rlhc, try this !






source:here

This post has been edited by sukhoi37: Dec 4 2007, 08:14 PM

not me la.
check out the posted link.

how's the card's noise at that speed?

mind to tell us his full system specs?

hmm...dunno why my sapphire 3870 cant pass 880/1270, after sometimes of gaming(cod4) it will hang a while and the rivatuner fan speed (fixed at 60%) will change to auto. no artifacts though.

i'm using the bios in the first post :'Bios / OC hotfix'

my oc result is lousy la.
so i got nothing to show.
tried a few unlocked bios, not much different.

sapphire 3870 clockspeed: 870/1300

Run with some games after flashing, flash to lower clockspeed version if found artifacts.

rlhc17, can we clean the mod back to stock after modding?
how?
gonna try it at company, got multimeter there

need to run the card to check the resistance after modding?
where are the points to check resistance in your picture?
blue square point and ???

This post has been edited by sukhoi37: Dec 30 2007, 10:35 PM

can i just check the resistance only?
very hard to measure the Vgpu when the system is on, scary....

just pencil mod my 3870.
i mistakenly thought need to shade it from 5.12kohm to 1kohm.
the system cant boot up after i shade it to 3kohm.
luckily the card run fine after i wash the pencil shade away.
after that i tried to shade again.
3.9kohm, the Gvcore shows 1.7v....
i immediately shut down the system and did some clean up to the pencil mod point.
Gvcore is 1.49v, fan speed 70% temp fulload 63C, idle 59C.
i cant pass 940mhz in COD4 and 3dmark06.
no artifacts showed, but the screen freeze for few seconds then the rivatuner fan speed will change from fixed to auto.
sometimes the stupid ati vpu recovery will pop up.
never experience this in my previous GCs...

just pencil modded the vgpu to 1.54v
but i cant pass 950mhz core.
fan speed 100%, idle: 60C, load: 70C
ambient temperature 30C

it's quite dangerous to mod it without dmm.
I just bought a china brand dmm at rm45 only.
lousy?but i got the same reading with branded dmm(borrowed from company rm140).
rm50 for 100mhz boost...you judge the value.

This post has been edited by sukhoi37: Jan 5 2008, 10:53 PM

it's quite easy, shade the first pencil mod spot to 1kohm.
the default resistance should be 1.62kohm.
1kohm will give you 1.42 vcore.
it's better to check the vcore when you system is running in 3d mode.

how to check vcore:
black test probe put into any available psu molex connector ground (the black one is ground)
then use the red test probe to any red point (the left side row)showed in the picture.

it's not as dangerous as i expected actually.



Attached thumbnail(s)

would be fine if you dont' oc your the 3870s.

i checked with dmm in 2d and gaming mode, no difference...

nice.
what's the difference between pencil mod and hardmod in overclocking?
the pencil mod effect will last for how long?
the hardmod definitely will void the warranty right?

oo, i pencil mod to 1.54vgpu but still cant pass 950mhz.
your hardmod only for vgpu? or both include vmem?

wont work of what?
don't think there's oc issue because of pcie 2.0 cos i've seen many ppl with pcie 2.0 board oc it like mad.