Please help me choosing graphic card to buy

[habs2habs]

hi everyone

please i need your help.

i have Acer Aspire M7720 motherboard,this is the specification of my motherboard:

http://support.acer.com/acerpanam/desktop/0000/Acer/AspireM7720/AspireM7720sp2.shtml

i would like to buy graphic card from amazon,but i am confused which one to buy,because some of the graphic card require 3.0 PCI-E,and i am not sure that my motherboard have 3.0 PCI-E slot.

it has 2.0 PCI-E slots.

the graphic card i would like to buy and which i am confused are:

-http://www.amazon.co.uk/Sapphire-11179-09-20G-6870-GDDR5-Graphics/dp/B004R7MTPQ/ref=sr_1_1?ie=UTF8&qid=1347787039&sr=8-1

-http://www.amazon.co.uk/Asus-DirectCu-Graphics-Overclocked-Operation/dp/B004GV4AY6/ref=sr_1_2?ie=UTF8&qid=1347787039&sr=8-2


-http://www.amazon.co.uk/Sapphire-11200-00-20G-HD7850-GDDR5-Graphics/dp/B007JRGRPO/ref=sr_1_1?s=computers&ie=UTF8&qid=1347787127&sr=1-1


-http://www.amazon.co.uk/Sapphire-11199-00-20G-HD7870-GDDR5-Graphics/dp/B007MUJL2E/ref=sr_1_1?s=computers&ie=UTF8&qid=1347787176&sr=1-1


-http://www.amazon.co.uk/Sapphire-11199-03-20G-HD7870-GDDR5-Graphics/dp/B007MSI5AK/ref=sr_1_2?s=computers&ie=UTF8&qid=1347787221&sr=1-2



i am so sorry,for this big list,but please i need your help.to choose which one to buy in relate to graphic screen,memory,Overclocking(i can overclock the graphic card safely).etc...

please i need the quietest fan for those graphic card

the games i am playing now are:

-crysis,
-crysis warhead,
-crysis2,
-i am going to buy crysis 3 ,next year
-call of duty(old and new games),i am going to buy the newest call of duty when it is available.
-unreal tournament 3,
-medal of honor(old and new games),
-pariah(old game),
-command and conquer renegade(old game)
-frontlines:fuel of war


my pc spec:
intel i7 920
6 GB memory
windows7 home premium
antec true power 750Watts

thank you so much for your help in advance

my kindest regards
habs2habs

 

[GreenDutchAlien]

Hi.
Pci-e 3.0 is compatible with your 2.0 mobo. If money is no issue i would go for the oc 7870 it's only 3 bucks more than the non oc.

 

[habs2habs]

Hi.
Pci-e 3.0 is compatible with your 2.0 mobo. If money is no issue i would go for the oc 7870 it's only 3 bucks more than the non oc.

Thank you so much for your quick reply i received from you,i appreciated so much.

i will buy this graphic card as you mentioned:

-http://www.amazon.co.uk/Sapphire-11199-03-20G-HD7870-GDDR5-Graphics/dp/B007MSI5AK/ref=sr_1_1?ie=UTF8&qid=1348394801&sr=8-1



-Please how safely can i overclock my graphic card,and honestly i haven't done OC before?

-Is there any clip on (you tube),showing me how to oc this graphic card safely)?

i hope to hear from you and from from other people telling me how to OC graphic card

thank you so much for your help in advance

My kindest regards
habs2habs