I hate to admit it but budget CrossFire setups are beginning to have a place in the market thanks to aggressive pricing and low-end cards performing quite strong these days. The MSI HD 5670 we looked at today is going to set you back $114.99, while a HD 5770 with the stock cooler is going to be $169.99 after a $10.00 mail-in rebate.
Now, before you say that two HD 5670s are more expensive than a single HD 5770, let me stop you and say; I know. HD 5670s can be had for under $100, though; closer to the $95 mark. And again, while that setup is slightly more expensive than a single HD 5770, it's also slightly faster across the board.
Setting up CrossFire is of course going to require a motherboard that supports the technology, but with many people sporting an i7 or i5 CPU, this shouldn't be a problem. The only other issue that tends to pop up is power requirements, but at just below 350 Watt at load, just about any good quality power supply will handle the setup.
On to the specifics that are part of the HD 5670 from MSI, we discover it's another good variation from the stock model thanks to its aftermarket cooling option. Performance is as you would expect and this model of course supports EyeFinity which is an important feature.
Overclocking can be done with the Afterburner software, but as we discovered, don't expect miracles when it comes to the performance increase you get. While some extra FPS can be had, if you're really looking for something that can game better at higher detail in 1680 x 1050 or higher resolutions, look at the CF setup or a HD 5770 and above.