What is a good single graphics card for Non SLI/Crossfire?

[Ima let you finish]

As the title says, what is a good single graphics card that the SLI/Crossfire doesn't need to be added even though it is compatible for those. I'm looking for a good gaming one where I will get the best FPS on games like Battlefield Bad Company 2 when recording and run emulated games like Wii games with this emulator named Dolphin for PC. I need a good performance + quality and around $250 or less. I have a 750 Watts on an Intel Pentium Dual Core E5200 CPU @2.50GHz (2 CPUs) and Windows 7 64 bit. The current graphics card I have now is MSi R5770 Hawk, but the new games and emulated games run so slow on it, and I'm looking for a better card than this. So yeah, I want to know more about this please. Thank you.

 

[tomate2]

you should do some research on your own...
http://www.tomshardware.com/reviews/best-gaming-graphics-card-geforce-gtx-590-radeon-hd-6990,2879-4.html

 

[Nerdbox87]

A 5770 is pretty on par with your CPU.

You'd have to overclock (or upgrade) to keep up with anything much better.

Consider a $30 Hyper 212+ Cooler to overclock that CPU and a 6870 for roughly $200

Also if you've got 2GB RAM consider jumping up to 4GB also.

 

[jfem]

What is the brand and model of your mobo? To avoid bottleneck, upgrade first your cpu to a core 2 quad or at least a core 2 duo with a high clock speed if you don't want to overclock. A core 2 duo e7600 is a decent upgrade provided your mobo supports it. Then upgrade your video card to an HD 6950 1GB for around $250.

 

[lakshitharxx]

Go for a core 2 quad if you are going to buy a HD6950...

 

[Ima let you finish]

Here are my specs on CPU-Z:

CPU-

Motherboard-

Graphics Card-

P.S.: I'm kinda scared to overclock my 5770 because last time when I did it to like 900Mhz+ on a (about 17") 1280x1024 highest resolution monitor, it froze my computer. But I've upgraded my monitor to a ASUS VH236 23" where the highest resolution can go up to 1920x1080 Widescreen. And if it won't freeze my computer this time with this new monitor I hooked up my computer to, then at what Mhz speed should I overclock my 5770 using the MSi Afterburner?

 

[Nerdbox87]

I wouldn't bother overclocking your graphics card - you'll typically only get about 5% more, we're talking about overclocking your CPU.

However, you're running a sh** Dell which would have a locked BIOS so that isn't an option.

You'll be looking at more than 250$ to upgrade that to max out BC2 @ 1920x1080, since you need GPU & CPU now