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11-02-2008, 12:51 PM
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#1
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Xtreme Owner
Join Date: Jun 2002
Location: Las Vegas
Posts: 11,144
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Nehalem Overclocking @ XS
Intel I7 965 @ 5.247Ghz
Gigabyte X58 UD5
3 Stage cascade -100c
Corsair 2133 Dominator DDR3
Voltages
vcore ~1.5v, this is a "leaky" high IDV chip, scaling up with higher voltage is possible at a cost of runaway amp phenomena.
vmem ~2.2v for benching 2v on Vapo, compensate voltage with cooling to be safe.
vqpi ~1.35v depending on the board/bclock, upwards of 1.55v if I am pushing bclock, I run a low bclock so I usually leave it on stock.
vmem is the secret to uclk, 2.2v gets you 4.7Ghz ulck. uclk is also known as uncore.
general ratios
Stock QPI on i7 965 is x48 @ 133 bclock, if you raise the bclock to 160ish you would need to drop qpi ratio to X44 to continue raising the bclock to 180ish, drop qpi again to X36 again and that will get you out the theoretic max bclock of 220. That is not set in stone, some chips/board combos have exceeded these numbers but this rule is pretty close to what you will see on C stepping.
The uclk ratio I prefer to use is (the lowest possible) 1:2 of my ram speed (uclk runs at twice the speed of memory) and at lower speeds there are plenty more ratios to scale higher without running the sick memory speeds that I do, this is a huge gain in performance but for me it requires a lot of vmem and high end memory to run upwards of 2300Mhz (4700Mhz uclk) the memory controller has exceptional is its stability at this speed, I have not reached top speed and it will take even faster ram and more vmem to achieve that.
Runaway amp phenomena, I hook an amp meter to the four yellow wires on eight pin power cable that connects near the CPU. Watching this you will see that yes you can keep scaling up with more voltage but your chip has a limit with all cores loaded that it will runaway on amps till it crashes. I know exactly what range to stay in with cores loaded to know not to hit this runaway threshold. Keeping vcore down and disabling HT lets me run at the chips max speed, HT has an added power load on the CPU, disabling it helps gain critical Mhz.
Max Uncore and QPI, memory speed is correct, SPD 9-9-9-24
Last edited by FUGGER; 11-18-2008 at 11:03 PM.
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11-02-2008, 12:55 PM
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#2
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Xtreme Addict
Join Date: Aug 2006
Location: Oklahoma
Posts: 1,141
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Damn. you dont waste any time do you. 
__________________
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Q66@3.8ghz
Rampage/Maximus SE hybrid W/C. 4 gigs OCZ reapers.
Nano-cooled 4770,s CF 2x ST220 rads, single loop.
ST MCP 350 modded to 355 w/XSPC top.
Quote:
Originally Posted by Vapor
There's a lot less voodoo in watercooling than is assumed  |
The only thing future proof in electronics, is the electricity itself.
Any one who relies on only one source of information is a fool.
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11-02-2008, 12:56 PM
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#3
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Registered User
Join Date: Oct 2004
Location: Portugal
Posts: 50
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all i can say is: Wooooo!!!
__________________
EVGA X58; I7 920 C0; OCZ Reaper 1866 88824; Sapphire 5870; 1x SSD; 2xWD 1Tb GP + 1 Tb WD Black; X-FI Titanium; Corsair HX 620; Lian Li PC-50P
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11-02-2008, 12:59 PM
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#4
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Xtreme Addict
Join Date: Aug 2006
Location: Oklahoma
Posts: 1,141
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No signs of a coldbug i guess.?
__________________
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Q66@3.8ghz
Rampage/Maximus SE hybrid W/C. 4 gigs OCZ reapers.
Nano-cooled 4770,s CF 2x ST220 rads, single loop.
ST MCP 350 modded to 355 w/XSPC top.
Quote:
Originally Posted by Vapor
There's a lot less voodoo in watercooling than is assumed |
The only thing future proof in electronics, is the electricity itself.
