The i7 Overclocking Study Thread... post your OC settings.

[Hot'n'Chilly]

Hello everybody. As some of you may know from my postings in the general i7 overclocking thread, I am attempting to collect data on people's i7 overclocks in order to figure out what allows some users to get relatively high OC's on such low voltages.

My hypothesis is that the secrete is in how all the various settings and voltages relate to each other... in a sort of harmony. Thus many of us who seem stuck at high voltage overclocks may be in that situation more as a result of an unbalance in settings/voltages than in your "unlucky" batch number.

So... here is what I need in order to complete this study: Will those of you who have relatively low voltage 3.8ghz i7 overclocks and higher please post in your complete settings and voltages, as well as basic system info such as your CPU, batch number (if you know it), motherboard, and CPU cooler. Leave nothing out please. It is very important that I have equivalent data from each of you in order to compare them precisely. Also, will you please try to post the data in a roughly similar fashion that I give below in the example.

Heres an example of how I'd like the data to be posted. But if you have more settings or voltages please include them, as this is only a basic example.

================================================== ==================================

System Info:

i7 920 @ 3.8ghz (Batch 3837A769), Asus P6T Deluxe motherboard (1003 BIOS), OCZ Platinum DDR3 1333 RAM, Noctua air cooler

Settings:

CPU Ratio: 19x
BCLK: 200
DRAM: 1203 mhz
UCLK: 3208 mhz
QPI: 7218 MTs
HT: On
Everything else: Untouched

Voltages:

CPU Voltage: 1.32v
PLL Voltage: 1.84v
QPI Voltage: 1.3375v
DRAM Voltage: 1.60v
All other voltages: Untouched

Notes:

Max temp 73c under Prime95 testing. Prime stable for 8 hours.

================================================== ==================================

Thats it, I just need the data. If you want to include other info or notes as well that would be fine. Hopefully all this will help us unlock the mysteries of the i7. Once I have a good amount of data collected I will compile it, test, and of course share all the results. And if any other members would like to take the data and run tests of their own that would be great as well. Thanks to everybody in advance for donating your info

[Chicken Patty]

here are mine


200*21 Turbo enabled = 4.2 GHz HT on

Batch # 3839A403

Voltages, I was able to turn all voltages down and still run stable, this was just benching settings at first. The only voltage that stayed untouched was the CPU voltage


CPU vcore - 1.35v
CPU VTT - +300
CPU PLL - AUTO
Dimm V - 1.65v
DIMM DQ - +0
QPI PLL - 1.4v
IOH v - 1.4
IOH/ICH I/O - 1.65v
ICH - 1.250

[ReverendMaynard]

Batch # 3837B194


i7 920 @ 4.20ghz, EX58-Extreme, Patriot Viper DDR3 1600 RAM, w/c by GTZ, 2x120 MCR220


CPU Vcore 1.4125v in bios, 1.376v idle, 1.36v load
QPI/VTT Voltage 1.375v
CPU PLL 1.86v
DRAM 1.66v
PCIE 1.5v
QPI PLL 1.14v
IOH Core 1.16v
ICH I/O 1.58v
ICH Core 1.14v

No cpu related voltages set to auto.

100% stable, not one crash, freeze or BSOD during 100's of various bench runs and 50hrs of gaming.

[Chicken Patty]

^^^ nice. ran prime yet?

[tot31]

System Info:

i7 920 @ 3.8Ghz (Batch# 3841A383), Asus P6T Non-Deluxe motherboard (0112 BIOS), Asus 3 x 1GB DDR3 1333 RAM, Deepcool Ice Blade Pro air cooler

BIOS Settings

AI Tweaker
Ai Overclock Tuner [Manual]
CPU Ratio Setting [19]
BCLK Frequency [200]
PCIE Frequency [100]
DRAM Frequency [Auto]
QPI Frequency [Auto]
DRAM Timing Control [Auto]

These are the settings that I entered manually, the rest of the settings I leave them to AUTO.
CPU Voltage [1.145]
DRAM Bus Voltage [1.60]
Load Line Calibration [Enable]
CPU Clock Skew [Delay 100ps]
CPU Spread Spectrum Disable]
IOH Clock Skew [Delay 100ps]
PCIE Spread Spectrum [Disable]

Advance Menu -> CPU Configuration
CPU Ratio Setting [19]
C1E Support [Disabled]
Hardware Prefetcher [Enabled]
Adjacent Cache Line Prefetch [Enabled]
Intel Virtualization Tech [Disabled]
CPU TM function [Disabled]
Execute-Disable Bit [Enabled]
Intel HT Technology [Disabled]
Active Processor Cores [All]
A20M [Disabled]
Intel Speedstep Tech [Disabled]
Intel Turbo Mode Tech [Disabled]
Intel C-STATE Tech [Disabled]

100% stable running LinX 0.5.5.1, max temp (84C/85C/78C/78C), playing games, watching Blu Ray movies etc.

