So I have a computer with:

Windows 7 (64 bit)
AMD Phenom(tm) II X6 1045T Processor, 2700 Mhz, 6 Core(s), 6 Logical Processor(s)
8 GB RAM
ATI Radeon HD 5570

And I have started noticing lately that my graphics card seems to be the weak link for my computer and I would like to fix that.

But the problem is, I don't really know anything about what graphics card to get, so can I get any advice please? (btw, this is meant to be a gaming rig)

Need a price range.

Upgrade to a better ATI Radeon probably 7700-7900 Anything passed that might cause troubles. But make sure you get an ATI card since you have an AMD processor. Just less complicated.

Just leak everything and the whole world will know. Gosh, people....

What games are you trying to play? with that card, you are able to run most games using a pretty high resolution.

Whats your budget to spend for the GPU? The HD 5770 would be a popular choice. Or the HD 6850

For budget, I don't know how much you would need to spend to get a good card, but I would like to not go above $300

I am also trying to run any current and future games

amd hd radion 7800 series thats what i have and it runs any game at max battlefield3 cryisis etc

Think about HD 7950 with 3GB GDDR5.
That monster should do any job and is around 290 bucks.

It can also depend on your native monitor resolution and if you have dual/triple monitors as well. If your playing your games at 1920x1080 or 1920x1200 and higher, then the higher end $250-300 would be the best choice, or a card with a lot of dedicated video ram (1GB+). If you have a low native resolution monitor, say 17" or 18" at 1680x1050 or something, then a decent $150 card would be fine.

A decent card to start with is the Nvidia GTX 560ti (http://www.newegg.com/Product/Product.aspx?Item=N82E16814130604). It's a proven card that can hold its own and often be snagged for sub $200 if you look around.

Or if you can spare the $300, the Nvidia GTX 660ti is the newer version that is a tad bit more acceptable for dual monitor and higher resolution gaming. (http://www.newegg.com/Product/Product.aspx?Item=N82E16814130809)

If your looking for the ATI side of things, the 7800 series is a very good value for the $200-300 range. I'd check the 7850/7870's or something like this (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127662)

thanks for the help; now just to save up the money -.-'

I'm sorry, I can't resist...

Just ditch that Microsoft POS operating system and load up OS/X or LINUX. Once you have a real OS that can properly manage devices and buses and are free of the horror of DirectX, you may find new hardware is not required.

On a more serious note, you have a pretty good setup already. The ATI card you have has excellent throughput, polygon, and pixel specs. If you have noticed a steady degradation, I would be more concerned that something else is going on, such as perhaps you are dealing with a fragmented hard disk (this can even slow down virtual memory swapping if you have gotten way low on space) or even a virus. Or... you could have a recent upgrade that is wreaking havoc (common with Windows). Did this happen right after you applied a patch? Can you remember when it was last good and what changed? You may wish to consider backing up your data and then "re-baselining" the OS. Most manufacturers provide or will provide a free set of disks for reloading the computer to its original state. If you do that, install your game and all is well, you have some idea then what happened. Make sure then to note performance carefully before and after installing patches.

Tell us more about what you know about this and what you may have observed...

very cheap option, add another card in crossfireX or simply buy a new better one. I suggest you read comments on internet before doing your choice and it also depends on what you need it for. 3d graphics, gaming, multi-monitors?

edit: don't change your OS, even tho I'm a linux/gnu fan, windows is "more compatible" with most of the programs you probably use and I'm sure it's not in your interest to learn how to use a new OS.