i7 920 max bclk on AIR = 230Bclk

eva2000

Gawd
Joined
Apr 14, 2002
Messages
539
Max 230Mhz BCLK​

I had all but given up after I found my initial max Bclk 32M Pi stable BCLK of 220Mhz with tight 878mhz 7-7-7-17 timings.

But I'd like to thank Hazzan (233BCLK) and Solarfall (230BCLK) for their inspiration with their DFI UT X58-T3EH8 max BCLK attempts as this prompted me to keep working at it :)

After numerous bios reboots and trying looser timings and a few voltage combinations, I finally surpassed my previous max memtest86+ v2.11 bootable BCLK of 224, moving all the way up to 230-231 memtest bootable. :cool:

Enough for a quick boot into windows for a CPUZ Validation at least :D





System specs
  • Intel Core i7 920 3836A756
  • Thermalright Ultra 120 Extreme + LGA1366 Bolt Thru kit + 2x 120x38mm Scythe UltraKaze 2000rpm 87cfm fans in push/pull
  • DFI LP UT X58-T3EH8 R.A51 - 01/06 beta bios
  • 128MB Gainward FX5200 PCI
  • 2x1GB Corsair DDR3-2133C9DF Dominator
  • Ram cooling: 3x 60x25mm Sunon 23.5cfm Maglev fans
  • 750GB Samsung HD753LJ
  • Pioneer DVD-RW
  • 1KW Corsair HX1000 psu
  • WinXP Pro SP3 full nLite updated hotfixes

01/06 Beta Bios settings used:
Code:
[B]Genie BIOS Setting[/B]

[B]CPU Feature[/B]
Set VR Current Limit Max: Disabled
Thermal Management Control: Disabled
EIST Function: Disabled
CxE Function: Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

[B]***** Logical Processor Setting *****[/B]
Intel HT Technology: Enabled
Active Processor Cores: All

[B]DRAM Timing[/B]
Memory Control Setting: AUTO
Memory LowGap: 1024M

DRAM Command Rate: AUTO
CAS Latency Time (tCL): 9
RAS# to CAS# Delay (tRCD): 9
RAS# Precharge (tRP): 9
Precharge Delay (tRAS): 24
REF to ACT Delay (tRFC): 88
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): 16
ACT to ACT Delay (tRRD): 6
Row Cycle Time (tRC): 31
Read CAS# Precharge (tRTP): 6
Four ACT WIN Time (tFAW): 31

[B]Voltage Setting[/B]
O.C. Shut Down Free: Enable O.C.S.D.F
CPU VID Control: 1.350v
CPU VID Special Add Limit: Enabled
CPU VID Special Add: Auto
Vcore Droop Control: Enabled
[B]DRAM Bus Voltage: 1.875v[/B]
[B]DRAM PWM Switch Frequency: Nominal[/B]
DRAM PWM Phase Control: 2 Phase Operation
[B]CPU VTT Special Add: +0.0750v
CPU VTT Voltage: 1.53v[/B]
[B]VTT PWM Switch Frequency: Nominal[/B]
VTT PWM Phase Control: 2 Phase Operation
CPU PLL Voltage: 1.80v
[B]IOH/ICH 1.1V Voltage: 1.27v
IOH Analog Voltage: 1.25v
ICH 1.5 Voltage: 1.7v[/B]
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: 17x

[B]* BCLK/UCLK/QPI Controller Settings *[/B]
QPI Control Settings: Enabled
QPI Link Fast Mode: Enabled
QPI Frequency: AUTO
CPU Base Clock (BCLK): 231 Mhz
Boot Up CPU Base Clock: AUTO
PCIE Clock: 103 Mhz
DRAM Frequency: 6x
UnCore Frequency: 12x (optimal to keep Uncore at 2x DRAM Frequency)

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled

Settings highlighted in bold were what I played with to reach 230 BCLK.
 
Very impressive. Your DFI board seems to have more useful settings for voltage than my Gigabyte. :(

I am unable to boost at 210 BCLK no matter what the multi or Uncore/Memory speeds or timings. I am very stable at every variation of 200 BCLK however.

