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

VS

NVIDIA GeForce GT 645 OEM

AMD Radeon 550X 640SP

We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 645 OEM and 4GB VRAM Radeon 550X 640SP to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645 OEM 's Advantages

Larger VRAM bandwidth (91.87GB/s vs 48.00GB/s)

AMD Radeon 550X 640SP 's Advantages

Released 6 years late

Boost Clock1071MHz

More VRAM (4GB vs 1024GB)

352 additional rendering cores

Lower TDP (50W vs 102W)

Score

Benchmark

FP32 (float)

GeForce GT 645 OEM

0.894 TFLOPS

Radeon 550X 640SP +53%

1.371 TFLOPS

GeForce GT 645 OEM

VS

Radeon 550X 640SP

Graphics Card

Apr 2012

Release Date

Apr 2018

GeForce 600

Generation

Polaris

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

-

Base Clock

1019 MHz

-

Boost Clock

1071 MHz

957 MHz

Memory Clock

1500 MHz

Memory

1024MB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

192bit

Memory Bus

64bit

91.87GB/s

Bandwidth

48.00GB/s

Render Config

-

Compute Units

10

6

SM Count

-

288

Shading Units

640

48

TMUs

40

24

ROPs

16

-

64 KB (per SM)

L1 Cache

16 KB (per CU)

384 KB

L2 Cache

256 KB

-

Theoretical Performance

9.312 GPixel/s

Pixel Rate

17.14 GPixel/s

37.25 GTexel/s

Texture Rate

42.84 GTexel/s

-

FP16 (half)

1371 GFLOPS

894.0 GFLOPS

FP32 (float)

1371 GFLOPS

74.50 GFLOPS

FP64 (double)

85.68 GFLOPS

Board Design

102W

TDP

50W

300 W

Suggested PSU

250 W

2x DVI 1x mini-HDMI 1.3a

Outputs

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

-

Power Connectors

None

Graphics Processor

GF114

GPU Name

Lexa

-

GPU Variant

Lexa PRO (215-0904018)

Fermi 2.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

40 nm

Process Size

14 nm

1.95 billion

Transistors

2.2 billion

332 mm²

Die Size

103 mm²

Graphics Features

12 (11_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.1

OpenCL

2.1

N/A

Vulkan

1.2

2.1

CUDA

-

5.1

Shader Model

6.4

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