[internal]

That's the thing, you ram WASN'T running at 400DDR it was running at 440DDR after you upped the HT by 20.

Go into your bios and clock down your ram with the divider so it actually runs at 366mhz or even 333mhz before the overclock.

After lower the ran speed and bringing the HT up, your processor will increase in speed and your ram will increase as well, but since it started out at 366mhz or 333mhz, after the overclock it will put it back to he stable 400mhz range.

 

[internal]

See if you can push your HTT further so you end up with a 2.5ghz CPU overclock and that would put your ram around 215mhz.

IF it doesn't, bring you HT multi down to 3x and if that doesn't work, loosen up the timings slightly on your ram. (Maybe 2.5-4-4-8, or 3-3-3-8)

That would give you an extra kick in the pants.

IF you want to take all of this to the next level download superpi and/or use a benchmark that comes with one of your games and note the differences before and after making OC changes.

IF you bored you can even document your settings now and put things back to stock run the benchmarks, document the numbers and then apply your OC again and run the benchmarks again to note the differences.

Using this method I was able to find the sweet spot of my setup cause just because any one number is higher doesn't always mean it's "faster".

 

[internal]

About the PSU, you should be OK with that as long as you don't go adding in a new videocard like a 7800GT+, x1800xt+ and some more HDD or CDroms.

The quality of the wattage plays a big part.

For example, my 380 TPII Antec PSU is probably just as powerful as a 400w-430w PSU from a less quality brand.