Help me overclock to 4ghz with i7-950

UPDATE!
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I got stable at 4.2. Maxes at 80 degrees with prime95.
CPU volt 1.325v
QPI volt 1.25v
RAM Volt 1.64v
RAM timings 6-8-6-20



Thanks guys for your help!

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I got to 4ghz stable. I'm trying to get to 4.2ghz stable now. Any help would be appreciated! Thanks!


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I am trying to overclock my new i7-950.
Here is my current set up.

Proccesor: Intel i7-950 d0 Batch # 3012A804
Cpu-cooler: Corsair H70 (2 stock fans and stock thermal)
Memory: G Skill PI 3X2GB CL6 Timing: 6-8-6-20
Motherboard: Asus P6X58D Premium
Videocard: EVGA 470 GTX Superclocked
PSU: Antec TruePower New Series TP-750
Enclosure: Antec Nine Hundred 2
HDD: Seagate 750GB 7200rpm

I was able to get 3.8 ghz stable with these settings at 80 degrees max with HT OFF. If HT ON, it hit 90 degrees and I had to stop and let it cool down.
I used the information from Clunk to overclock the CPU.
http://www.clunk.org.uk/forums/overc...beginners.html

Ai Overclock Tuner - Manual
CPU Ratio Setting - 21
Intel (R) SpeedStep (TM) Tech - Enabled
Intel (R) Turbo Mode Tech - Enabled
BCLK Frequency - 181
PCIE Fequency - 100
DRAM Frequency - DDR3 - 1451MHz

DRAM CAS# Latency - 6 DRAM Clock
DRAM RAS# to CAS# Delay - 8 DRAM Clock
DRAM RAS# PRE Time - 6 DRAM Clock
DRAM RAS# ACT Time - 20 DRAM Clock

CPU Voltage 1.20000v
CPU PLL Voltage - Auto
QPI/DRAM Voltage - Auto
IOH Voltage - Auto
IOH PCIE Voltage - Auto
ICH Voltage - Auto
ICH Voltage - Auto

DRAM Bus Voltage - 1.64v
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 - Auto
IOH Clock Skew - Auto
PCIE Spread Spectrum - Auto

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

Screenshot after Prime95


According to another member from OC he was able to get 4.0 using these settings (http://www.overclock.net/intel-cpus/...locking-3.html).


Ai Overclock Tuner........... = X.M.P.
Profile #1-8-8-8-24
CPU Ratio Setting............ = [21.0]
Xtreme Phase Full Power Mode. = [Enabled]
BCLK Frequency............... = [191]
PCIE Frequency............... = [100]
DRAM Frequency............... = [1528 Mhz]
UCLK Frequency............... = [32**]
QPI Link Data Rate........... = [Auto]

CPU Voltage Control.......... = [Manual]
CPU Voltage.................. = [1.30000]
CPU PLL Voltage.............. = [1.80]
QPI/DRAM Core Voltage........ = [1.35000]
IOH Voltage.................. = [1.2]
IOH PCIE Voltage............. = [Auto]
ICH Voltage.................. = [Auto]
ICH PCIE Voltage............. = [Auto]
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... = [800mv]
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.............. = [Disabled]
Execute Disable Bit.......... = [Enabled]
Intel(r) HT Technology....... = [Enabled]
Active Processor Cores....... = [All]
A20M......................... = [Enabled]
Intel(r) SpeedStep(tm) Tech.. = [Disabled]
Intel(r) C-STATE Tech........ = [Disabled]


When I tried this, my computer wouldn't boot. Do I had need to add more cpu voltage? Do I keep QPI at "cpu voltage"+.05? We have the same set up except that he has a Corsair RAM and Western Digital HDD. Any advice on how I can get it to 4ghz?
Edited by jay05 - 12/13/10 at 9:51am

Normal temp with the H70 at default (3.07ghz) settings is 36/29/34/30 degrees. My room is around 68 degrees.

Do you think it would make a difference if I increased the Multiplier and decreased the BCLK? Does that have any affect on temps? I can try to lower the voltage at 3.8ghz but I'm not sure how that's going to help getting it to 4.0 ghz. :S My arctic silver is arriving tomorrow so I will try to reseat the H70 and see how that works out. Is the stock thermal on the H70 not good?
Edited by jay05 - 11/18/10 at 4:32pm

What RAM are you using. From that guide from Clunks, the RAM they use is an OCZ ddr 3 1600 but the timing is 7 7 7 but the person writing the guide set it at 8 8 8 24. Do you think this has anything to do with it? My G Skill RAM has a timing of 6 8 6 20 which is what I manually set my timings to.

Do you see people going to 4ghz with mid 70s or 3.8ghz?

I'm thinking it's my H70. I RMAed the first one because it was making a fish tank noise non stop from the pump. I hope this one doesn't have a problem either. My Arctic Silver 5 is suppose to be here tomorrow so we'll see what happens when I reseat the H70.