[Splave]

System Info:

i7 920 @ 4.01ghz (Batch 3837A728), GB-EX58-Extreme motherboard (f5c BIOS), OCZ Platinum DDR3 1600 RAM, GTZ w/black ice 3x120

Settings:

CPU Ratio: 21x
BCLK: 191
DRAM: 1548 mhz
UCLK: 3247 mhz
QPI: 3438 MTs
HT: On
Uncore Multi: x17
Memory Multi: x8

BIOS Voltages:

CPU Voltage: 1.400v (1.376v cpu-z idle)
PLL Voltage: 1.80v
QPI Voltage: 1.375v
DRAM Voltage: 1.68v
All other voltages: Untouched

Notes:

Max temp 71c under linX testing 15 passes

[Avan]

Well looks like you beat me to this. I've been parsing the 80+ page i7 page for batch # info and what clocks/volts they got. I'm fairly close to be doing with it too. I'll probably finish it up tomorrow night and toss it up here anyway if people think it's worth having.

[JWMc]

100% stable running LinX 0.5.5.1, max temp (84C/85C/78C/78C), playing games, watching Blu Ray movies etc.[/IMG]

But not Prime blend? I have to raise my voltage up a bit for that (usually QPI voltage also) vs LinX testing. I bet the system would be stable 99% of the time if you are LinX stable though.

Edit: I found out I was using just too little memory with LinX to test properly. I had issues with it not loading the system fully because I was telling it to use too much memory. I just need to keep making it re-sync with what is available and use that as long as it's > 13000 problem size with my 4 gigs memory. I actually needed a single step bump for LinX stability for my current OC target because my voltage was still sagging a bit only under LinX. The single step voltage bump kept the load voltage where it was on Prime blend for 11 hours and it was then fine on LinX with the proper memory usage. I will post settings.

[Hot'n'Chilly]

Well looks like you beat me to this. I've been parsing the 80+ page i7 page for batch # info and what clocks/volts they got. I'm fairly close to be doing with it too. I'll probably finish it up tomorrow night and toss it up here anyway if people think it's worth having.

Fore sure, anything you can add will only help.

[strange|ife]

pinned

[16floz470ml]

System Info:

i7 920 @ 4ghz (Batch 3841A383), Intel DX58SO motherboard (bios date 12/18/2008), mixed assortment of 6gb Crucial Ballistix DDR3 1333 RAM, True Ultra 120 air cooler

Bios Settings:

Host Clock Freq (mhz) = 182
Static CPU Voltage Override = 1.2125
Dynamic Cpu Voltage Offset (mv) = 0
Enhanced Power Slope = No Slope
Multiplier = 22
Maximum non turbo multiplier = 20
CPU Idle State = High Performance
Intel Turbo Boost Tech = Enabled
CPU VR Current Limit Override = Enable
Uncore Multiplier = 16
Memory Multiplier = 8
Memory Voltage = 1.66
QPI/Uncore Voltage Override = 1.3
Dimm Reference Voltage Training = Auto
IOH Core Voltage Override = 1.15
Speedstep = Enabled
CPU C State = Disabled
QPI Power Management = Enable
C1E = Enable
Everything else = Auto

Notes:

Max temp 82c under Prime95 testing. Prime stable for 6 hours. Inside of p180 case.

[Avan]

Fore sure, anything you can add will only help.

As promised.

http://www.xtremesystems.org/forums/...7&postcount=35

[Hot'n'Chilly]

A W E S O M E work there! Many thanks.

[JWMc]

Thanks for compiling that data Avan. Unfortunately my data for 3.8ghz is wrong as I was still working on the OC and being bad and posting early out of excitement. I needed one more bump in voltage because I was testing with LinX improperly. My problem size was too small by about 3000. Here are my complete settings:

http://www.xtremesystems.org/forums/...postcount=1273

[Avan]

Thanks for compiling that data Avan. Unfortunately my data for 3.8ghz is wrong as I was still working on the OC and being bad and posting early out of excitement. I needed one more bump in voltage because I was testing with LinX improperly. My problem size was too small by about 3000. Here are my complete settings:

http://www.xtremesystems.org/forums/...postcount=1273

Okay, I'll grab the info from this thread and the batch # thread and update the list tonight when I get home. I don't have the compiled list here at work or I'd do it now.

[Hot'n'Chilly]

I'm still going over the info, will start testing soon. Keep the numbers coming though... more couldn't hurt.

[STi489]

Nice thread...Still working on mine can't wait for the 965 asus p6t owners to chime in!

