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I7 Overlock

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March 24, 2009 7:43:28 AM

How far can i get the i7920 to overclock to on air?

Using the Xigmatek Dark Knight in a NZXT Tempest case. Running on a Corsair TX750W.

More about : overlock

March 24, 2009 7:57:08 AM

4.3ghz done right

whats really cool is this is a system i am working on - so while its running stablity tests - i am typing this and making photos!!! THAT IS STABLITY!
HERE IS A PHOTO OF WHAT I JUST POSTED! WHILE ITS RUNNING STABLITY TEST

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March 24, 2009 8:07:53 AM

is that a xigmatek dark knight? doesnt look like one...
March 24, 2009 9:41:46 AM

I loved the first post, no explanation just a picture now that is style. Anyway the best I could do on air was 3.8 Ghz, anything higher game me some pretty nasty temps. Though to be fair I would never be satisfied with the temps dragon is getting, <65c or its unstable in my book. On water I can take it up to 4.4 Ghz so it does overclock well, but you wont see a difference between 3.8 and 4.4 anyway.

Edit: Wow hitting 69c on the core without all of them at max load! That is not good bro, at 100% my temps keep climbing about 5-8c!
March 24, 2009 9:50:15 AM

Looks like a S-1284, Dark Knight is black with 3 heat pipes from what I remember.
Also, is that the K from a Killer NIC on the top of it? Sure looks like it...
March 24, 2009 11:05:24 AM

built a core i7 for my bro used a £50 heat sink cant remeber the exact name but was on air with an asus p6t motherbaord got it to 3.6 Ghz no worries after prime 95 it reaches 54c max and idel is around 25-30c i prefer to keep temps low. also intel revomends keeping the voltage at 1.25v or below so 3.6 Ghz was the max i could hit while staying stable and not exceeding this

if you where to go above 1.25v and not worry bout temps so much im sure u could hit the 4 Ghz mark likr the first post, though id not recomend it

theres no reason why u really need to go above around 3.3ghz plus if u burn this baby up in a year or 2 its a lot of wasted money

id suggest taking it to 3.2 Ghz for the first year then maybe 3.4-3.6 after that then after 4 years take the CPU as high as it can go when :p 
a b à CPUs
March 24, 2009 10:14:42 PM

I believe even the fanbois over at AMDZone got their i920 up to 4.0GHz on air recently :) . Of course they were actually 'reviewing' the Asus P6T mobo, but still...

BTW, the cooler they used was the Zalman 9700, which some people here on Tom's pooh-poohed as being overpriced and mediocre. Since I have one, my opinion differs naturally :p 
March 25, 2009 4:13:47 AM

Definitely is not a xigmatek S1284 lol i got one in my casing and i'm staring at it lol
100% not S1284
But anyway i'm using a i7 920@3.7GHz at 1.29vcore idle temps around 39~41 and my room temp is around 29~33°c
I haven't try to go pass the 130W limit yet, didn't need so much power at the moment hehe
March 25, 2009 9:39:22 AM

The problem with overclocking i7 is that there is a point where it needs more voltage, and not just a bit more but a lot. To hit 4.2 up to 4.4 Ghz I went from v1.325 (3.9) to v1.525.
March 25, 2009 12:46:18 PM

At 4.0 ghz I'm at 71c after running prime 95 for 30 hours. Idle my temps are 33-34c. I'm cooling my system with the antec 1200 case & thermal ultra 120 extreme 1366 with artic silver 5.
March 23, 2010 7:08:35 AM

Per a request I am posting the DO settings for asus P6T 1201 bios, with air cooling (update settings) - air cooled systems now run 10-20c cooler with the new 1201 bios and the D0 cpu.

100% stability:

1.4v 195blk with an asus p6t running 1201 bios - cpu temps 75-81c HT-off
gpu: ati 5870
ram settings 9-9-9-10

running: 3dmark06. prime 95, avg simultaneously

3dmark06 @4.1ghz afv on spysweeper on but no running 25.5-26.1k (26,000)

running at 8-8-8-24 at 1.64v semi stable but not recommended.

cooling dual fan set up - xigmteck black knight dual fan set up with sealed fans, sealed around the gaps, stock intacke fan and a 1800rpm 12cm led Li fan

recommend settings -totally ran dependant
cpu 1.33 to 1.42v
ram 1.64v 9-9-9-30 to 8-8-8-24 this is the deciding factor
ATI gpu set to overclocking by stock ati feature

XFX heat pipe 5870 runs 40-70c at max oc, while running prime 95, in the antec 1200 case temps at the end of 3dmark (run over and run) 65-72c) with a 72-74 f room temp. photo below (shipping photo for insurance):

http://i63.photobucket.com/albums/h138/4rothrocks/wsz-x...


4.2-4.4ghz is possible with water cooling but no recommended with air cooling, the same as was seen with the 975 and 965 chips.

WHY I POSTED THIS INFO, I WAS ASKED AND I SEND PEOPLE TO THIS SITE!

D0 with Ht turned off results in a 10-20c drop in temps. 40-50C AVERAGE TEMPS WITH 75-80C AT MAX, WITH MUTLIPLE PROGRAMS.

i will return to THG soon, thank you for your support and too all my detractors thank you too!

thank you THG you guys are the best, i will return to answer many questions and help out those who need info on building the "worlds fasteste air cooled computers!" such as i have done and sold since 2003. I will never post any false data, everything i have posted over the years has almost always, with very very few exceptions been dead on!

THG rocks! it is the best computer site in the world!


ovclocking info:

4.09 ghz at 8-8-8-24 @ 195blk and ~1600mhz is semi stable w/patriot mid level and muskin (1333 8-8-8 or 1600 9-9-9)

asus P6t 1201 bios leave all settings to auto, accept ram volatage (1.64v), cpu voltage (1.38v average), latencies .. tune system for latencies. yes you can tune for blk too, but at 4.1ghz you are reaching about the max where the power management will decrease stablity.

what to try: 9-8-9-30 to 8-8-9-24 latecy
cpu vltage is not that important with HT off, blk 195-205 really over 200 is ifi with the 920 and below 1.45v.


DO NOT GO OVER 1.45V, LONG TERM KEEP THE SYSTEM BELOW 1.41V

I HAVE POSTED AUGUST OF 2007, THESE SAME SPEEDS AND VOLTAGES FOR YEARS - Q6600 AT 3.6GHZ AT 1.45V
http://www.tomshardware.com/forum/244351-28-61ghz-1ghz

JUST AS I POSTED THE XIG COOLER - MARCH OF 1008
http://www.tomshardware.com/forum/250728-28-xigmateck-t...

There is a physcial barrier at 4ghz, we sold 4.1ghz systems in 2003. The voltage of a cpu, while dependant on the material, is also been fixed at 1.45v.

before hf doping 1.5-1.52v was ok for core 2 and older, now with i7 and Hf doped cpus since 45nm die size for intel, voltage sould be keep below 1.41 or 1.38.


In 8 years we have never had one cpu failure. I hope this infor helps, i did this quick it is late and i will come back and post more soon. thx!

thank you THG your the best!





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