Geforce GTX 560

In multiplayer game such as battlefield 3 the CPU will become the bottleneck.
Your games will run smooth since most games require dual core to run properly.
Buy the Graphics Card first, the CPU can be upgrade later on.

It depends, what power supply are you running?

my PSU is iMaster PRO 500W.

Get a new PSU.

Thank you. can you reccomend a gpu for resolution 1920 x 1080 at mid and high settings? And how will i know if a certain game like bf3 as you said that the CPU is the bottle neck.

What is your CPU?

why?

Because that PSU is a POS one! I doubt it can even output 500W.

it is indicated in my first post.

I believe the power supply is the culprit

When your are playing multiplayer in Battlefield 3 the CPU may cause a slowdown especially with 64 players.
I used to have a single core CPU, it bottlenecks especially when there are many players online and big explosions during a fight.
The jump to a dual core CPU made a difference to me.
A quad core will be even better as future games are able to utilize all the available cores and resources.
GTX 560 is a good card if you are playing games at mid-high and 1920x1080 resolution.
You may need to upgrade the CPU if you find games are not running as it should and you get low frame rate during gameplay.
A dual core is the minimum you want for gaming these days but if the game is unplayable you can always reduce graphics setting such as shadow for example.
These might be useful to you- http://www.geforce.com/hardware/desktop-gpus/geforce-gt...

A CPU that only runs a maximum of two threads will be 20% slower than a CPU that can run four threads on BF3 multi-player. That's why a four thread or quad core CPU is recommended for that game.

@dency45, what is the exact model number of the iMaster Pro 500W? I only see the one iMaster PSU in the 80 PLUS certification database, the iMaster P-500W. The iMaster P-500W was able to deliver a maximum combined +12V continuous current rating of 32.4 Amps. That is sufficient to power a system with a GeForce GTX 560 as long as it has two 6-pin PCI Express supplementary power connectors.

I dunno, the only thing i can see in the box iMaster Energy Efficient 80 Plus Bronze PRO 500W.

Thank you.

If your SMPS has two 6-pin PCI Express Supplementary Power Connectors then it will be able to power your system with a GeForce GTX 560.