i7 920 - Core Temps - First O/C so please be gentle!

Flying Anorak

Flying Anorak

Flying Anorak

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Hi All,

Just finished building my new i7 rig and I've had a go at my first proper O/C following an article in a recent well known specialist PC magazine showing you how to do so!

I have a standard 2.66GHz i7 920 DO processor in an Asus P6TD Deluxe Motherboard and 6GB of Corsair RAM all housed within a TJ107 case. The cooler is the Titan NK857 - basically exactly the same components as the mag article although this is a coincidence!

At stock speeds the temp stays below 50 degrees C which I understand is good even when running Prime95. However, when I try and O/C this following the article exactly, it seems stable at 3.8GHz however the core temps are circa 87 - 90 degrees (and in Orange too!) which I understand is too hot. I've lowered the O/C and I can get it stable at 3.66GHz but the temps then (with the fan RPM's increased manually) running Prime top out at circa 82 degrees C.

Any ideas?

As per the article I upped the V core voltage to 2.75v whereas others on here say they can get 3.8GHz+ at stock voltages? Would this voltage increase have a bearing on the temp, should I try lowering it back to stock?

The CPU cooler is mounted correctly (AFAIK) and I used Arctic Silver as my TIM so am I doing something wrong or have I maybe just got a CPU that doesn't O/C so well?

Any ideas appreciated as I've spent a small fortune on this with a view to getting 3.8GHz and to be honest, I'm a little disenchanted with the whole O/C process right now!

Cheers,
 
what vcore are you using exactly!?!

you should be able to get to 4ghz around 1.3v, some need slightly more and some need slightly less. You want to keep your load temps under 85c, i personally don't like going over 75c as its still a 45nm chip.

The voltage increase will have a dramatic increase in temps.

Did you follow the directions on Artic Silvers website?
 
I hope the 2.75 vcore is a typo! Most 920 d0's will do 4ghz on 1.3v or less I got lucky and need 1.208v for mine. Is your CPU voltage set manually?
 
If you lower the CPU voltage any more does it become unstable? If so then you could try reseating your heatsink and reapply the compound checking how well the last lot spread when you take it off.
 
I think auto would give around 1.4v I think, it always volts way too much.

I've got the asus rampage extreme 2, so you should have the same options in the bios that I have.

This is my bios config for a 100% stable overclock to 3.6ghz, I've since pushed it further to 4ghz.

To get to 4ghz, I just changed the BCLK frequency to 191 (the ram frequency should change automatically when you adjust the BCLK), vcore to 1.34v and turned on Speedstep. This is with a CO chip, so you could get away with a lower vcore.

My idle temps are around 40c, maxing out at around 75c, maybe there is something different in my config to yours, so this may help you if you use it as a reference.

Hope it helps.


Ai Overclock Tuner: Manual
OC From CPU Level Up: Auto
OC From Memory Level Up: Auto
CPU Ratio Setting: 20.0

CPU Configuration:

CPU Ratio Setting: 20.0
C1E Support: Disbled
Hardware Prefetcher: Enabled
Adjacent Cache Line Prefetch: Enabled
Intel (R) Virtualization Tech: Disabled
CPU TM Function: Disabled
Execute Disable Bit: Enabled
Intel (R) HT Technologhy: Enabled
Active Processor Cores: ALL
A20M: Disabled
Intel (R) C-STATE Tech: Disabled

BCLK Frequency: 180
PCIE Frequency: 100
DRAM Frequency: DDR3-1443MHz
UCLK Frequency: Auto
QPI Link Data Rate: Auto

DRAM Timing Control:

CAS Latency: 8
RAS to CAS Delay: 8
RAS PRE Time: 8
RAS ACT Time: 24
DRAM Timing Mode: 2N

EPU II Phase Control: Full Phase
Load-Line Calibration: Auto
CPU Differential Amplitude: Auto
Extreme OV: Disabled
CPU Voltage: 1.30000
CPU PLL Voltage: 1.81592
QPI/DRAM Core Voltage: 1.36875
IOH Voltage: 1.31216
IOH PCIE Voltage: Auto
ICH Voltage: 1.31216
ICH PCIE Voltage: Auto
DRAM Bus Voltage: 1.64356

Debug Mode: String
Keyboard TweakIt Control: Disabled

CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew: Auto
IOH Clcok Skew: Auto
 
Forgot to add that your memory may be different to mine, so adjust the timings to suit your memory.

Also make a save of your profile, just in case mine is incompatible with your hardware.
 
Vcore seems ok (running the same myself, max temp on any core, 76c). Check the mounting of the cooler and make sure the cpu fan is running higher when temps rise.
 
For comparrison my 920 d0 needs 1.1375v in bios for 3.8ghz, voltage needed shoots up rapdily around 3.9/4ghz. I'd try dropping your vcore to 1.15v at 3.6ghz and test again. I can post some bios screenshots after work tonight if you like.
 
Glad to hear your temps are under control. I only use 4ghz+ for benching as the power usage starts to go up rapidly as does the noise from my pwm fans. For most of the time i use 3.8ghz as it requires a lot less juice and I don't notice any difference in performance as it equates to 1 or 2 fps or a few more seconds encoding. I'll post my bios screens later, they may help you tweak a bit more.
 
Here we go, these are my bios settings for 4ghz on a p6t v2 bios 0610, ram at 8-8-8-24. Loadline calibration Enabled everything else is auto.

4ghzbios.jpg


which gives this in windows
4ghzcpuz.jpg


Hope that helps you tweak a bit further :)
 
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