Are these graphics cards compatible with my computer?

I have a HP p6540 (specs located at this link

http://www.shopping.hp.com/webapp/shopping/product_detail.do?storeName=storefronts%26amp;landing=outlet%26amp;category=desktop%26amp;lanAttr=column2%26amp;product_code=EPP_00_WW641AA%23ABA%26amp;catLevel=2) and am deciding between these 4 graphics cards (Specs at this link:

http://www.newegg.com/Product/Productcompare.aspx?Submit=ENE%26amp;N=100007709%204018%20600030349%26amp;IsNodeId=1%26amp;bop=And%26amp;CompareItemList=48|14-102-909^14-102-909-TS,14-131-358^14-131-358-TS,14-161-349^14-161-349-TS,14-121-367^14-121-367-TS)

But i need conformation on the compatibility, which I am fairly sure of, just looking for conformation. Easy 10 points for good answerAre these graphics cards compatible with my computer?
What makes you fairly sure that its compatible? From the images of the motherboard, it seems you motherboard doesn't have any PCI 2.0 Slots. And by the information, depending on if it has integrated ATI pr Nvidia Graphics, it doesn't support Hybrid SLI or Crossfire(Hybrid is when you have integrated paired up with a dedicated card.)



If you wanted to use any of those Video Cards you'd have to change, your motherboard, possibly your ram( it doesn't tell me what type it is ), and power supply. The price for all of that will be well over $300. And those video cards that you chose, some of them you're paying too much for.



Graphics Cards

Nvidia



GTS 450

http://www.newegg.com/Product/Product.as鈥?/a>



GTX 460 768mb

http://www.newegg.com/Product/Productcom鈥?/a>



GTX 460 1GB

http://www.newegg.com/Product/Product.as鈥?/a>



GTX 470

http://www.newegg.com/Product/Product.as鈥?/a>





ATI



5770 - The GIGABYTE brand 5770 owns.

http://www.newegg.com/Product/Productcom鈥?/a>



5830

http://www.newegg.com/Product/Productcom鈥?/a>



5850 - These are the more affordable ones.

http://www.newegg.com/Product/Productcom鈥?/a>



6850 %26amp; 6870

http://www.newegg.com/Product/Productcom鈥?/a>



Do you need anymore help looking for the components you will need to replace? Send me a message and I'll help you out.Are these graphics cards compatible with my computer?
No, I would suggest to buy XFX ATI Radeon HD 5770 1 GB DDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card

The XFX HD5770 is ready to elevate your gaming and multimedia experience to a whole new level. Armed with 1GB of DDR5 graphics memory and the latest GPU technology, the HD5770 is what you need.

http://www.amazon.com/XFX-Radeon-Display鈥?/a>

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