GPUBoss Review Our evaluation of 650 vs 645

Gaming

Real world tests using the latest 3D games

crysis: warhead (2013), Crysis: Warhead (2012), Batman: Arkham City and 6 more

Benchmarks

Synthetic tests to measure overall performance

Passmark

Compute Performance

General computing tests executed on the GPU

Passmark Direct Compute and CLBenchmark Raytrace

Noise and Power

How loud and hot does the card run idle and under load

TDP

GPUBoss Score

Gaming, Benchmarks, Compute Performance and Noise and Power

Winner
Nvidia GeForce GTX 645 

GPUBoss recommends the Nvidia GeForce GTX 645  based on its .

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VS

Differences What are the advantages of each

Front view of GeForce GTX 650

Reasons to consider the
Colorful GeForce GTX 650

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Significantly higher clock speed 1,058 MHz vs 823 MHz Around 30% higher clock speed
Higher effective memory clock speed 5,000 MHz vs 4,000 MHz 25% higher effective memory clock speed
Higher memory clock speed 1,250 MHz vs 1,000 MHz 25% higher memory clock speed
Front view of GeForce GTX 645

Reasons to consider the
Nvidia GeForce GTX 645

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Slightly more texture mapping units 48 vs 32 16 more texture mapping units
Slightly more shading units 576 vs 384 192 more shading units
Slightly better passmark direct compute score 941 vs 817 More than 15% better passmark direct compute score
More SMX units 3 vs 2 1 more SMX units

Benchmarks Real world tests of GeForce GTX 650 vs 645

Passmark Industry standard benchmark for overall graphics card performance

3DMark 11, as the name might suggest, makes use of the Microsoft DirectX 11 API and puts every feature of it to use, creating astonishingly realistic visuals.
GeForce GTX 650 | by techPowerUp! (Mar, 2013)

Passmark Direct Compute Measures performance of general-purpose computing using Microsoft DirectCompute

CLBenchmark Raytrace Measures compute performance using OpenCL to do raytracing

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