NVIDIA GeForce GT 640 vs AMD Radeon RX 550X

VS

NVIDIA GeForce GT 640

AMD Radeon RX 550X

We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 4GB VRAM Radeon RX 550X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550X 's Advantages

Released 6 years and 6 months late

Boost Clock1183MHz

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (96.00GB/s vs 28.51GB/s)

128 additional rendering cores

Lower TDP (50W vs 65W)

Score

Benchmark

FP32 (float)

GeForce GT 640

0.693 TFLOPS

Radeon RX 550X +74%

1.211 TFLOPS

GeForce GT 640

VS

Radeon RX 550X

Graphics Card

Jun 2012

Release Date

Dec 2018

GeForce 600

Generation

Polaris

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1100 MHz

-

Boost Clock

1183 MHz

891 MHz

Memory Clock

1500 MHz

Memory

2GB

Memory Size

4GB

DDR3

Memory Type

GDDR5

128bit

Memory Bus

128bit

28.51GB/s

Bandwidth

96.00GB/s

Render Config

-

Compute Units

8

-

384

Shading Units

512

32

TMUs

32

16

ROPs

16

-

16 KB (per SMX)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

7.216 GPixel/s

Pixel Rate

18.93 GPixel/s

28.86 GTexel/s

Texture Rate

37.86 GTexel/s

-

FP16 (half)

1211 GFLOPS

692.7 GFLOPS

FP32 (float)

1211 GFLOPS

28.86 GFLOPS

FP64 (double)

75.71 GFLOPS

Board Design

65W

TDP

50W

250 W

Suggested PSU

250 W

1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a

None

Power Connectors

None

Graphics Processor

GK107

GPU Name

Lexa

GK107-300-A2

GPU Variant

Lexa PRO (215-0904018)

Kepler

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

1.27 billion

Transistors

2.2 billion

118 mm²

Die Size

103 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

3.0

OpenCL

2.1

1.1

Vulkan

1.2

3.0

CUDA

-

5.1

Shader Model

6.4

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