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eva2000
01-13-09, 11:36 AM
Max 230Mhz BCLK

I had all but given up after I found my initial max Bclk 32M Pi stable BCLK of 220Mhz (http://i4memory.com/102546-post8.html) with tight 878mhz 7-7-7-17 timings.

But I'd like to thank Hazzan (http://www.xtremesystems.org/forums/showthread.php?t=212483) (233BCLK) and Solarfall (http://www.xtremesystems.org/forums/showthread.php?t=214360) (230BCLK) for their inspiration with their DFI UT X58-T3EH8 max BCLK attempts as this prompted me to keep working at it :thumbsup:

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. (nana2)

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

http://valid.canardpc.com/cache/banner/483781.png (http://valid.canardpc.com/show_oc.php?id=483781)

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/corsair/2133c9df_2gb/hton/17x/droopoff/maxbclk/230mhz/cpuzvalid_tnn.png (http://valid.canardpc.com/show_oc.php?id=483781)

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 (http://i4memory.com/f80/dfi-lanparty-ut-x58-t3eh8-lga1366-photos-bios-overclocking-information-guide-12855/) - 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:
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
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

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

DRAM Timing
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

Voltage Setting
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
DRAM Bus Voltage: 1.875v
DRAM PWM Switch Frequency: Nominal
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: +0.0750v
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: 1.27v
IOH Analog Voltage: 1.25v
ICH 1.5 Voltage: 1.7v
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

* BCLK/UCLK/QPI Controller Settings *
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.

bob saget
01-14-09, 02:32 AM
is the 920 easier to overclock with less RAM, or how does that work?

Muppet
01-14-09, 02:42 AM
Very nice bclk. :) What was the Qpi voltage you needed for that.

eva2000
01-14-09, 05:39 AM
is the 920 easier to overclock with less RAM, or how does that work?

Very nice bclk. :) What was the Qpi voltage you needed for that.

i had unmatched modules for tri channel, so yes matched dual channel was easier to clock but will be repeating with unmatched tri channel modules now i have figure out the voltages

qpi = cpu vtt in bios settings for dfi x58 so 1.53+0.075v = 1.60v QPI uncore volts

eva2000
01-15-09, 09:34 AM
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 (http://i4memory.com/f80/dfi-lanparty-ut-x58-t3eh8-lga1366-photos-bios-overclocking-information-guide-12855/) - 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.

http://valid.canardpc.com/cache/banner/485164.png (http://valid.canardpc.com/show_oc.php?id=485164)

QPI Frequency = 4123Mhz!

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/gskill_corsair/12800hz80_2133c9df/18x/hton/doff/4xmem/229_916_99924_rfc88_rtw16_rrd6_rtp6_rc31_faw31_1.3 875-1.905-1.53_05_125120/cpuz_valid_tn.png (http://valid.canardpc.com/show_oc.php?id=485164)

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

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/gskill_corsair/12800hz80_2133c9df/18x/hton/doff/4xmem/226_902_99924_rfc88_rtw16_rrd6_rtp6_rc31_faw31_1.3 5-1.875-1.53_0375_125120/spi32m_9m01s750ms.png

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

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/gskill_corsair/12800hz80_2133c9df/18x/hton/doff/4xmem/226_905_99924_rfc88_rtw16_rrd6_rtp6_rc31_faw31_1.3 5-1.875-1.53_0375_125120/spi32m_9m00s468ms.png

@227Bclk - QPI Frequency = 4088Mhz

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/gskill_corsair/12800hz80_2133c9df/18x/hton/doff/4xmem/227_908_99924_rfc88_rtw16_rrd6_rtp6_rc31_faw31_1.3 5-1.875-1.53_0375_125120/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 ?

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_1/gskill_corsair/12800hz80_2133c9df/18x/hton/doff/4xmem/228_913_99924_rfc88_rtw16_rrd6_rtp6_rc31_faw31_1.3 875-1.905-1.53_05_125120/spi32m_9m00s203ms.png




01/06 Beta Bios settings used:
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
TDC Enable: Disabled
x TDC Limit: 0
TDP Enable: Disabled
x TDP Limit: 0

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

DRAM Timing
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

Voltage Setting
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
DRAM Bus Voltage: 1.875v & 1.905v
DRAM PWM Switch Frequency: Nominal
DRAM PWM Phase Control: 2 Phase Operation
CPU VTT Special Add: +0.0375v & +0.0500v
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: 1.25v
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: 18x

* BCLK/UCLK/QPI Controller Settings *
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

eva2000
01-15-09, 09:39 AM
whoops double post

Toss3
01-15-09, 10:13 AM
Wow crazy ram overclocks! :)

Think the DFI and Gigabyte boards are the best ones for overclocking the i7 series; checked the overclocking 920 thread over at xtremesystems and noticed that everyone using the p6t deluxe were getting piss overclocking results at speeds higher than 3,8Ghz<.

