@ Niccolò & Clint: Can you say something about the difference in power consumption ?
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@ Niccolò & Clint: Can you say something about the difference in power consumption ?
If I shade that part, is there any way to know what the change in voltage is without a voltmeter?
Are there any applications that can tell me?
Thanks
Mayk-Freak:
Can you post your BIOS settings ?
hej everyone.
sucsessfully vmodded my card, have it running @ 1039 MHz and my temps are at 55C, just wondering how far i can go. my volt-meter reads 1.710 during load. thats quite hi, ain't it? what is the max you think...
nobody really knows, maybe you can be the first!!! tell us when it dies and we will set ours .001 v below that :rofl: :ROTF: . seriously though I can do 999 with 1.62 maybe you should lower it some and see if it can still hit the 1039 as before. and what are you using to test?Quote:
Originally Posted by ohno
I would buy one multimeter ifI were you, a cheap insurance;)Quote:
Originally Posted by RealyPssd
But to answer your question;
I have had a really hard time to shade it down to 1.0 kOhm with a 4B pencil that is very soft, and that has given me 1.415 volts 3D.
I now bench @ 958/1250 no problems, this core scales like a dream :up:
So if you go nuts on the shading I doubt you will get more than 1.45 volts out of it anyway, and that is pretty safe even on the stock coooler.
Intersting, sounds like you'll have to shade multiple resistors in order to go higher on the vcore, like how you would pencil mod a 8600GTS.Quote:
Originally Posted by Clint
How are the temps on the 3870 after the pencil mod?
After adding 0.83 volts I get a temp raise around 6-7C to 58C on the stock cooler running @ 100%.Quote:
Originally Posted by HousERaT
I can also confirm that the voltmod works. 3870 VCore now at 1.42 after using a #2 pencil. :up:
what image did you used for gpu pencil mod?Quote:
Originally Posted by HousERaT
http://img249.imageshack.us/img249/6679/dscn2700xp3.jpgQuote:
Originally Posted by PPInDaHouse
This i guess ;)
no, that's for 3850 card, I want for 3870 :)
btw I can run Nature at 1428mhz on rams without any mod, stockcooled :D
but core only 900 :(
Clint, HousERaT and i can confirm that it also works for the 3870.Quote:
Originally Posted by PPInDaHouse
I managed to get it to 1.49v, Core@958.5 for gaming and 985 3Dmark06
had a hard time shading it though using a 3B pencil
Here's my pencil mod results on my HIS 3850 512 MB IceQ3 Turbo.
__ohm Volt MaxMHz Temp
2.26K 1.31V 826 MHz 48
1.38K 1.36V 850 MHz 51
1.45K 1.39V 876 MHz 53
1.13K 1.44V 904 MHz 56
Penciling in 1.13Kohm was not easy.
Scales pretty linearly across the board. Stable in 3DMark06 and AtiTool artifact tester.
I also slapped on a different fan onto the original heatsink, an 80 CFM Delta 80mm @ 70%. Brought down the temps by about 7 degrees on average.
Excellent!Quote:
Originally Posted by Rumon
I'm down at 1.0kOhm...was a real hassle to get it that low, you must have gotten it down to 700-800Ohm or so..:up:
Care to explain the method of shading, did you do circles around the resistor or some other technique?
I've A GeCube 3850 512MB Turbo 3 Card with an AC S1 and dual 92mm fansQuote:
Originally Posted by Niccolò
the ressistor is 2.44 kohm on my card default and i measured a vcore of 1.26V
this is a pic of my card
http://img155.imageshack.us/img155/6...0markedfc4.jpg
green marked are my measured vcore points
blue is the ressistor i penciled
if i penciled it down to arround 2.00 kohm or 1.8 kohm my measured vcore is lower than default
(around 2kohm it was 1.18volt)
do i measure the vcore on wrong points?
it seams that this is the wrong resistor but my layout is a little bit different what resistor i've to use?
what to do with this card help...
i get 780Mhz gpu clock my card need more vcore :(
http://img149.imageshack.us/img149/5293/pencil1ay2.jpg
i penciled the black marked resistor
it was 2.43 default
i penciled it to 2.22 what gave me 1.40 volt
when i pencil it to 2.19 it give me 1.44 volt
it seems a verry good ressistor for a huge voltage range
i get with my gecube 3850 turbo 3 850Mhz@1.40 volt
but i cant get 864 stable...is it the bios bug?
try overclocking the mem and see what happens
so the resistor to shade on HD3870 is the first below:
R1222
R685
R684
that have a black point in the middle?
thanks in advance for the info :)
even at default memclock (900mhz) i get artifacts with ati tool @864MhzQuote:
Originally Posted by KainXS
when i set the GPU to 850Mhz (there is nothing possible between 850 and 864) i get no artifacts even if the mem is clocked at 1060
i mean 850 is not bad for a 3850 but default 3870 can reach it easiely but not more because of the bios bug
I cut the tip of the pencil flat, large enough to cover the resistor.Quote:
Originally Posted by Clint
Then put pressure and dragged it across.
llll
llll --->
llll
I could put a bit of pressure since it was a soft pencil and it simply crushed if it was too hard. I tried it loads of times before i got it to 0.42
If it dose not work on the first 2-3 passes wipe it and try again.
