bios 623-3.. ( for my TCCD 512x2 )
prime for 1H30min @ 2.5 3 2 6 250Mhz
now running @ 2.5 3 2 5 @ 240Mhz

what is MAIN the possibility when u can pass memtest for > 8hrs but u cant logon to windows?

Nice....what mobo u using?

I only able to get 249Mhz-250Mhz wit 3-3-3-8
Using MSI Neo2 non-platinum edition

as I said, this ram is picky on Intel mobos~~
Most of the testing done is on AMD so nothing much we can do~~

My experience a bit weird too....memtest86 errors at 227Mhz 2.7V 2.5-3-3-6 but can boot to Windows. Tested with 2.8V same timing, memtest86 no errors at all.....now went down to 2.65V/2.7V with 2.5-3-3-5 no errors whatsoever....

alwez try from lowest to highest. i'm runnin my pair of ce-5 @ 240 @ 2.5-3-2-5 w 2.5 + .3v. 

as for d bsod thingy, try to play w d drive strengths too. 

ram on orange slots ?

have to test a lot of times, the possibility and all...

i think you can try
-set the DS and DDS (normally set 8 and 3)
-set tref (normally set  4708 or 3120)
-overclock at 2.4~2.5v
-change slot
-run at 2t

my setting @ 240Mhz
bios 623-3
DRAM Configuration Settings:

DRAM Frequency Set............................  -  200
Command Per Clock (CPC).......................  -  Enable
CAS Latency Control (Tcl).....................  -  2.5 Bus Clocks
RAS# to CAS# delay (Trcd).....................  -  03 Bus Clocks
Min RAS# active time (Tras)...................  -  05 Bus Clocks
Row precharge time (Trp)......................  -  02 Bus Clocks
Row Cycle time (Trc)..........................  -  7 Bus Clocks
Row refresh cyc time (Trfc)...................  -  12 Bus Clocks
Row to Row delay (Trrd).......................  -  02 Bus Clocks
Write recovery time (Twr).....................  -  02 Bus Clocks
Write to Read delay (Twtr)....................  -  02 Bus Clocks
Read to Write delay (Trwt)....................  -  02 Bus Clocks
Refresh Period (Tref).........................  -  auto Cycles
Write CAS Latency (Twcl)......................  -  Auto
DRAM Bank Interleave..........................  -  Enabled

DQS Skew Control..............................  -  Auto
DQS Skew Value................................  -  0
DRAM Drive Strength...........................  -  Level 8
DRAM Data Drive Strength......................  -  Level 3
Max Async Latency..........................  -    08.0 Nano Seconds
DRAM Response Time............................  -  Normal
Read Preamble Time............................  -  05.0 Nano Seconds
IdleCycle Limit...............................  -  16 Cycles
Dynamic Counter...............................  -  Disable
R/W Queue Bypass..............................  -  16 x
Bypass Max....................................  -  07 x
32 Byte Granularity...........................  -  Disable(4 Bursts)