Is it true that to go much past 200 BCLK on most boards you need to start disabling CPU features (besides HT) and power saving features? Do you also need to mess with the bus settings to keep the board from hanging due to a pci express issue? I've seen people manually dial in their pci-e speed but auto is supposed to do the same thing if you pick the default number, yes? My gut tells me people are doing this out of superstition as they chase their barely stable overclocks. :p
 
wow. i'm two i7 builds deep and both top out at 170mhz bclk. neither of which are even stress test stable 1 tick beyond that clock. mongo jealous.
 
wow. i'm two i7 builds deep and both top out at 170mhz bclk. neither of which are even stress test stable 1 tick beyond that clock. mongo jealous.

Also note, however, that he dropped the multiplier to 17. Its a bit easier to push the BCLK with the lower multiplier.
 
Also note, however, that he dropped the multiplier to 17. Its a bit easier to push the BCLK with the lower multiplier.

not that easy...

OP, u running stable on prime? Temps? HT on or off?
 
wow. i'm two i7 builds deep and both top out at 170mhz bclk. neither of which are even stress test stable 1 tick beyond that clock. mongo jealous.

Someting else isnt right here. Check your voltages and other things. 99% or more will do 220+ with a lower multiplier.
 
Someting else isnt right here. Check your voltages and other things. 99% or more will do 220+ with a lower multiplier.

never thought of lowering the multiplier. i'll dump as much as 1.4v into the chip and as soon as i fire up prime the systems restart. both are 8 hour orthos stable while paging 6gb of ram with .03v and .04v vcore respectively.
 
Very impressive. Your DFI board seems to have more useful settings for voltage than my Gigabyte. :(

I am unable to boost at 210 BCLK no matter what the multi or Uncore/Memory speeds or timings. I am very stable at every variation of 200 BCLK however.

Is it true that to go much past 200 BCLK on most boards you need to start disabling CPU features (besides HT) and power saving features? Do you also need to mess with the bus settings to keep the board from hanging due to a pci express issue? I've seen people manually dial in their pci-e speed but auto is supposed to do the same thing if you pick the default number, yes? My gut tells me people are doing this out of superstition as they chase their barely stable overclocks. :p
depends on cpu, board and also ram used - i have no probs with ht enabled and all full power up to 220 bclk without touching ICH/IOH voltages

higher PCI-E frequency = slight better 3d benchmark scores :)

wow. i'm two i7 builds deep and both top out at 170mhz bclk. neither of which are even stress test stable 1 tick beyond that clock. mongo jealous.
thanks... sure if you keep at it you should be able to get more out of your rig :)

Also note, however, that he dropped the multiplier to 17. Its a bit easier to push the BCLK with the lower multiplier.
see below results ;)

not that easy...

OP, u running stable on prime? Temps? HT on or off?
not at that 230bclk, see my full results at http://i4memory.com/f80/dfi-lanpart...os-bios-overclocking-information-guide-12855/

never thought of lowering the multiplier. i'll dump as much as 1.4v into the chip and as soon as i fire up prime the systems restart. both are 8 hour orthos stable while paging 6gb of ram with .03v and .04v vcore respectively.
multi doesn't help as much as you think, i can get to 220bclk on all cpu multipliers including 21x but exception is 20x which is harder heh



more

Max BCLK Super Pi 32M Benchable​

Did a fresh hard drive install which is WinXP Pro SP3 & Windows 7 beta dual bootable before attempting max Super Pi 32M benchable Bclk frequency tests. This time with 3x1GB Samsung HCF0 based modules for triple channel :)

System specs
  • Intel Core i7 920 3836A756
  • Thermalright Ultra 120 Extreme + LGA1366 Bolt Thru kit + 2x 120x38mm Scythe UltraKaze 2000rpm 87cfm fans in push/pull
  • DFI LP UT X58-T3EH8 R.A51 - 01/06 beta bios
  • 128MB Gainward FX5200 PCI
  • 2x1GB Corsair DDR3-2133C9DF Dominator + 1GB G.Skill PC3-12800HZ (3x Samsung HCF0)
  • Ram cooling: 3x 60x25mm Sunon 23.5cfm Maglev fans
  • 80GB Hitachi 7K80 SATAII
  • Pioneer DVD-RW
  • 1KW Corsair HX1000 psu
  • WinXP Pro SP3 full nLite updated hotfixes / Windows 7 beta dual boot

Triple Channel CPUZ Validation @229Bclk
Haven't pushed ICH 1.5 Voltage yet like I did for 230Bclk, so that will be next up for testing.



