Changing graphics card on an all-in-one PC

Hey guys I was wondering if it's a good idea to change my graphics card, in my all in one pc Acer Aspire Z5771, the specs is exactly the same as this http://www.acer.com.au/ac/en/AU/content/model/PW.SHM02.008

Would you guys recommend which graphics card are suitable for my pc, one suitable for gaming.

It's pretty much impossible to change graphics cards on AIO PC's, you can't just plug in a normal PCI-E desktop GPU. Unfortunately that's one of the downsides of buying them.

You do have a choice of attaching a TV. If you have an HDMI connection you might be able to use that. Like many laptops, you can't change that video chip. It is not a removable card

I'm afraid that I as well have to sing the same song as both slh28 and Tmagic are signing! And that is with the type of computer you picked out, a video card change out is almost next to impossible! So I hate to say your basically stuck with what you've got. I guess possibly go with the option that Tmagic brought up, maybe run with HDMI and see what that does for you!

The Z5771 does have a pcie slot for an external graphics card - how you get he case open I have not investigated but I was planning on buying a decent card for it. The only proviso seems to be it neds to be a low profile card.

You will have to look the case over carefully to figure out how to open it. There are plenty of low-profile PCIe cards out there to choose from

Hmm; I didn't see the PCIe mentioned in the spec

as shown, everything is integrated

You can still have a PCIe socket along with integrated graphics

Tmagic... & jobeard...
Nothing I find on CNET or on Acer (well; see below) indicated that PCIe socket.
However... this does... http://www.manualowl.com/m/Acer Computers/Aspire-Z5771/Manual/275596?page=27
Good information...

Then turning to the user manual...

I would suspect that the op should pay attention to this note on page 4

Somehow, I suspect, pcie16 "slot/connector" not withstanding,
the addition of a graphics card will not be an option for the OP.
If someone has actually DONE this, I would be delighted to hear about it.

_______________
added information
_______________
Per this document...
http://support.acer.com/acerpanam/desktop/2011/acer/aspire/AspireZ5771/AspireZ5771sp2.shtml
This AIO has only two supported graphics options...
Discrete graphic cards supported:

• NVIDIA® GeForce® GT 530 2 GB
• NVIDIA® GeForce® GT 520 1 GB

As said above... would be interested in hearing experiences of those who actually have modified the system.

Sure enough & I would take the manufacture's list over all others too

I'd call Acer and see if they have any GeForce GT 530 2GB cards, I could only find one on the net and it was $150.00.

http://www.pricewatch.com/search?q=GeForce GT 530&totalcost_min=min&totalcost_max=max

What about this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121646
I wouldn't think that anything would matter except PCIe 2.0 and low profile, and how to get this into the case

If you take a careful look at the manual, you can see that the video card that's in place is all confined to a single slot. I doubt that card would actually fit because its heat sink extends into, what looks to be, a non-available second slot.

Ahh, okay thanks