280.3GB/s

Render Config

-

Compute Units

32

6

SM Count

-

288

Shading Units

2048

48

TMUs

128

24

ROPs

64

-

RT Cores

32

64 KB (per SM)

L1 Cache

128 KB per Array

384 KB

L2 Cache

2 MB

-

L3 Cache

32 MB

Theoretical Performance

9.312 GPixel/s

Pixel Rate

168.6 GPixel/s

37.25 GTexel/s

Texture Rate

337.3 GTexel/s

-

FP16 (half)

21.59 TFLOPS

894.0 GFLOPS

FP32 (float)

10.79 TFLOPS

74.50 GFLOPS

FP64 (double)

674.6 GFLOPS

Board Design

102W

TDP

176W

300 W

Suggested PSU

450 W

2x DVI 1x mini-HDMI 1.3a

Outputs

1x HDMI 2.1 3x DisplayPort 1.4a

-

Power Connectors

1x 8-pin

Graphics Processor

GF114

GPU Name

Navi 23

-

GPU Variant

Navi 23 KXT (215-130000136)

Fermi 2.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

40 nm

Process Size

7 nm

1.95 billion

Transistors

11.06 billion

332 mm²

Die Size

237 mm²

Graphics Features

12 (11_0)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.1

OpenCL

2.1

N/A

Vulkan

1.3

2.1

CUDA

-

5.1

Shader Model

6.5

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