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Why is my laptop's graphics performance so low?

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Anybody know how to disable Nvidia's Optimus function?  Googling didn't lead to a good answer.

 

I did a clean install of Win 8 (then 8.1) onto Sandisk Extreme II 480 GB SSD for Dell 17R SE (1980x1020, i7, 8GB), and now Windows Experience Index is quite high for all, Except for graphics performance.  Intel graphics HD4000 and Nvidia GT650M (with Optimus) can't be as bad as this ChrisPC Win experience says? (Win 8.1 dropped genuine Win Experience ap)

 

14119766159_28aecb117d.jpgIMG_20140529_145412 by drjlo1, on Flickr

 

14119781118_f1ebcc2804.jpgIMG_20140529_190543 by drjlo1, on Flickr

Edited by Jon L

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Good thing I am not a gamer.  Photoshop CS6 seems to run extremely fast still; maybe it's not even using the Nvidia card for CS6.  

 

Ran 3DMark benchmarks for kicks anyway.

 

14121198260_531ac4a536.jpg3Dmark by drjlo1, on Flickr

It is an aggregate of all video cards - desktop, mobile, and embedded... you are being compared to something like a Titan desktop card.  I wouldn't really pay attention to those numbers in any meaningful way  aside from determining where a bottleneck might be based on your application.

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