Quote Originally Posted by msgclb View Post
I didn't take them as recommended. I just failed to use my full bios settings.

The following BIOS settings are stable but when I increase BCLK to 173 the system will not boot. I've tried a vcore up to 1.45v.

When I had this 920 in my P6T I got up to 4074 MHz with Turbo on (21x194) although not stable. I also had Prime95 stable for 30 min @ 20x195 (3900 MHz) but I stopped it because it was hot.

Bios settings used with 0114 and i7 920:

Code:
Genie BIOS Setting

CPU Feature
Set VR Current Limit Max: Disabled
Thermal Management Control: Disabled
EIST Function: Disabled
CxE Function: Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled

***** Logical Processor Setting *****
Intel HT Technology: Enabled
Active Processor Cores: All

DRAM Timing
Memory Control Setting: AUTO
Channel Interleave Setting: AUTO
Rank Interleave Setting: AUTO
Memory LowGap: 1536M

DRAM Command Rate: 1N
CAS Latency Time (tCL): 9
RAS# to CAS# Delay (tRCD): 9
RAS# Precharge (tRP): 9
Precharge Delay (tRAS): 24
REF to ACT Delay (tRFC): AUTO
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): AUTO
ACT to ACT Delay (tRRD): AUTO
Row Cycle Time (tRC): AUTO
Read CAS# Precharge (tRTP): AUTO
Four ACT WIN Time (tFAW): AUTO

Voltage Setting
O.C. Shut Down Free: Enable O.C.S.D.F
CPU VID Control: 1.375v
CPU VID Special Add Limit: Enabled
CPU VID Special Add: Auto
Vcore Droop Control: Enabled
DRAM Bus Voltage: 1.695v
DRAM PWM Switch Frequency: Nominal Frequency
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: AUTO
CPU VTT Voltage: 1.39v
VTT PWM Switch Frequency: Nominal Frequency
VTT PWM Phase Control: 2 Phase Operation

CPU PLL Voltage: 1.80v
IOH/ICH 1.1V Voltage: 1.11v
IOH Analog Voltage: 1.10v
ICH 1.5 Voltage: 1.5v
ICH 1.05V Voltage: 1.05v
DIMM 1/2 DQ/DQSTB Bus VREF: -00.0%
DIMM 3/4 DQ/DQSTB Bus VREF: -00.0%
DIMM 5/6 DQ/DQSTB Bus VREF: -00.0%
ADDR/CMD VREF Control: Disabled
x DIMM 1/2 ADDR/CMD Bus VREF: 110
x DIMM 3/4 ADDR/CMD Bus VREF: 110
x DIMM 5/6 ADDR/CMD Bus VREF: 110
CPU QPI Drive Strength: Normal
IOH QPI Drive Strength: Normal

Exit Setup Shut down: Mode 2
O.C. Fail Retry Counter: Enabled
O.C. Fail CMOS Reload: Disabled

PPM Function: Enabled
Turbo Mode Function: Disabled
x 1 core Max Turbo Ratio: 22x
x 2 core Max Turbo Ratio: 21x
x 3 core Max Turbo Ratio: 21x
x 4 core Max Turbo Ratio: 21x
CPU Non-Turbo Clock Ratio: 20x

* BCLK/UCLK/QPI Controller Settings *
QPI Control Settings: Enabled
QPI Link Fast Mode: Enabled
QPI Frequency: 4.8GT/s (BCLK * 18 * 2)
CPU Base Clock (BCLK): 172 Mhz
Boot Up CPU Base Clock: AUTO
PCIE Clock: 100 Mhz
DRAM Frequency: BCLK x 08 (1376MHz)
UnCore Frequency: BCLK x 16 (2752MHz -> 2x DRAM Frequency)

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
When it doesn't boot what postled code ?


play with PWM switch frequencies as well some memory like reduce 15% over nominal

and play with modules in different order for same dimm slots

also play with subtimings too

DRAM memory tips #1, #2 and #3 http://i4memory.com/102537-post3.html

Also have you tried bclk values other than 173 ? i.e. 174 or higher ?

I'm using 1/23 pre-beta bios and first time i came across this little bug i was testing 6x1GB mixed tri channel and 7-7-7-18 1t and slowly bumping bclk on 8x mem multi. Was fine from starting bclk of 150 up to 166. Then set 167 got postled 75 on bios exit/boot up and blank screen. Then tried bclk from 168 to 216 and had no probs with 6x1GB @859mhz 7-7-7-18 1T http://i4memory.com/f83/6x1gb-corsai...rclocks-14112/ heh