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For example, I know GT640 is better than GT640M.

1.Is GT630 better then GT640M?

2.Is GT620 better then GT640M?

3.Is GT610 better then GT640M?

How to check for their performance if I don't have any card before I want to buy?

Thank you~

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closed as off topic by Web-E, Anwar Shah, jokerdino, Uri Herrera, Amith KK Aug 9 '12 at 8:45

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Its an off topic. Its not related to ubuntu. Please have a look in FAQ –  Web-E Aug 9 '12 at 7:48
    
check out the phoronix.com/scan.php?page=home for comparisons and benchmarks , also having their own testsuite to do it manually. –  atenz Aug 9 '12 at 8:12

1 Answer 1

up vote 0 down vote accepted

If you don't have the card,

Research through internet. Read reviews and compare the posted benchmarks.

A list is over here - http://www.notebookcheck.net/Comparison-of-Laptop-Graphics-Cards.130.0.html

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