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Differences What are the advantages of each

Front view of GeForce 920M

Reasons to consider the
Nvidia GeForce 920M

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Much higher clock speed 954 MHz vs 450 MHz More than 2x higher clock speed
More memory 2,048 MB vs 256 MB 8x more memory
Higher effective memory clock speed 1,800 MHz vs 1,100 MHz Around 65% higher effective memory clock speed
Slightly higher texture rate 30.53 GTexel/s vs 7.2 GTexel/s Around 4.2x higher texture rate
Higher memory clock speed 900 MHz vs 550 MHz Around 65% higher memory clock speed
Front view of GeForce 6800 Ultra Extreme

Reasons to consider the
Nvidia GeForce 6800 Ultra Extreme

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Wider memory bus 256 bit vs 64 bit 4x wider memory bus

Features Key features of the GeForce 920M  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 920M
7.63 GPixel/s

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

GeForce 920M
30.53 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 920M  vs
6800 Ultra Extreme 
GPU brand Nvidia Nvidia
GPU name GK208 NV40
Market Laptop Desktop
Clock speed 954 MHz 450 MHz
Is dual GPU No No
Reference card Nvidia GeForce 920M 775 MHz 1 GB None

raw performance

Texture mapping units 32 16
Render output processors 16 16
Pixel rate 7.63 GPixel/s 7.2 GPixel/s
Texture rate 30.53 GTexel/s 7.2 GTexel/s

memory

GeForce 920M  vs
6800 Ultra Extreme 
Memory clock speed 900 MHz 550 MHz
Effective memory clock speed 1,800 MHz 1,100 MHz
Memory bus 64 bit 256 bit
Memory 2,048 MB 256 MB
Memory type DDR3 GDDR3
Memory bandwidth 14.4 GB/s 35.2 GB/s

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