@bluestang , try this setting should able boot up at 533 FSB but not guarantee to stable

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MB Intelligent Tweaker(M.I.T.) 
Robust Graphics Booster .................: [Turbo]
CPU Clock Ratio .........................:  8
Fine CPU Clock Ratio.....................: [+0.0]
CPU Frequency ...........................: 4264MHz 
Clock Chip Control  
Standard Clock Control 
CPU Host Clock Control..................: [Enabled] [Disabled] 
CPU Host Frequency (Mhz) ............: 533Mhz 
PCI Express Frequency (Mhz) .........: [101] 
C.I.A. 2.............................: [Disabled] 
Advanced Clock Control [Press Enter] 
CPU Clock Drive...........................: 800mv 
PCI Express Clock Drive...................: 900mv 
CPU Clock Skew (ps).......................: 0ps
MCH Clock Skew (ps).......................: 0ps
Performance Enhance....................: [Turbo] 
(G)MCH Frequency Latch.................: [Auto] 
System Memory Multiplier ..............: 2.00D
Memory Frequency (Mhz) ................: 1066Mhz 
DRAM Timing Selectable ................: [Manual]
Standard Timing Control
CAS Latency Time...............................: [5]
tRCD ..........................................: [5]
tRP'...........................................: [5]
tRAS...........................................: [15]  <--- all of the rest is auto up to yr RAM stability
Motherboard Voltage Control 
Load-Line Calibration....................: [Enabled]
CPU Vcore….……….........1.22500V*.........: 1.35000 <---up to yr CPU
CPU Termination…...... 1.200V*...........: 1.26 
CPU PLL………………….........1.500V*...........: 1.50
CPU Reference..........0.760V............: [Normal]
MCH/ICH 
MCH Core……………..........1.100V............: 1.30
MCH Reference..…...….….0.760V............: [Make Value to 0.68-0.70 in ET6]**this is very important to get boot up
MCH/DRAM Reference.....0.900V............: [Normal]
ICH I/O…………....……......1.50V............: [auto]
ICH Core...............1.100V............: [auto]
DRAM 
DRAM Voltage ……........1.800V............: 2.0-2.1 up to yr RAM requirement
DRAM Termination ...…..0.900V............: [Normal]
Channel A Address Vref 0.900V............: [Normal]
Channel B Address Vref 0.900V............: [Normal]