Guys this was achieved via phase change
Here's the break down i had tested on this chip
3000+ @ 2.45ghz (Stock HSF)
3000+ @ 2.6ghz (Watercool)
3000+ @ 2.8ghz (Phase Change)
All tested prime stable
Whoever the manufacture isnt impotant
What's most impotant is the chipset under it
A value DDR333 Hynix D43 can even perform on par with a top manufacture DDR500 coz they also using Hynix D43 chip but shipped them out as DDR500 etc
Here's a screen shot for u to has better understanding...