3,8Ghz boots fine at 1,15V while it takes 1,35V for me to reach 4,0Ghz(isn't even stable). :(

That dfi of yours seem to be doing pretty fine! ;)

eva2000
01-16-09, 01:09 AM
thanks Toss3 :)

3838A batch you have maybe not the best http://i4memory.com/f55/i7-920-batch-ocing-results-please-share-13570/

eva2000
02-06-09, 08:20 AM
i7 920 3836A756 #2
Max BClock
Testing 2nd twin batch cpu and definitely this second i7 920 3836A756 is better than my first one in terms of max Bclock and low CPU VTT usage.

i7 920 3836A756 #1 results here (http://i4memory.com/f80/dfi-ut-x58-t3eh8-i7-920-230-bclk-13569/)

max memtest86+ bootable bclk = 224 requiring 1.58-1.60v CPU VTT
max super pi 32m bclk = 222bclk (without IOH/ICH voltage tweaks) & 228bclk (with IOH/ICH voltage tweaks) requiring 1.60-1.61v CPU VTT
max CPUZ Validation = 230bclk requiring 1.60-1.63v CPU VTT


i7 920 3836A756 #2

max memtest86+ bootable bclk = 229bclk requiring 1.40-1.48v CPU VTT
max super pi 32m bclk = 227bclk (without IOH/ICH voltage tweaks) & ???bclk (with IOH/ICH voltage tweaks TBD) requiring 1.48-1.50v CPU VTT
max CPUZ Validation = 231bclk requiring 1.50v CPU VTT


TBD - Haven't tested 2nd cpu with IOH/ICH tweaks yet

System specs

Intel Core i7 920 3836A756 #2
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 (http://i4memory.com/f80/dfi-lanparty-ut-x58-t3eh8-lga1366-photos-bios-overclocking-information-guide-12855/) - 01/23 beta bios
128MB Gainward FX5200 PCI or 512MB Inno3D 8800GT OC Edition
6GB (3x2GB) Corsair TR3X6G2000C7GT Dominator GT DDR3-2000Mhz 7-8-7-20 1.65v (http://nx.i4memory.com/reviewimages/memory/corsair/dominatorgt/tr3x6g2000c7gtf/content/bin/images/large/TR3X6G2000C7GT_10.jpg)
80GB Hitachi 7K80 SATAII or 750GB Samsung SATAII
Pioneer DVD-RW
1KW Corsair HX1000 psu
WinXP Pro SP3 full nLite updated hotfixes / Windows 7 beta dual boot


Max Validation @231Bclock

CPU VTT = 1.50v

http://valid.canardpc.com/cache/banner/500973.png (http://valid.canardpc.com/show_oc.php?id=500973)

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_2/corsair/dominatorgt/312/19x/doff/4xmem/231_924_78720_rfcA_rwA_rtwA_rrdA_rtpA_rcA_fawA_1.3 375-1.635-1.5_rd15/cpuz_valid.png (http://valid.canardpc.com/show_oc.php?id=500973)

Max Screenshot @228Bclk with low CPU VTT

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_2/corsair/dominatorgt/312/19x/doff/4xmem/maxbclk/228.png

Max 32M @225Bclk

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_2/corsair/dominatorgt/312/19x/doff/4xmem/226_902_78720_rfcA_rwA_rtwA_rrdA_rtpA_rcA_fawA_1.3 375-1.635-1.5_rd15/spi32m_9m15s594ms.png

Max 32M @227Bclk

http://fileshosts.com/intel/DFI/DFI_UT_X58_T3EH8/results/true120/920_3836a756_2/corsair/dominatorgt/312/19x/doff/4xmem/227_908_78720_rfcA_rwA_rtwA_rrdA_rtpA_rcA_fawA_1.4 5-1.635-1.48_rd15/spi32m_8m20s344ms.png

Xenozx
02-07-09, 02:38 AM
Very nice overclock.

Just a question if I may, I used your settings to try to get my max OC. I wanted 4.0ghz, but I used your voltages and stuff to help stabilize.

my question is, for some reason, when I go over like 3.6ghz, the Turbo mode stops working? Is that a glitch, or is it being done on purpose?

Also, just a question, but when you can boot into windows and do super PI and everything, and even play games like COD5, but if you do a 4 or 8 thread prime 95, and it causes your PC to lock up, you get a bunch of white/black squiggly lines, and the your PC BSOD's, and reboots, what is that a symptom of? Does that mean the CPU is toping out? I dont think its my DFI board, as I had the same issue on a P6T.

Any ideas?