I tried the circular 8 method but that tend to rub it off if you put just too much or too little pressure
(I managed to get 0.38 > 1.45v but was not getting stable expected clocks most likely due to uneven spread)
hope it helps
Quote:
Originally Posted by Menhir
did you flash the unlocked bios for the 512MB 3850
Which would I shade on my 3870?Quote:
Originally Posted by Menhir
The one circled in black or blue..?
Also, it doesn't matter whether or not a multimeter is analogue or digital does it?
Thanks
can someone help here :)Quote:
Originally Posted by PPInDaHouse
Yes if your board layout is the same its the first resistor below those numbers you mentionedQuote:
Originally Posted by PPInDaHouse
i just used the pencil mod on the r1222 resistor marked blue on both my 3870's and have no improvement at all.... i used a hb pencil and completely covered the top of the resistor... anyone got any ideas... should i take them out and pencil mod the resistor marked in black???????
any advice appreciated....
hi i have the 3870 club3d when i use other bios the performance is bad in 3dmark, and when i use the orginal than i can go only core 850 mhz ,
can i or can someone modify my bios 4 unlock it ??
i try all the mod bios all the same i can only use the orginal bios 4 good performance
3dmar03 72K@CF 850Mhz Core, and when i use other modbios@1000 Mhz core i get onky 53K with CF
i need unlocked Orginal bios and also need more mhz above 900 Mhz core
i do the Vmod but i cant go above 850 Mhz core
best regard
http://www.abload.de/img/03_72k1x3.jpg
Withe Original and Unlocked bios i get this score
cant be done... original bios has a differant hex file... you must use the unlocked version.... i have a thread about it here http://www.xtremesystems.org/forums/...d.php?t=168407
theres a link to the best performing bios around..... have fun....
Best way to is to use a Multimeter to measure the resistance after you have done the pencil mod.Quote:
Originally Posted by purecain
First time i tried the pencil mod it simply didn't work and the resistance was the same. you will need to get the resistance down to at least 1/1.10KOhms to notice an improvement.
by re-applying i assume.... am i right? and have i used the pencil mod on the correct transister.. the blue one from the pic... thankyou for you expertise in this matter... i actually dont own a multimeter... i'm ordering one online as we speak.. which is the best to buy... is there a make of multimeter which is known as being the best or will any do... thankyou...
i would appreciate advice on which to buy from this site... money is no consideration... http://www.ni.com/digitalmultimeters...ity=multimeter
Yes your right if it didn't work i reapplied and tried again and the blue one marked on the picture dose seem to be the one that works on the 3870 also.
As for a DMM. I don't know any brand or what is the best as i am just using a bog standard one i bought for back in my electronics course in collage
still works great its something like this.
DMM
(my current ones something along the line of that $20 one)
Also i had a hard time using a HB pencil try something along the line of 2b/3b/4b
Quote:
Originally Posted by purecain
hi i try already the bios from the site but no good 4 my club3 i think that the timings alre not good maybe :confused:
thanks for that m8:up: .... got one on order... i'll redo the pencil mod aswell...
Update:Quote:
Originally Posted by Rick Hunter
After a day, the pencil mod wore off a little bit. I redid the pencil mod with the aforementioned technique (over the top of the resistor). Here are the new results:
__ohm Volt MaxMHz Temp
1.13K 1.44V 904 MHz 56
1.19K 1.43V 891 MHz 56
0.99K 1.46V 918 MHz 56
0.99K 1.46V 918 MHz 49 (delta @ 100%)
Ambient temp is about 23-24 degrees.
is that really for the 3850, I tried shading that on my 3850 256MB and its not working, anybody got an ideaQuote:
Originally Posted by VoRtAn_MaDgE
Wore off? So when applying this mod, one has to redo it quite often or what?Quote:
Originally Posted by Rick Hunter
Not if done properly heh. I was initially using a thin-tipped cartridge pencil and was going around the resistor many times. Later, I found a regular 2H pencil, wiped the previous application and went over the top of the resistor. I remeasured it today and the resistance was the same.Quote:
Originally Posted by Wallboy
Well, then how long would this 2H pencil mod last? LOL... How do you measure the voltages if the measuring points are so far inside of your case? My case is so full of hard drives and cables that completely block any access for me to that area! Any ideas or suggestions for me?Quote:
Originally Posted by Rick Hunter
do someone vmem on hd3870 ?? howmuch vmem can i give ??