QPI Frequency = 4123Mhz!



Super Pi 32M
Ignore the times just testing with loose timings. Higher Bclk do require more vdimm that usual due to QPI ceiling. Without enough vdimm DFI post diagnostic LED = CF code for lack of vdimm voltage.

@226Bclk bios set - QPI Frequency = 4063Mhz

spi32m_9m01s750ms.png


@226Bclk setFSB windows set - QPI Frequency = 4074Mhz

spi32m_9m00s468ms.png


@227Bclk - QPI Frequency = 4088Mhz

spi32m_8m57s750ms.png


@228Bclk - QPI Frequency = 4110Mhz
- had to bump vdimm, vcore and CPU VTT Special percentage added
- either a bad run, or lack of volts for either vdimm or CPU VTT or both led to slower 32M Pi time ?

spi32m_9m00s203ms.png





01/06 Beta Bios settings used:
Code:
[B]Genie BIOS Setting[/B]

[B]CPU Feature[/B]
Set VR Current Limit Max: Disabled
Thermal Management Control: Disabled
EIST Function: Disabled
CxE Function: Disabled
Execute Disable Bit: Disabled
Virtualization Technology: Disabled
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

[B]***** Logical Processor Setting *****[/B]
Intel HT Technology: Enabled
Active Processor Cores: All

[B]DRAM Timing[/B]
Memory Control Setting: AUTO
Memory LowGap: 1024M

DRAM Command Rate: AUTO
CAS Latency Time (tCL): 9
RAS# to CAS# Delay (tRCD): 9
RAS# Precharge (tRP): 9
Precharge Delay (tRAS): 24
REF to ACT Delay (tRFC): 88
Write to PRE Delay (tWR): AUTO
Rank Write to Read (tWTR): 16
ACT to ACT Delay (tRRD): 6
Row Cycle Time (tRC): 31
Read CAS# Precharge (tRTP): 6
Four ACT WIN Time (tFAW): 31

[B]Voltage Setting[/B]
O.C. Shut Down Free: Enable O.C.S.D.F
CPU VID Control: 1.350v * 1.3875v
CPU VID Special Add Limit: Enabled
CPU VID Special Add: Auto
Vcore Droop Control: Enabled
[B]DRAM Bus Voltage: 1.875v & 1.905v[/B]
[B]DRAM PWM Switch Frequency: Nominal[/B]
DRAM PWM Phase Control: 2 Phase Operation
[B]CPU VTT Special Add: +0.0375v & +0.0500v
CPU VTT Voltage: 1.53v[/B]
[B]VTT PWM Switch Frequency: Nominal[/B]
VTT PWM Phase Control: 2 Phase Operation
CPU PLL Voltage: 1.80v
[B]IOH/ICH 1.1V Voltage: 1.25v
IOH Analog Voltage: 1.20v
ICH 1.5 Voltage: 1.5v[/B]
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: 18x

[B]* BCLK/UCLK/QPI Controller Settings *[/B]
QPI Control Settings: Enabled
QPI Link Fast Mode: Enabled
QPI Frequency: AUTO
CPU Base Clock (BCLK): 226 to 229 Mhz
Boot Up CPU Base Clock: AUTO
PCIE Clock: 103 Mhz
DRAM Frequency: 8x
UnCore Frequency: 16x (optimal to keep Uncore at 2x DRAM Frequency)

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
 
31c at 4ghz? do you have your case outside or something because those temps are too good to be true at that clock speed!!
 
SG app temps under report temps and only raise by 1-3C under load LOL - ignore the temps
 
Amazing what a water cooling can do for max stable bclk too. On air 228 bclk was max for 32M pi, but on H20 straight boot from bios 32M done at 230blck with ease!

229bclk boot from bios

hpi32m_single_9m58s560ms.png


230bclk boot from bios

hpi32m_single_9m54s551ms.png



231bclk 32M Passed :D

spi32_9m51s646ms.png


232bclk 1M

spi1m_11s092ms.png


setfsb bump from 230bclk to 233bclk



cpuzvalid.png


System:
  • i7 920 3836A756
  • EK Supreme LT 1366 / FESER 480 / MCP655
  • 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 SP1
 
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