I want to change a diaplay card for my computer to play BattleField 3 but I don't KNOW how and which kind of display card should I purchase for it. My computer's model is Aspire M5910.http://www.acer.co.uk/ac/en/GB/content/model/PT.SDWE2.194
These are your computer's specs.
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You might want to check this out too: http://www.tomshardware.com/reviews/battlefield-3-graphics-performance,3063-2.html


This is clearly a very graphics-intensive game. According to http://www.battlefield.com/battlefield3/1/bf3-faq the recommended specs are:

RECOMMENDED SYSTEM REQUIREMENTS
OS: WINDOWS 7 64-BIT
PROCESSOR: QUAD-CORE CPU
MEMORY: 4 GB
HARD DRIVE: 20 GB
GRAPHICS CARD: DIRECTX 11 COMPATIBLE WITH 1024 MB RAM (NVIDIA GEFORCE GTX 560 OR ATI RADEON 6950)
SOUND CARD: DIRECTX COMPATIBLE
KEYBOARD AND MOUSE
DVD ROM DRIVE


I have noticed that these requirements are for 1080p and above-if you are looking to play at lower resolutions a HD 5850/6850 may suffice.
Lets look at the HD 6950 for now-http://www.amd.com/us/products/desktop/graphics/amd-radeon-hd-6000/hd-6950/Pages/amd-radeon-hd-6950-overview.aspx#3


You need at least a 500W PSU with 2 75W PCI-E power connectors. I would recommend upgrading your PSU-it has a maximum 500W output and we don't want something to go wrong, such as drops/spikes in line voltage causing damage to your system.
A DECENT Cooler Master 600W PSU:
http://www.newegg.com/Product/Product.aspx?Item=N82E16817171039
A Radeon HD 6950 that is customized by Gigabyte for BETTER cooling:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814150523


It does not provide the best bang for buck though, if you are not planning to game on EXTREME resolutions, you may want to consider some of the other cards


This is how to upgrade your graphics card by yourself: http://www.pcmag.com/article2/0,2817,2194488,00.aspThanx a lot!