Input on i7 930 3.8ghz settings for first OC

Could use some input on different settings, temps, vcore, and how some things work for ocing my i7 930. First OC so I would be more than willing to hear any input you all may have. I'm currently hitting 72C max when running LinX and around 70c max when running prime95 for about 20hrs, seems like it should maybe be running cooler than this at these voltages? Let me know if you want any more specs

Hardware
asus P6X58D premium
i7-930
sapphire toxic 5850
corsair 3x2gb ram setup at 7-7-7-20 @1.65v
corsair h80
corsair hx650 psu

BIOS Settings
Ai Overclock Tuner.....................[Manual]
CPU Ratio Setting......................[21.0]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Xtreme Phase Full Power Mode...........[Enabled]
BCLK Frequency.........................[181]
PCIE Frequency.........................[100]
DRAM Frequency.........................[DDR3-1451MHz]
UCLK Frequency.........................[2903MHz]
QPI Link Data Rate.....................[Auto]

CPU Voltage Control....................[Manual]
CPU Voltage............................[1.23750]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.37500]
IOH Voltage............................[1.10]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.10]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[1.65]
DRAM DATA REF Voltage on CHA...........[Auto]
DRAM CTRL REF Voltage on CHA...........[Auto]
DRAM DATA REF Voltage on CHB...........[Auto]
DRAM CTRL REF Voltage on CHB...........[Auto]
DRAM DATA REF Voltage on CHC...........[Auto]
DRAM CTRL REF Voltage on CHC...........[Auto]

Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[Auto]
CPU Clock Skew.........................[Auto]
CPU Spread Spectrum....................[Disabled]
IOH Clock Skew.........................[Auto]
PCIE Spread Spectrum...................[Disabled]

C1E Support............................[Disabled]
Hardware Prefetcher....................[Enabled]
Adjacent Cache Line Prefetch...........[Enabled]
Intel(r) Virtualization Tech...........[Disabled]
CPU TM Function........................[Enabled]
Execute Disable Bit....................[Enabled]
Intel(r) HT Technology.................[Enabled]
Active Processor Cores.................[All]
A20M...................................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Intel(r) C-STATE Tech..................[Disabled]

OC Temps: 43c @idle 70c @full load

Everything looks fine to me. I also have an i7 930 currently at 3.4GHz, but I have gone past your current clock(3.8). Your temps are almost identical to mine. I get around 40C idle, and max of 70C with prime and liquid cooling from astek. My vcore is 1.224v with load though, and drops to .924v at idle. You may be able to continue to drop the vcore, but I hear I got pretty lucky with my chip. I have also been told that you should not go above 85C at load, so you may be able to go up to 4.0GHz without problems if you are shooting for that.

The only problem for me is 1333 ram! I can't OC my chip very high without have to drop my RAM frequency to about 1100 with the multiplier at 6.

Anyways, with some regular member opinion, it looks good! I would expect more out of your cooler though, what are the ambient temps?

I agree, I was expecting a bit more out of the h80, although maybe it needs to be reseated. My ambient temps are around 25c. Your vcore drops from 1.224 to .924 when you're running at 3.8ghz? Do you have load line calibration enabled? I'm not too familiar with how the i7 930 oc's in general but that seems like an incredibly low voltage to run that stable.

I had, I think SpeedStep on, so when at low loads, my CPU throttles back down to 181x12(2.1GHz). So, then my vcore drops down as well to save power, and keep temps lower at idle.

So now at 3.4GHz, my vcore drops to .924v, and my CPU goes down to 160x12(1.9GHz). My vcore is very dynamic.

Okay that makes sense, I disabled speedstep. By the way i forgot to mention in my initial post but i have HT enabled

I would turn on C-STATE and SpeedStep. I believe those are the two power saving features that automatically lower your multiplier and vcore.

Hello,


It is the first time in my life that I OC a CPU, and thanks to you I made it !
BUT I just copy/paste the settings from you ...

I've got the same configuration as yours.
I want to know which settings i need to change to get from 3.8Ghz to 4.2 Ghz ( i have a good cooling system )

And BTW is it safe to put DRAM Bus Voltage to 1.65 ? when I do so the mobo warns me that it is not safe so i lower it to 1.64

What I have to change here :

BIOS Settings
Ai Overclock Tuner.....................[Manual]
CPU Ratio Setting......................[21.0]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Xtreme Phase Full Power Mode...........[Enabled]
BCLK Frequency.........................[181]
PCIE Frequency.........................[100]
DRAM Frequency.........................[DDR3-1451MHz]
UCLK Frequency.........................[2903MHz]
QPI Link Data Rate.....................[Auto]
*********************************************************************
CPU Voltage Control....................[Manual]
CPU Voltage............................[1.23750]
CPU PLL Voltage........................[1.80]
QPI/DRAM Core Voltage..................[1.37500]
IOH Voltage............................[1.10]
IOH PCIE Voltage.......................[1.50]
ICH Voltage............................[1.10]
ICH PCIE Voltage.......................[1.50]
DRAM Bus Voltage.......................[1.65]
DRAM DATA REF Voltage on CHA...........[Auto]
DRAM CTRL REF Voltage on CHA...........[Auto]
DRAM DATA REF Voltage on CHB...........[Auto]
DRAM CTRL REF Voltage on CHB...........[Auto]
DRAM DATA REF Voltage on CHC...........[Auto]
DRAM CTRL REF Voltage on CHC...........[Auto]
*********************************************************************
Load-Line Calibration..................[Enabled]
CPU Differential Amplitude.............[Auto]
CPU Clock Skew.........................[Auto]
CPU Spread Spectrum....................[Disabled]
IOH Clock Skew.........................[Auto]
PCIE Spread Spectrum...................[Disabled]

C1E Support............................[Disabled]
Hardware Prefetcher....................[Enabled]
Adjacent Cache Line Prefetch...........[Enabled]
Intel(r) Virtualization Tech...........[Disabled]
CPU TM Function........................[Enabled]
Execute Disable Bit....................[Enabled]
Intel(r) HT Technology.................[Enabled]
Active Processor Cores.................[All]
A20M...................................[Disabled]
Intel(r) SpeedStep(tm) Tech............[Disabled]
Intel(r) C-STATE Tech..................[Disabled]
OC Temps: 43c @idle 70c @full load




Best regards.
I don't know if my english is good. I'm writing from Belgium and English os not my mother language.

4.2 might be difficult to reach with a 930. Try for 4.0Ghz first.

Most people reaching 4.2+ with Bloomfield are also turning off Hyperthreading and/or not running their computers at 24/7 load - which is lame in my opinion.

45nm processors were pretty tolerant of voltage. Assuming your uncore voltage (VTT) isn't super low (less than 1.1v) then 1.65v memory shouldn't be a problem.

remember, it is the voltage differential that kills you. People forget that lesson from the Athlon64 days.

Hopefully others here have more specific advice on the Asus bios settings.

191x21 will get you 4.0GHz, I would raise my vcore to 1.25v and start from there. By the way, what kind of RAM are you running(speed, size, brand, etc.)

I made exactly the same input that i found in the first post.

my memory :

Corsair XMS3 Memory - 6 GB : 3 x 2 GB - DIMM 240-PIN - DDR3

: 6 GB : 3 x 2 GB

: DDR3 SDRAM
: DIMM 240-PIN
: 1600 MHz ( PC3-12800 )
: no-ECC
: CL7 ( 7-8-7-20 )
: 1.65 V

today i'm away from home. I will test the new inputs on Wednesday.

for now everything is working well @ 3.8GHz