AMD Radeon RX 550 640SP vs NVIDIA GeForce GT 645 OEM

VS

AMD Radeon RX 550 640SP

NVIDIA GeForce GT 645 OEM

We compared two Desktop platform GPUs: 2GB VRAM Radeon RX 550 640SP and 1024MB VRAM GeForce GT 645 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon RX 550 640SP 's Advantages

Released 5 years and 6 months late

Boost Clock1071MHz

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (96.00GB/s vs 91.87GB/s)

352 additional rendering cores

Lower TDP (60W vs 102W)

Score

Benchmark

FP32 (float)

Radeon RX 550 640SP +53%

1.371 TFLOPS

GeForce GT 645 OEM

0.894 TFLOPS

Radeon RX 550 640SP

VS

GeForce GT 645 OEM

Graphics Card

Oct 2017

Release Date

Apr 2012

Polaris

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 2.0 x16

Clock Speeds

1019 MHz

Base Clock

-

1071 MHz

Boost Clock

-

1500 MHz

Memory Clock

957 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

192bit

96.00GB/s

Bandwidth

91.87GB/s

Render Config

10

Compute Units

-

SM Count

6

640

Shading Units

288

40

TMUs

48

16

ROPs

24

-

16 KB (per CU)

L1 Cache

64 KB (per SM)

1024 KB

L2 Cache

384 KB

-

Theoretical Performance

17.14 GPixel/s

Pixel Rate

9.312 GPixel/s

42.84 GTexel/s

Texture Rate

37.25 GTexel/s

1371 GFLOPS

FP16 (half)

-

1371 GFLOPS

FP32 (float)

894.0 GFLOPS

85.68 GFLOPS

FP64 (double)

74.50 GFLOPS

Board Design

60W

TDP

102W

250 W

Suggested PSU

300 W

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

Outputs

2x DVI 1x mini-HDMI 1.3a

None

Power Connectors

-

Graphics Processor

Baffin

GPU Name

GF114

Baffin LE

GPU Variant

-

GCN 4.0

Architecture

Fermi 2.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

40 nm

3 billion

Transistors

1.95 billion

123 mm²

Die Size

332 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

1.1

1.2

Vulkan

N/A

-

CUDA

2.1

6.4

Shader Model

5.1

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