I am assuming maybe I got a chip that cant chart into the 4.0ghz territory, which would really sucK :(

Xenozx
02-07-09, 03:08 AM
just to follow up

I am 100% rock stable at 3.8ghz. I can prime 95 all day, and max temp is like 65c.

for 3.8 stable my settings are

1.3v vcore
190 BLK
Mult 20x
ram 8x (1520mhz 8-8-8-22)

PLU voltage 1.80
VTT 1.48 w/ (+.250v)


When going for 4.0ghz, Ive drive all the way up to a vcore of 1.425

Ive tried PLU's up to 2.00
Ive tried VTT of 1.60 + and every option from 0.250v to 0.1000v

Every other combination = BSOD.

I dont know why those 200 extra mhz, ruin all the fun :(

Muppet
02-07-09, 03:18 AM
Very nice overclock.

Just a question if I may, I used your settings to try to get my max OC. I wanted 4.0ghz, but I used your voltages and stuff to help stabilize.

my question is, for some reason, when I go over like 3.6ghz, the Turbo mode stops working? Is that a glitch, or is it being done on purpose?

Also, just a question, but when you can boot into windows and do super PI and everything, and even play games like COD5, but if you do a 4 or 8 thread prime 95, and it causes your PC to lock up, you get a bunch of white/black squiggly lines, and the your PC BSOD's, and reboots, what is that a symptom of? Does that mean the CPU is toping out? I dont think its my DFI board, as I had the same issue on a P6T.

Any ideas?


I am assuming maybe I got a chip that cant chart into the 4.0ghz territory, which would really sucK :(
When you get a bsod running Prime95, it means your not stable. Where you running blend or smallFFT. To get 4.0 stable running Prime95 you'll need 1.4+ volts IMO.

Xenozx
02-07-09, 03:46 AM
ya, I tried 1.45v at 4.0ghz, and still a no go.

I can start prime 95, at 4.0ghz, and within 2 minutes I get the BSOD.

Right now I am at 3.9ghz, (195x20) and have the voltage at 1.325 and I get no BSOD's at all, 100% stable.

I dont understand why 4.0ghz, is just unatainable for this chip. I wouldnt think to pull an extra 100mhz, it would need .125+ more voltage and then some. at 1.325 my temps get to about 70c. at 1.45v it was topping out arround 86c. That extra voltage to me isnt worth it. I guess I am just gonna need to be happy with 3.9. I thought it would be really kool to see 4.0ghz stable, but apparently, its just not gonna happen with this chip.

in my previous endevors with overclocking, usually uping the voltage let you go as high as you wanted clock wise, even if the voltage was too much or made the temps too high lol.

This is the first chip I played with where no ammount of voltage helps out with the overclock :(

Muppet
02-07-09, 06:01 AM
ya, I tried 1.45v at 4.0ghz, and still a no go.

I can start prime 95, at 4.0ghz, and within 2 minutes I get the BSOD.

Right now I am at 3.9ghz, (195x20) and have the voltage at 1.325 and I get no BSOD's at all, 100% stable.

I dont understand why 4.0ghz, is just unatainable for this chip. I wouldnt think to pull an extra 100mhz, it would need .125+ more voltage and then some. at 1.325 my temps get to about 70c. at 1.45v it was topping out arround 86c. That extra voltage to me isnt worth it. I guess I am just gonna need to be happy with 3.9. I thought it would be really kool to see 4.0ghz stable, but apparently, its just not gonna happen with this chip.

in my previous endevors with overclocking, usually uping the voltage let you go as high as you wanted clock wise, even if the voltage was too much or made the temps too high lol.

This is the first chip I played with where no ammount of voltage helps out with the overclock :(

It could very well be Ram voltage or QPI volts that need a bump up. Trial and error is the only way to find out what you need.

Xenozx
02-07-09, 01:06 PM
Thanks, im toying with it as i can. I enjoy trying to get max overclock, but it just seems this current setup is stubborn :(

Thanks for mentioning other 2 things. I never did mess with my ram voltage as i read 1.65 was as high as you should go. Then I looked into it a bit more and read about the 0.5v rule with VTT. at stable, I tried to increase my ram voltage to 1.75 just to see if it would make a difference and I got an instant BSOD before geting into windows. So I tried 1.7 and same thing. went down to 1.68 and it was fine. So, no go on the ram upage.

Then I decided to play with VTT some more. As I mentioned, I tried everything from 1.4v to 1.6v. Well I just dropped down to 1.34v, and added some more stability. So I am going to play with 4.0ghz some more with a lower VTT, cause right now it seems to be working wonders. I am at 4.0ghz typing this with 8thread prime going hard. Never could do this before :) Wish me luck.

eva2000
02-10-09, 10:14 AM
Oh air 4ghz might not be prime stable for most folks.. temps and heat are a factor.

Best to read up on my tips post for DFI UT X58-T3EH8 should give you more ideas and configurations to test http://i4memory.com/102537-post3.html :)