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Differences What are the advantages of each

Front view of GeForce GT 630

Reasons to consider the
EVGA GeForce GT 630

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Significantly higher clock speed 810 MHz vs 450 MHz 80% higher clock speed
Significantly higher effective memory clock speed 3,200 MHz vs 1,100 MHz Around 3x higher effective memory clock speed
Slightly more memory 1,024 MB vs 256 MB 4x more memory
Slightly higher memory bandwidth 51.2 GB/s vs 35.2 GB/s More than 45% higher memory bandwidth
Higher memory clock speed 800 MHz vs 550 MHz More than 45% higher memory clock speed
Front view of GeForce 6800 Ultra Extreme

Reasons to consider the
Nvidia GeForce 6800 Ultra Extreme

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More render output processors 16 vs 4 12 more render output processors
Wider memory bus 256 bit vs 128 bit 2x wider memory bus

Features Key features of the GeForce GT 630  vs 6800 Ultra Extreme 

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

GeForce GT 630
3.24 GPixel/s

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

GeForce GT 630
12.96 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 GT 630  vs
6800 Ultra Extreme 
GPU brand Nvidia Nvidia
GPU name GF108 NV40
Market Desktop Desktop
Clock speed 810 MHz 450 MHz
Is dual GPU No No
Reference card Nvidia GeForce GT 630 810 MHz 1 GB None

raw performance

Texture mapping units 16 16
Render output processors 4 16
Pixel rate 3.24 GPixel/s 7.2 GPixel/s
Texture rate 12.96 GTexel/s 7.2 GTexel/s

memory

GeForce GT 630  vs
6800 Ultra Extreme 
Memory clock speed 800 MHz 550 MHz
Effective memory clock speed 3,200 MHz 1,100 MHz
Memory bus 128 bit 256 bit
Memory 1,024 MB 256 MB
Memory type GDDR5 GDDR3
Memory bandwidth 51.2 GB/s 35.2 GB/s

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