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Old 04-02-2007, 01:42 AM   #49
dinos22
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

By eva2000
Really have no idea why it runs so cool. It's the perfect air/water type cpu I've been looking for.. not that this cpu won't get it's 15mins of fame on Kayl Black FrozenSS in the near future

Wonder if coretemp label for this cpu has anything to do with it - Mobile Intel Core 2 Extreme X6800 ?
ROFL mobile CPU heheh
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Old 04-02-2007, 02:44 AM   #50
eva2000
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

Yeah who knows -> http://forums.overclockers.com.au/sh...d.php?t=546051

Anyway, at higher vcore above 1.6125v the initial pencil modded of drooping resistor from 80ohm to 37ohm resistance wasn't enough to prevent further vdroop. So whipped out the 2B pencil and dropped resistance down to 14.5 ohm. And now it's all good at least from bios perspective

Final outcome



Improvements after vdroop pencil mod are amazing! Before the mod, 10x 400FSB = 4000Mhz would need 1.7v max vcore set in bios for 1.62v idle and 1.59v load. I could pass single Super Pi 32M but Systool dual 32M Pi would reboot at 50-80% mark - Systool dual 32M Pi is a good indicator of whether a setting is capable of dual Super Pi 32M.. Now with vdroop pencil mod, with vcore set to 1.65v in bios I get 1.616-1.624v idle and 1.624v load and now capable of Systool dual 32M Pi

Idle


Systool dual 32M Pi load



Last edited by eva2000; 04-02-2007 at 03:23 AM.
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Old 04-02-2007, 10:29 AM   #51
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

That pencil mod rocks!
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Old 04-02-2007, 02:37 PM   #52
dinos22
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

that's it

*makes a huge mess in kid's room looking for any pencils lying about
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Old 04-02-2007, 07:19 PM   #53
eva2000
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

Yeah dinos, I highly recommend you dig up a pencil

Dual 32M @ 4000Mhz - 10x400FSB at 1.625v bios (1.592v)


Prior to doing the Vdroop pencil mod, my X6800 L627A872 cpu could pass single Super Pi 32M at 1.7v maxed vcore in bios (1.62v idle/1.59v load) but dual Super Pi 32M would reboot. Now with Vdroop pencil mod I can do Super Pi dual 32M at just 1.625v bios set (1.592v - 1.600v idle/load)!

Decided to do the full photo shoot of the event with the following applications opened as well:
  • 4x Cpuz windows
  • 1x coretemp
  • 1x Asus PC Probe2
  • 1x Asus AI Suite
  • 1x Memset
  • 1x Windows Task Manager window

You can see up to iteration #10 dual Super Pi 32M times were similar for each instance, but core0 (Super Pi on the right of screen) started to run slower probably due to all the applications opened as well. As you can see vcore reported didn't budge much and for some reason my X6800 L627A872 runs very cool - about 14-22C cooler than my E6600 B1 Step 5 ES cpus

Click image for larger photo.











Dual Super Pi 32M - idle before start



Dual Super Pi 32M - completed

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Old 04-02-2007, 10:55 PM   #54
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

So how has Vdroop pencil mod helped max single Super Pi 32M clocks ?

Before Vdroop pencil mod
- max single Super Pi 32M = 4069Mhz at 1.7v bios set (1.62v/1.59v load)

After Vdroop pencil mod
- max single Super Pi 32M = 4080Mhz at 1.65v bios set (1.62v idle/load)
- max single Super Pi 32M = 4091Mhz at 1.675v bios set (1.65v idle/load)





Note room temps have dropped from 27-31C to 24-28C! So maybe that helped along with more steady vcore under load
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Old 04-02-2007, 11:22 PM   #55
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

so we need a 2b pencil eva200, keep the benches coming
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Old 04-02-2007, 11:50 PM   #56
JAFFA
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Re: Intel Core 2 Extreme X6800 B2 + P5B Deluxe

By eva2000
Note room temps have dropped from 27-31C to 24-28C! So maybe that helped along with more steady vcore under load

Yeah fluctuations in ambient do make it hard to really know one way or the other, but none the less it does seem to be an obvious improvement there. Great work as usual.
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