You aren't going to get standard Crossfire on that motherboard; it only supports CrossfireX. So, you'd need to pick up another Radeon 6670 and plug it straight into the first slot on the board. Honestly, you won't even need to upgrade your power supply...
Maybe he should try flashing the BIOS. There’s a beta version, 502, available for download that would actually allow him to run those newer Athlon X3 or X4 processors.
Good grief, where did they get that idea? Everywhere I look, it claims this card has a 384-bit bus, but I just double-checked the actual review and it’s clearly a 256-bit bus.
If that's the case, I'm leaning toward the EVGA gtx560ti. http://www.guru3d.com/article/msi-ge...hawk-review/11 In basically every game besides Anno 1404, it actually outperforms the Nvidia GTX 570. Plus, you have to consider that it runs quieter and stays much cooler, and it's even cheaper. I'm definitely taking this one.
That EVGA PCI-E card actually has a decent cooler on it, and the clock speeds aren't half bad either (900/4200). Plus, you've got that 384-bit bus... mmm. Honestly, that one is definitely the powerhouse compared to those other three.
You’ve got a point there. I just did some digging online, and honestly, another possibility is that since you aren't hearing absolutely anything when you boot the PC—nothing at all—your power supply might just be too weak to handle the load. Pull that card out and pop your old one back in to see if it actually boots up.
What kind of power supply are you running? Open up the case and take a look—I need to know the wattage, the manufacturer, and everything else. Also, tell us about your monitor. What's the resolution?
What kind of case are you running? If you’re using some cheap, bottom-of-the-barrel chassis, that’s almost certainly your culprit. As far as I can tell, neither that budget unit nor the EVGA isn't actually that loud. 🤷