Very nice
Give these timing ranges a try, starting with highest, lowering from there
FSB Strap to North Bridge: Auto
DRAM Frequency: Use Rated Speed
DRAM Command Rate: 2T
DRAM Timing Control: Manual
CAS# Latency: 5
RAS# to CAS# Delay: 5
RAS# Precharge: 5
RAS# Activate to Precharge: 12 (since 12 seems to be working fine at 1066Mhz)
*Use Highest Numbers First for Below*
Write Recovery Time: 5-6
REF Cycle Time: 55-60
Write to Read Delay: 3-5 (If no post setting this value, try 9-11)
RAS# To RAS# Delay: 3-5
Read to Pre Time : 5-6
DRAM Static Read Control: Disabled (Enabled if possible, unlikely at 533 fsb)
Transation Booster: Disabled
Relax Level: 0-3 , lower for more performance, has a huge impact on performance / stability running high fsb
DDR2 Voltage : 2.0-2.1v