I can't push the Bclk to more than 190. help?

[snowdude1492]

Hey guys, I've asked you this question before but no suggestions worked. currently my i7 920 D0 is running at a bclk of 190 and with speed step its at 3.997 GHz. My temps are low (~24C idle, ~63C 100% load for a while). my system right now is very stable and I've had no problems, but when I up the bclk it freezes when it say starting windows. and its stuck for hours, but it never crashes. Ive tried boosting the Vcore and the QPI voltage, but nothing is succesful.

My current voltages:
dimm 1.65V
Vcore 1.325V
PLL 1.875V( I tried 1.8 too)
ICH and IOH 1.2V (I tried the defalts as well)
QPI 1.4V (i tried everything from 1.1)

Thanks guys! please help me! I know I can go higher but it won't let me.

 

[overshocked]

Has your memory reached its limit?

Have your tried a pci-e bump up?

 

[snowdude1492]

the mem is below stock[by only about 88mhz)(corsair dominator 1600mhz C8) and timings are at default.

 

[snowdude1492]

When I have the bclk at 200 my mem runs at spec.

 

[snowdude1492]

And how much of a pci bump? I have a 5870 and I'm worried what it might do to it.

 

[ahnilated]

My current I7 920 D0 setup on an Asus P6T deluxe V2, Corsair 7-7-7-20 1.65 volt ram 3x2GB, 1100 watt PS.

Ai Overclock Tuner Manual
CPU Ratio Setting 20
Intel SpeedStep Tech Disabled
BCLK Frequency 200
DRAM Frequency DDR3-1603MHz
UCLK Frequency 3208 MHz
QPI Link Data Rate 7218 MT/s
CPU Voltage 1.31250
CPU PLL Voltage 1.90
QPI/DRAM Core Voltage 1.35
DRAM Bus Voltage 1.64
CPU Differential Amplitude 1000mV
________________________
DRAM CAS# Latency 7
DRAM RAS# to CAS# Delay 7
DRAM RAS# PRE Time 7
DRAM RAS# ACT Time 20
________________________

This system is rock stable for my setup. It runs Prime 95 for 24hrs with no errors and has run Seti for the last 2 months with no crashes.

 

[overshocked]

And how much of a pci bump? I have a 5870 and I'm worried what it might do to it.

You usually only need a pci-e bump up when pushing 220b-clock, but you could try it. Just try setting it to 101mhz.

 

[snowdude1492]

thanks, if that doesn't work should I try 102 or is that too high?

 

[pluke the 2]

My current I7 920 D0 setup on an Asus P6T deluxe V2, Corsair 7-7-7-20 1.65 volt ram 3x2GB, 1100 watt PS.

Ai Overclock Tuner Manual
CPU Ratio Setting 20
Intel SpeedStep Tech Disabled
BCLK Frequency 200
DRAM Frequency DDR3-1603MHz
UCLK Frequency 3208 MHz
QPI Link Data Rate 7218 MT/s
CPU Voltage 1.31250
CPU PLL Voltage 1.90
QPI/DRAM Core Voltage 1.35
DRAM Bus Voltage 1.64
CPU Differential Amplitude 1000mV
________________________
DRAM CAS# Latency 7
DRAM RAS# to CAS# Delay 7
DRAM RAS# PRE Time 7
DRAM RAS# ACT Time 20
________________________



This system is rock stable for my setup. It runs Prime 95 for 24hrs with no errors and has run Seti for the last 2 months with no crashes.

"UCLK Frequency 3208 MHz "

Wow, isn't that super low?

 

[pluke the 2]

PS, how do you copy all of your bio's settings? so that I can paste mine to try and help

 

[snowdude1492]

idk. But i've tried other's settings and they don't help. But its worth another shot.

 

[snowdude1492]

I tried bumping the PCI to 101 and it didn't work. It gave me a blue screen while booting until I bumped the QPI to 1.425V and the Vcore to 1.3375. and then it did the same as before.

does this mean my i7 is faulty or the one of a milion that can't make 4 ghz?

 

[belial2k]

You have a lot of room to up your CPU voltage...keep it under 1.4, but try upping that some. If your board has auto setting you might raise the bclk to 200, leave everything else on auto and see if she boots from there...then start working your way down from the auto settings (auto settings always apply too much juice)

 

[snowdude1492]

okay I'll try that.
Also when I run stress tests It freezes and goes grey in a matter of seconds. I've been boosting the vcore but I've never got it to work. I boosted the QPI to 1.425 and its still the same.
Help there too?

Sorry for all the problems

 

[overshocked]

maybe you just hit the limit of this cpu.

What are the temps?

 

[snowdude1492]

low when on ~35-40C idle it crashes before i can see the load temp.

 

[snowdude1492]

Do you think its overheating, or its the literal limit.

 

[overshocked]

low when on ~35-40C idle it crashes before i can see the load temp.

well the crashing is from instability....

so i would say this is the limit.

 

[snowdude1492]

why can other i7s do this at much lower vcores, and mine requires a much higher vcore and its not stable?

 

[pluke the 2]

Because of a bad batch.

 

[one-shot]

I have an ASUS P6T board with my i7 920. These are the settings for 3.6GHz

1.30V CPU
1.35V QPI
1.92V PLL
1.64V IMC
RAM Timings: 7-7-7-24
BCLK: 180
Multi: X20
Speedstep and turbo mode were turned off
Everything else was on auto

I stress tested for 22 hours using Prime 95 with small FFTs. I'm in a warm room now, so I need better cooling to be able to use HT/SMT without going over the max temp.

 

[overshocked]

why can other i7s do this at much lower vcores, and mine requires a much higher vcore and its not stable?

They just have a really good batch.

 

[belial2k]

For reference, Toms uses 1.45v to overclock intels, and has for a long time. So expecting a huge overclock at 1.3 is not very realistic. Plus, a lot of people claim huge overclocks on low voltages without ever really stress testing it with prime 95. Sure, they might boot at that, but it won't pass a 100% cpu stress test.

 

[flabbergasted]

I agree more juice is needed.

 

[snowdude1492]

For reference, Toms uses 1.45v to overclock intels, and has for a long time. So expecting a huge overclock at 1.3 is not very realistic. Plus, a lot of people claim huge overclocks on low voltages without ever really stress testing it with prime 95. Sure, they might boot at that, but it won't pass a 100% cpu stress test.

for the vcore, or the QPI?