That PSU is fine.Are you looking at the clocks when your idle or under load?
AMD has an energy saving function that will downclock the card if the extra power isn't needed which might explain
After looking around a bit I've found that the DDR2 5570's memory speeds can range from 800mhz to 1000mhz.Your's is probably in a downclock state.Try doing something graphicly intensive and then look at the readings again.
Can you open CCC and see why the ATI Overdrive settings are at?
GPU companies like AMD and Nvidia grossly overstate the actual PSU needed to power a GPU because their are some companies that make bad power supplies.Actually I just looked at your PC and you have a 125 watt processor and 8G of RAM.You might need a new PSU even with a small card like the 5570.But before we do that just try to see what the clocks are at.
so it was not the psu at all. I asked an xfx technician. This is what he said.
"DDR memory is capable of doing two operations per clock cycle. This doubles the bandwidth of the memory. DDR memory is always advertised at its effective clock and not its actual clock to help compare it to other types of memory. 500MHz is 1000MHz effective. Your DDR system memory does the same thing. If you download CPU-Z and check the memory tab for your system memory you would see that its actual clock speed is half of what it is advertised as. "