:) It should last longer than a day if done properly that's for sure. I've got just enough room in my case for the multimeter probes to touch the vGPU measuring points. It's not that easy and one really needs a steady hand while measuring the vGPU. You could always simply measure the resistance each time you try to do the pencil mod and compare that to what my results (or anyone else's) are. Granted, it's less accurate but might be a better alternative than blindly sticking two metal probes onto a running video card. :P I wouldn't go below 1.0 kohm (which usually increases vGPU by about 0.10V to 0.14V) unless you've got modded cooling.Quote:
Originally Posted by Bo_Fox
Hey guys,
here is a pencil MOD for the HD3870/3850 you can check. On my Club3D HD3850 this is 100% functional. The best is, there is no resistor so it is easy to clean. With 4,38-4,40 Ohm I got 1,4 - 1,41 VCore.
http://www.computerbase.de/forum/sho...d.php?t=357301
Its in German, but I think pictures says more than words ;)
Demo
I can't get my GeCube 3850 512mb X-Turbo III over 850MHz on gpu :( it has 1.46V at 850MHz everything is just fine little bit over crash, is it bios limitation ?
quick question, in the first post for the vcore mod it has 2 pot values, what vcore roughly does the 100k ohm put to the vgpu at max value?
Thanks! Can you at least translate the pictures? Seriously, I don't understand a single german word :(Quote:
Originally Posted by demolitionman1
I´ll test it in a few days :)
think this hardmod is working great :D
http://www.hardware.info/images/user...s/002352-8.jpg
nice, what volts and cooling? and did you do the mem mod too or just the gpu?
would appreciate someone explaining those pictures just posted of the new pencil mod. I assume to connect the yellow points with pencil for the 3850...but what is with the blue points? one being the screw...
vgpu 1.52vQuote:
Originally Posted by toddm27
cooling: innovatek 7800gtx waterblock's (have 2 cards)
only the vgpu, it look's like vmem has a advantage on that too....i could never reach 1400 until now.
i think :Quote:
Originally Posted by STaRGaZeR
yellow >> pencil
Blue/Red >> measuring points
do you have the HD3850 bios Fixed or original bios ???Quote:
Originally Posted by Greg_1
regards
So it is! Yellow is pencil. Blue is measuring point for OHM. Red is measuring point for Voltage.Quote:
Originally Posted by mascaras
I got the newest bios for my card, and it's fine. Now I can get even 890 :) but it's unstable :(Quote:
Originally Posted by mascaras
max stable for 1.45V I got 880MHz
btw. is the score 19k for 3850 512mb 880/1080 and E6300@3.2GHz on Vista 32-bit and 7.11 cat is ok ?
So you pencil the yellow part in the NEW pictures and not the blue part circled in the OLD pictures that were posted here?
Just Tested the new Pencil Mod and it works great its easier to apply :up:
Here is a image for anyone that is confused about the Pencil mods
http://img205.imageshack.us/img205/4...pmodsl4.th.png
The Mod is exactly the same for the 3850 the only difference is the
Resistance measuring point. Its the Right Blue Square and the Screw Above 'Q1252/Q1612/Q1602'
Top left Corner of the image
best ground is the pins on the power plug. i push the dmm in one of the ground holes and it holds it for me. BTW the ground ones are the farthest from the board. the ones closest to the board are positive.Quote:
Originally Posted by Mastericy
I have a 3850. Whats the benefit if this volt mod if Im using stock cooler? = None?
I used mine on stock cooler with rivatuner adjusting fan speeds and it went to 850 on 1.4 v which maxxed the temps at 69c with fan at 60 %. crysis for about an hour.Quote:
Originally Posted by sniper007
Thanks for that pic Rumon.
What Vcore is quite safe for 3850 ? now I have ~1.45V but I want more
In that one you pencil the same spot as i did to ground and it didn't work for me ...Quote:
Originally Posted by Rumon
Quote:
Originally Posted by Norway
I don't get it -- I can't get a pencil mod to work on my 3850. My analog multimeter is a little unreliable, but that still shouldn't stop a voltage increase. So, according to this mod, I'm supposed to be able to draw a tiny line of graphite across those two points and get a resistance decrease enough to dramatically increase voltage?? I don't really see how -- I've never done a pencil mod, but it doesn't seem a number 2 pencil is doing much when I'm attempting to put down some graphite on such a tiny spot.
