|"Well since the HD 5570 in not much of a performer"|
Who said it's not much of a performer? The HD 5570 with GDDR5 memory is comparable in performance to the 9600 GT, GT 240 (GDDR5), HD 3870. And by overclocking, it would be at least on par with the HD 5670, HD 4830 or 9800 GT.
"With that board it's impossible to overclock e1400 to 3ghz"
OK, I just looked at the BIOS chapter in the user manual. This BIOS has the stupid memory multiplier setting that's latched to the default FSB, but even so, if 2.66 is the lowest multiplier option, that means with the CPU clocked at 10 x 300MHz, the RAM would run at 800MHz (DDR). It wouldn't be the ideal 1:1 ratio, but it would certainly would increase overall performance.