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Differences What are the advantages of each

Front view of GeForce GTX 650 Ti

Reasons to consider the
Axigon GeForce GTX 650 Ti

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Significantly higher clock speed 1,006 MHz vs 783 MHz Around 30% higher clock speed
Higher effective memory clock speed 5,400 MHz vs 3,608 MHz Around 50% higher effective memory clock speed
Better floating-point performance 1,545 GFLOPS vs 601.3 GFLOPS More than 2.5x better floating-point performance
Higher texture rate 64.4 GTexel/s vs 25.1 GTexel/s More than 2.5x higher texture rate
Higher pixel rate 16.1 GPixel/s vs 6.26 GPixel/s More than 2.5x higher pixel rate
Significantly higher memory clock speed 1,350 MHz vs 902 MHz Around 50% higher memory clock speed
Slightly higher memory bandwidth 86.4 GB/s vs 57.7 GB/s Around 50% higher memory bandwidth
More shading units 768 vs 192 576 more shading units
More texture mapping units 64 vs 32 Twice as many texture mapping units
Front view of GeForce GTS 450

Reasons to consider the
Nvidia GeForce GTS 450

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GPUBoss is not aware of any important advantages of the Nvidia GeForce GTS 450 vs the Axigon GeForce GTX 650 Ti.

Features Key features of the GeForce GTX 650 Ti  vs GTS 450 

memory bandwidth Rate at which data can be read from or stored in onboard memory

GeForce GTX 650 Ti
86.4 GB/s
GeForce GTS 450
57.7 GB/s
The memory overclocking potential is particularly surprising considering NVIDIA's GDDR5 memory clock speeds and overclocking potential have been on the lower side.
GeForce GTS 450 | by techPowerUp! (Sep, 2010)

pixel rate Number of pixels a graphics card can render to the screen every second

GeForce GTX 650 Ti
16.1 GPixel/s
GeForce GTS 450
6.26 GPixel/s
You may combine up to two GTS 450 cards in SLI for added performance or improved image quality settings.
GeForce GTS 450 | by techPowerUp! (Sep, 2010)

texture rate Speed at which a graphics card can perform texture mapping

GeForce GTX 650 Ti
64.4 GTexel/s
GeForce GTS 450
25.1 GTexel/s
As the "GTS" naming suggests, the card is more of a mid-range part than a high-performance device.
GeForce GTS 450 | by techPowerUp! (Sep, 2010)

floating point performance How fast the gpu can crunch numbers

GeForce GTX 650 Ti
1,545 GFLOPS
GeForce GTS 450
601.3 GFLOPS
Based on a rehashed AnvilNext game engine that uses DirectX 11 and Havok CPU physics, Assassin's Creed III is the most graphics-intensive member of the franchise, depicting North American landscapes in great detail.
GeForce GTX 650 Ti | by techPowerUp! (Apr, 2013)

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Reviews Word on the street

GeForce GTX 650 Ti  vs GTS 450 

9.1
9.0
In this review, we're taking a close look at the ASUS GeForce GTX 650 Ti DirectCU II TOP: a premium factory-overclocked model that combines ASUS's workhorse performance-segment cooler, the 2-slot DirectCU II, with a custom-design PCB.
GeForce GTX 650 Ti

Specifications Full list of technical specs

gpu

GeForce GTX 650 Ti  vs
GTS 450 
GPU brand Nvidia Nvidia
GPU name GK106 GF116
Market Desktop Desktop
Clock speed 1,006 MHz 783 MHz
Is dual GPU No No
Reference card Nvidia GeForce GTX 650 Ti 928 MHz 1 GB None

raw performance

Shading units 768 192
Texture mapping units 64 32
Render output processors 16 16
Pixel rate 16.1 GPixel/s 6.26 GPixel/s
Texture rate 64.4 GTexel/s 25.1 GTexel/s
Floating-point performance 1,545 GFLOPS 601.3 GFLOPS

memory

GeForce GTX 650 Ti  vs
GTS 450 
Memory clock speed 1,350 MHz 902 MHz
Effective memory clock speed 5,400 MHz 3,608 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 1,024 MB
Memory type GDDR5 GDDR5
Memory bandwidth 86.4 GB/s 57.7 GB/s

noise and power

TDP 110W 106W

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