Graphic card for my office pc

[myowaiwin]

my office pc

intel E7400 c2d 2.8ghz stock speed, stock cooler
asus G31 mb
2* 1gb ddr2 800 RAM
500 gb HDD
1366*768 monitor

i'm now using X3100 onboard graphic and i want to upgrade to dedicated graphic and i'm thinking of

-low power, low heat
-fanless (if possible)
-i'll use for internet surfing, movie watching, office works, and some games occasionally (CNC general, wow that all)

and i found the following cards, so plz give me comments and let me know which one is more powerful than the other.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814102819

http://www.newegg.com/Product/Product.aspx?Item=N82E16814150335

http://www.newegg.com/Product/Product.aspx?Item=N82E16814102877

and plz suggest me more, if u have any other options (somewhat budget minded)

 

[borisof007]

The 5450 would be your best choice, but heads up, it's a PCI-Express 2.1 video card, meaning that if you have a motherboard with only a PCI-Express 1.0 slot, it's not going to work.

IF that's the case, then the 2nd best option would definitely be the 4550. If you do have a motherboard that has a PCI-Express 2.0 slot, then get the 5450.

I'm not sure how well those games will play, but they'll definitely play smoother than what you have now.

 

[myowaiwin]

yes, i can play these games with low or medium setting but i got some pause in these games occasionally and sometimes duing window 7 office use.
my main concern is to ease that pause and my pc to work little more faster.

so adding a dedicated graphic will make my pc a little faster or not, i mean normal daily use, not the process dependent jobs like video encoding.

thanks