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

VS

AMD Radeon 550X 640SP NVIDIA GeForce GTX 645 OEM

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

Main Differences

AMD Radeon 550X 640SP 's Advantages

Released 5 years late

Boost Clock1071MHz

More VRAM (4GB vs 1GB)

64 additional rendering cores

Lower TDP (50W vs 65W)

NVIDIA GeForce GTX 645 OEM 's Advantages

Larger VRAM bandwidth (64.00GB/s vs 48.00GB/s)

Score

Benchmark

FP32 (float)

Radeon 550X 640SP +44%

1.371 TFLOPS

GeForce GTX 645 OEM

0.949 TFLOPS

Radeon 550X 640SP

VS

GeForce GTX 645 OEM

Graphics Card

Apr 2018

Release Date

Apr 2013

Polaris

Generation

GeForce 600

Desktop

Type

Desktop

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

1019 MHz

Base Clock

-

1071 MHz

Boost Clock

-

1500 MHz

Memory Clock

1000 MHz

Memory

4GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

64bit

Memory Bus

128bit

48.00GB/s

Bandwidth

64.00GB/s

Render Config

-

SM Count

-

10

Compute Units

-

640

Shading Units

576

40

TMUs

48

16

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per SMX)

256 KB

L2 Cache

256 KB

Theoretical Performance

17.14 GPixel/s

Pixel Rate

9.888 GPixel/s

42.84 GTexel/s

Texture Rate

39.55 GTexel/s

1371 GFLOPS

FP16 (half)

-

1371 GFLOPS

FP32 (float)

949.2 GFLOPS

85.68 GFLOPS

FP64 (double)

39.55 GFLOPS

Graphics Processor

Lexa

GPU Name

GK106

Lexa PRO (215-0904018)

GPU Variant

GK106-200-A1

GCN 4.0

Architecture

Kepler

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

2.2 billion

Transistors

2.54 billion

103 mm²

Die Size

221 mm²

Board Design

50W

TDP

65W

250 W

Suggested PSU

250 W

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

Outputs

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

None

Power Connectors

None

Graphics Features

12 (12_0)

DirectX

12 (11_0)

4.6

OpenGL

4.6

2.1

OpenCL

3.0

1.2

Vulkan

1.1

-

CUDA

3.0

6.4

Shader Model

5.1

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