laptop meet requirement but keep lagging in call of duty black ops3

[Peter_3]

I just got a new laptop to try some new games.
Its an HP Hewlett Packard here my spec i also got 2 graphic cards

When i play black ops 3 i get like 20 fps i dont know why and hw to fix that.
please help me and sorry because i made 2 post and i dont know how to delete one.

 

[faalin]

minimum for a graphics card is a GTX 470, your 840M is about half the speed of the 470. Your graphics card is holding you back, since its a HP laptop im not sure if you can change it out.

 

[Peter_3]

intel hd graphics 5500 + nvidia 840 4gb
i7-5500ucpu@2.40ghz
ram 8
windowns 8.1 64bits

 

[faalin]

Minimum specs for the game are
i3 530
GTX 470
6gb ram
55gb HDD space

You have

i7 5500 your fine
840 mobile holding you back
8gb ram your fine
? HDD space but im sure you have enough.

a gtx 470 is 3 times better then the 840m and the 840m is twice as good as the 5500 on chip graphics.

Your graphics card is not good enough for the game. check this out http/gpu.userbenchmark.com/Compare/Nvidia-GeForce-GTX-470-vs-Nvidia-GeForce-840M/m7820vsm8643

 

[Peter_3]

yes but i got 840 m 4Gb and not 2Gb does that make a difference? because on that website they are comparing gtx with 840m 2Gb.

 

[faalin]

the 840m will hardly use more then 2gb, having 4gb on the card is almost a waste and will not help with any performance over a normal 2gb version card. So no 4gb vs 2gb does not make a difference on a 840m.