Been playing with DFI's latest 4/28 pre-public beta bios and it seems to have improved memory clocking stability for Elpida IC modules as well as improved my max H20 cooled bclk validation from 233 on 3/28 pre-public beta bios to 235bclk on 4/28 bios. 4/28 is pre-public beta so flash at your own risk from here.
4/28 bios seems to be more tolerant of very tight subtimings .. so close to sub 9min 32M pi at <3900Mhz!
sub 4000Mhz 32M
Max BCLK
Super Pi 1M to 32M
- 1M = 9.328s
- 2M = 21.000s
- 4M = 46.422s
- 8M = 1min 42.750s
- 16M = 3min 45.782s
- 32M = 8min 11.859s
System:
- i7 920 3836A756
- EK Supreme LT 1366 / FESER 480 / MCP655
- DFI UT X58-T3EH8 04/28 beta
- 512MB Inno3D 8800GT OC Edition
- 6GB Corsair Dominator GT DDR3-2000Mhz 7-8-7-20
- 750GB Samsung SATAII
- Silverstone OP1200 PSU
- Dual boot - WinXP Pro SP3 / Vista Ultimate 64Bit SP2
Bios settings used.
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 Channel Interleave Setting: AUTO Rank Interleave Setting: AUTO Memory LowGap: 1792M DRAM Command Rate: AUTO CAS Latency Time (tCL): 6 RAS# to CAS# Delay (tRCD): 7 RAS# Precharge (tRP): 6 Precharge Delay (tRAS): 20 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): 31 Read CAS# Precharge (tRTP): AUTO Four ACT WIN Time (tFAW): 31 Ch1 Round trip latency: AUTO (-15 to +16) Ch2 Round trip latency: AUTO (-15 to +16) Ch3 Round trip latency: AUTO (-15 to +16) tREFI: AUTO Voltage Setting O.C. Shut Down Free: Enable O.C.S.D.F CPU VID Control: 1.4500v CPU VID Special Add Limit: Disabled CPU VID Special Add: 103.30% Vcore Droop Control: Disabled DRAM Bus Voltage: 1.71v DRAM PWM Switch Frequency: Nominal DRAM PWM Phase Control: 2 Phase Operation CPU VTT Special Add: 0.0875v CPU VTT Voltage: 1.53v VTT PWM Switch Frequency: Nominal VTT PWM Phase Control: 2 Phase Operation CPU PLL Voltage: 1.80v IOH/ICH 1.1V Voltage: 1.29v IOH Analog Voltage: 1.20v 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 1 core Max Turbo Ratio: 22x 2 core Max Turbo Ratio: 21x 3 core Max Turbo Ratio: 21x 4 core Max Turbo Ratio: 21x CPU Non-Turbo Clock Ratio: 19x * BCLK/UCLK/QPI Controller Settings * QPI Control Settings: Enabled QPI Link Fast Mode: Enabled QPI Frequency: AUTO CPU Base Clock (BCLK): 230 Mhz Boot Up CPU Base Clock: AUTO PCIE Clock: 110 Mhz DRAM Frequency: 8xx Memory multipliers UnCore Frequency: 16x Uncore multipliers CPU Spread Spectrum: Disabled PCIE Spread Spectrum: Disabled
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