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Differences What are the advantages of each

Front view of GeForce GTS 450

Reasons to consider the
Nvidia GeForce GTS 450

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Significantly higher clock speed 783 MHz vs 450 MHz Around 75% higher clock speed
Slightly more memory 1,024 MB vs 256 MB 4x more memory
Higher memory clock speed 700 MHz vs 550 MHz More than 25% higher memory clock speed
Front view of GeForce 6800 Ultra Extreme AGP

Reasons to consider the
Nvidia GeForce 6800 Ultra Extreme AGP

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Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Features Key features of the GeForce GTS 450  vs 6800 Ultra Extreme AGP 

effective memory clock speed Frequency at which memory can be read from and written to

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

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

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

GeForce GTS 450
18.79 GTexel/s

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

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

Specifications Full list of technical specs

gpu

GeForce GTS 450  vs
6800 Ultra Extreme AGP 
GPU brand Nvidia Nvidia
GPU name GF116 NV40
Market Desktop Desktop
Clock speed 783 MHz 450 MHz
Is dual GPU No No
Reference card None None

raw performance

Texture mapping units 24 16
Render output processors 16 16
Pixel rate 4.7 GPixel/s 7.2 GPixel/s
Texture rate 18.79 GTexel/s 7.2 GTexel/s

memory

GeForce GTS 450  vs
6800 Ultra Extreme AGP 
Memory clock speed 700 MHz 550 MHz
Effective memory clock speed 1,400 MHz 1,100 MHz
Memory bus 128 bit 256 bit
Memory 1,024 MB 256 MB
Memory type DDR3 GDDR3
Memory bandwidth 22.4 GB/s 35.2 GB/s

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