Help With New Desktop!!!

I just bought a new desktop and its really fast so I decided to install Call of duty 4 on it. After I installed it and started playing it started lagging. And for the video card it says 256mb of video ram and up to 3067MB total available as allocated by Windows 7. What does that mean and do I have to allocate it or does windows 7 automatically allocate it because if the maximum is up to 3067MB then it shouldn't be lagging. How do I get it to allocate more ram to the graphics card?

It's an ATI Radeon 4200 and heres the link for the desktop http://www.bestbuy.com/site/HP+-+Pavilion+Desktop+with+AMD+Phenom%26%23153%3B+II+X4+Quad-Core+Processor/9549438.p?id=1218122580358&skuId=9549438

It's an ATI Radeon 4200 and heres the link for the desktop http://www.bestbuy.com/site/HP+-+Pavilion+Desktop+with+AMD+Phenom%26%23153%3B+II+X4+Quad-Core+Processor/9549438.p?id=1218122580358&skuId=9549438

halogamer2145

Oh, but should it still have a slot for a video card? Which video card is good but for a cheap price? And how hard is it to put in a new video card because I have never opened up a desktop before?

Oh, but should it still have a slot for a video card? Which video card is good but for a cheap price? And how hard is it to put in a new video card because I have never opened up a desktop before?

halogamer2145

680$

680$

halogamer2145

Okay I just bought it so I can still return it. My budget is 680$. What is the best desktop that I can buy? PM me.

Okay I just bought it so I can still return it. My budget is 680$. What is the best desktop that I can buy? PM me.

halogamer2145

No, I already have one.

No, I already have one.

halogamer2145

hmm would you be willing to take a stab at building your own?

[QUOTE="halogamer2145"]

No, I already have one.

UltimateGamer95

How hard would it be for me to build my own? I never opened up a desktop but I know where everything goes. Do I have to solder anything or is it just ordering parts and screwing them in? And how hard would it be for me to install water cooling?

Why would you want water cooling? Are you planning some major overclocking?

Maybe not major overclocking. I just don't wan't any overheating problems.

Can I still put a graphics card in the motherboard?

it has an extra PCI Express x16 slot. Is that what graphics cards need? What is a good cheap graphics card that will play Modern Warfare 2 smoothly?

How hard would it be for me to build my own? I never opened up a desktop but I know where everything goes. Do I have to solder anything or is it just ordering parts and screwing them in? And how hard would it be for me to install water cooling?

halogamer2145