Any one who relies on only one source of information is a fool.
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11-02-2008, 12:59 PM
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#5
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Champion
Join Date: Nov 2004
Location: Hungary
Posts: 1,062
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Thanks for sharing! 
__________________
"AMD gives me back the old/real overclocking feeling"
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11-02-2008, 01:01 PM
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#6
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Xtreme Addict
Join Date: Feb 2008
Location: London Ontario Canada
Posts: 1,142
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great job Fugger isnt that ram voltage high for a Nehalem based board? Good to see some results I do hope it can be pushed a little futher but maybe with a release of a newer stepping will show more potential That CPU voltage is really good for that clock wow this is a great job indeed, now lets hit 6ghz like the Qx9650
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11-02-2008, 01:01 PM
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#7
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Xtreme Member
Join Date: May 2007
Location: Corsica
Posts: 223
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nice clock
__________________
My records
WR-DDR2-805Mhz Dual channel
WR Q6600-5018.57mhz
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11-02-2008, 01:06 PM
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#8
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Xtreme Member
Join Date: Feb 2008
Posts: 111
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nice man
noticed you werent using too high of a bus freq, how far up were you able to get it before raising multi?
__________________
E8400 @ 4.8Ghz on Vapochill LS | NVIDIA 790i Ultra SLI | BFG GTX 280 SLI | PC Power & Cooling 1200W | Bench Sled
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11-02-2008, 01:12 PM
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#9
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Xtreme Owner
Join Date: Jun 2002
Location: Las Vegas
Posts: 11,144
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My ram voltage is fine for the temps, I can go up to 2.3v but not needed on the Samsung Rev E
Bus frequency (bclock) is maxed for top qpi speed, 162 I need to ratio down the qpi speed.
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11-02-2008, 01:12 PM
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#10
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Xtreme Addict
Join Date: Jul 2007
Location: ARIZONA
Posts: 1,559
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36 multi 
this is looken good 
kill it FUGGER
__________________
PENT E8400 batch #814A014 ...4.3 at 1.34v~4.7 at 1.45v
FOXCONN MARS
COOLIT Eliminator 7*c idle~27~38*c load $95bucks !
BUFFALO FireStix's ddr2-800 do 1200 eazy at 2.1v
OCZ 2x2 kit pc2 8500 - 1066 @1069 atm
Quattro 1000W
Radeon 2-4850's in crossfire
OCZ Vertex SSD thanks Tony!
ALL PIPED INTO HOUSE AIRCOND ;}
*QUANTUM FORCE* saaya & sham rocks !
*REAL TEMP*
At least you've got some Xtreme software now for working in Xtreme situations! "Unclewebb" rocks !
*MEMSET* Felix rocks !
*SUPER TEC MAN* UncleJimbo rocks !
OVERCLOCKERS MAG.. http://www.xtremesystems.org/forums/...d.php?t=197660
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11-02-2008, 01:21 PM
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#11
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Xtreme Addict
Join Date: Oct 2006
Posts: 1,064
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Nice stuff (FINALLY some numbers. thanks!), but do these CPUs hate voltage? I'm used to see 2v++ from the Intel benchers around
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11-02-2008, 01:23 PM
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#12
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Xtreme Enthusiast
Join Date: Apr 2005
Location: Germany, Bremen
Posts: 510
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Nice stuff Fugger!
Are the latencys right at the cpu-z validation?
Do you have a 32M-Run with 5Ghz or more?
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11-02-2008, 01:28 PM
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#13
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I am Xtreme
Join Date: Sep 2006
Posts: 7,717
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Boohaaa and we enter a new area of overclocking... jeez those bandwith numbers make me drool , would triple channel even be faster ?