I'm at 4.2 but still working on it...


Vcore- 1.375
pll-auto
QPI-1.375
IOH-1.20
DRAM -1.60

This 32m wasen't that good because i had abunch of stuff running in back ground...it's usually 8.

[systemviper]

System Info:

i7 920 @ 4.01ghz (Batch 3837A728), GB-EX58-Extreme motherboard (f5c BIOS), OCZ Platinum DDR3 1600 RAM, GTZ w/black ice 3x120

Settings:

CPU Ratio: 21x
BCLK: 191
DRAM: 1548 mhz
UCLK: 3247 mhz
QPI: 3438 MTs
HT: On
Uncore Multi: x17
Memory Multi: x8

BIOS Voltages:

CPU Voltage: 1.400v (1.376v cpu-z idle)
PLL Voltage: 1.80v
QPI Voltage: 1.375v
DRAM Voltage: 1.68v
All other voltages: Untouched

Notes:

Max temp 71c under linX testing 15 passes

i have the same batch and board, i'll give your settings a try, just loaded the OS vista 64 and have it good running stock~

[dengyong]

Batch 3838B079

[Envy]

Batch # 3837B194


i7 920 @ 4.20ghz, EX58-Extreme, Patriot Viper DDR3 1600 RAM, w/c by GTZ, 2x120 MCR220


CPU Vcore 1.4125v in bios, 1.376v idle, 1.36v load
QPI/VTT Voltage 1.375v
CPU PLL 1.86v
DRAM 1.66v
PCIE 1.5v
QPI PLL 1.14v
IOH Core 1.16v
ICH I/O 1.58v
ICH Core 1.14v

No cpu related voltages set to auto.

100% stable, not one crash, freeze or BSOD during 100's of various bench runs and 50hrs of gaming.

just got my cpu mob and ram, went straight with ReverendMaynard settings turbo and HT on and is working just fine. im using 3xCorsair Dominator TR3X3G1600C8D instead. didnt bench yet waiting to complete my liquidcooling,

[Hot'n'Chilly]

Nice job everybody. Just wanted to give a quick update and let you all know I'm still thumbing through all the data. Its just been slow as I've been quite busy with work lately. Thx again

[JWMc]

Another tasty one for ya, stable @ 1.3125v load @ 3.990ghz (190x21), 6GB, 8 threads!:

http://img218.imageshack.us/my.php?i...12vht6grf0.jpg

EasyTune6 shows the BIOS settings.

[beast200]

Hi
920 batch 3835A766
Gigabyte UD5
watercooled with EK Supreme (Original fuzion 1 fed up waiting)

temps
idle 39 to 42

Load 69 to 72

here are my setting
21x 200 = 4200


CPU Ratio: 21x
BCLK: 200
DRAM: 1600 mhz
UCLK: 3400 mhz
QPI: 3600 MTs
HT: Off
Uncore Multi: x17
Memory Multi: x8

BIOS Voltages:

CPU Voltage: 1.425v
PLL Voltage: 1.88v
QPI Voltage: 1.375v
DRAM Voltage: 1.66v
All other voltages: Auto

[286SX]

Nice job everybody. Just wanted to give a quick update and let you all know I'm still thumbing through all the data. Its just been slow as I've been quite busy with work lately. Thx again

No worries. Thanks for the effort. My P6T post is here:

http://www.xtremesystems.org/forums/...postcount=2464

HIGHEST STABLE OC - 4.0 Ghz @ 1.3125v Prime95 blend stable for 11+ hours. QPIv = 1.225v. DRAMv = 1.6v. Everything else set on Auto. Max temps are 93/92/89/87.

I have been trying increments of 1 BCLK, but so far everything is crapping out in prime. Sometimes 2 hours, sometimes 10 minutes...

-td

[JWMc]

Hi
920 batch 3835A766
Gigabyte UD5
watercooled with EK Supreme (Original fuzion 1 fed up waiting)

temps
idle 39 to 42

Load 69 to 72

here are my setting
21x 200 = 4200


CPU Ratio: 21x
BCLK: 200
DRAM: 1600 mhz
UCLK: 3400 mhz
QPI: 3600 MTs
HT: Off
Uncore Multi: x17
Memory Multi: x8

BIOS Voltages:

CPU Voltage: 1.425v
PLL Voltage: 1.88v
QPI Voltage: 1.375v
DRAM Voltage: 1.66v
All other voltages: Auto

I'm curious what the ambient temperature was for those readings, fan models (and rpm)/radiator(s) used, and the orientation of your EK-Supreme.

I hit 89C in an 18C ambient @ 4.2ghz on a TRUE. I'm hitting 89C in a 25C ambient @ only 3.990 ghz. I'm still planning my first WC loop.