__________________
Question : Why do some overclockers switch into d*ckmode when money is involved 
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11-02-2008, 01:30 PM
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#14
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Xtreme Cruncher
Join Date: Oct 2007
Location: Stuttgart, Germany
Posts: 5,452
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Way over 5Ghz and such a low Vcore.. damn nice. Makes me think around 4,8Ghz should be attainable 24/7 stable on phase. *goes away to check his credit cards*
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11-02-2008, 01:38 PM
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#15
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Xtreme Enthusiast
Join Date: Mar 2006
Posts: 552
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Nice!
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11-02-2008, 01:38 PM
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#16
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Xtreme X.I.P.
Join Date: May 2006
Location: Bangkok, Thailand
Posts: 1,157
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 WooooooT amazing clock Fugger
love max Uncore clk 4.45GHz
__________________
Sorry For My English 
OverclockZone Team
THAILAND 
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11-02-2008, 01:46 PM
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#17
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Registered User
Join Date: Sep 2008
Location: Germany
Posts: 23
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Damn this crappy  runs like hell!!!!!
How about more FSB for the lower ones, like i940?
Haven't u been able to get a higher one?
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11-02-2008, 01:50 PM
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#18
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Captain Jinx
Join Date: Dec 2003
Location: Acton, MA
Posts: 4,706
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Nice stuff, short and to the point with pure big numbers, the way it's meant to be done. 
You've been a busy guy Charles. 
__________________
Quote:
Originally Posted by FUGGER
I put on my shoes before I put on my pants.
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11-02-2008, 02:07 PM
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#19
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Xtreme Owner
Join Date: Jun 2002
Location: Las Vegas
Posts: 11,144
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Ive had time on the cascade to dial in and rerun stuff, anxiously waiting for others to post tonight and tomorrow with killer results.
Taking pics off the camera and Ill show insulation on three boards.
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11-02-2008, 02:09 PM
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#20
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Xtreme Enthusiast
Join Date: Apr 2005
Location: Germany, Bremen
Posts: 510
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Quote:
Originally Posted by FUGGER
and tomorrow with killer results.
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I'll be waiting!
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11-02-2008, 02:17 PM
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#21
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Banned
Join Date: May 2008
Location: vermont, yes i like women
Posts: 1,360
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sweet
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11-02-2008, 02:17 PM
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#22
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Banned
Join Date: Feb 2006
Location: Hhw
Posts: 4,116
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Omg and everyone was saying they would not oc close to 6ghz.. I'm pretty sure they will when you guys get the hang of it completetly
Why did you run 4 cores for sp1m? Wouldn't it go higher with fewer cores enabeld?
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11-02-2008, 02:33 PM
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#23
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OCTeamDenmark Staff
Join Date: May 2004
Location: OCTeamDenmark.Com :D
Posts: 2,344
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EVIL CPU !
Thats just SOOOOO FAST
__________________
OCTeamDenmark.com Staff
Cooled and sponsored by Coolerkit.dk
Gigabyte EP45 Extreme | QX9770
2x1 Gb G.skill DDR3 PC3-16000
2xFoxconn 3870, Vcore,Vmem,OCP,Cap mods.
22" Samsung 225BW | Antec 1000 Watt
Mach 2 GT (moddet by t!m) | MX510 - Func F10s
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11-02-2008, 02:46 PM
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#24
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Registered User
Join Date: Nov 2007
Location: Poland
Posts: 40
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Quote:
Originally Posted by FUGGER
Ive had time on the cascade to dial in and rerun stuff, anxiously waiting for others to post tonight and tomorrow with killer results.
Taking pics off the camera and Ill show insulation on three boards.
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I hope you've got some serious stuff coming :P
__________________
======================
all those lies suit you, they are custom made to drive you out of reality...
======================
1. A64 X2 3800+ E6 313x9@1,425V, DFI LP NF4 Ultra-D, Galaxy GF8500GE 256MB@918/2200/800, 2 GB G.Skill TCCD
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going for next DFI (DK P45 maybe :P)
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11-02-2008, 02:46 PM
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#25
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Xtreme Owner
Join Date: Jun 2002
Location: Las Vegas
Posts: 11,144
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More images added.
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