Maybe someone can enlighten me with specific details of application technique of the actual mod as oppose to just showing pictures of the location. How do you apply the pencil, did you shave the tip to be a tiny flat point or did you leave it like a standard pencil??
Thanks.
And where the heck is the new Atitool, it would be nice to have new voltage control and monitoring..
pdiggs, not a tiny line, keep grinding on that resistor with a 2B, or just move the pencil a bit with a 4B, you should get good results.
I tried it with a 2B, but had to keep grinding a lot just to get to 1.4v, and if you grind too much and find a lot of small particles everywhere, you have to blow it away to get constant voltage, or it will fluctuate.
+1 Vote for a reading voltages & resistance(especially resistance) How-To on these cards. Basics. I have to send my card back...its now apparently fryed.
Example of the mod
http://82.173.172.10/Rol-Co/3870vmod.JPG
and some results.
http://82.173.172.10/Rol-Co/200383.JPG
http://82.173.172.10/Rol-Co/200530.JPG
2005 need more cpu power to get a decent score :(
Couldn't you please try to test Crysis with/without the overclock? I'd like to know if it boosts Crysis's performance :).
P.S.: Great clock, good job :up: .
For some reason I usually measure about .2V difference between the 2 marked vGPU points.
For example I measure 1.6v at the Black point and 1.41 at the green point.
Which is the real vGPU? At stock without any mods the black point says 1.45v (!!!) and the green one says 1.27v
BTW I have a Powercolor 3850pro 512mb
http://img88.imageshack.us/img88/2171/img2953jk5tx2.jpg
I would say the black would be closer to the truth. could you get a little further back so we could see more of the card, there may be a better place to check.
but 1.45v stock? also when it's at stock I have a 780mhz limit on my clock....that would be terrible for 1.45v
and ok I'll have upload a better pic in a bit....doing some 3dmark runs
What would be the safe temperature on the Voltage regulators on the 3850 ?? I changed the stock cooling ,put some decent radiators there ,and in FUR i got about 60-65 degrees on that spot(finger-measured ).Is it ok?
[IMG]http://img228.imageshack.us/img228/3...2987tn3rq1.jpg[/IMG]
let us know what the readings are. one or all of the points should be a read point.
scores 20020 in 2005 and 12216 in 2006 3DMarks on 3850 512mb@877/1090 and E6300@3400 are ok ?
Cat 7.11 WinXP SP2
Thanks so much jimmyz!
I currently have it pencil-modded so it won't show 1.27v...but it was as I suspected.
The black point I was measuring first is the incorrect vGPU and displays a few 10ths of a volt higher than the actual vGPU. The green circled point and almost all of the other points you showed me display my vGPU.
1.54v idle and 1.57v full load. Have it 100% stable @ 958.5core/1098mem
Temps are around 39-40c load under water with a MCW60A.
thanks again! :D
Now, has anyone figured out a vGDDR mod? This mem already does 1098 which is great, but it would be even better if I could just squeeze a bit more out of it...something like 1150-1200 :)
I was trying to read resistance from the 'measurement point' next to the new pencil mod...machine restarted and I have blue lines. Beautiful. RMA time, huh?
RMA a card you fried on your own because you don't know what you're doing? Real classy......... :down:
When you decide to mod a card you assume responsibility. you killed the card, now be mature about it.
never measure resistance with power to the card.
Indeed, i chipped off a resistor, and lost hope of ever getting the card up and running again, and i actually put it with the old computer stuff that i don't use, never thinking of RMAing it, although, i could easily glue that resistor back, and it will never look like it was tampered with.
Then i took out again, and tried that VR thing, and it worked, now, can you guys look into the thread i made, and tell me how much resistance is that resistor i circled yellow.
Thanks.
Nice done Norway. Is far as I can see that is a 3870, right?
I am about to do the exact same thing as you have done and I was wondering if you can take 2 more shots with your camera for us.
One that shows a more close-up of the red cable-end from the CORE mod.
The soldering point in the middle of the card.
And please another close-up of the IC that you soldered the two pink cables to.
What kind of adjustable resistor did you use? Is they both 100Kohm with 15 turns?
Thank you very much!
Klimpen from Sweden!
***EDIT***
How come you connected the pink cable from the CORE pot to the IC? Isn't it supposed to be connected to GROUND?
As Rumon shows in THIS PICTURE.
You are getting med confused. As far as i know you connect a resistor between a specific spot and ground.
But I'm no scientist so please correct me and prove me wrong :up:
It doesn't matter what spot the VR is grounded, as long as it is on ground plane...Quote:
Originally Posted by Klimpen
for the new pencil mod here
http://img205.imageshack.us/my.php?i...870pmodsl4.png
what if u did both points with a higher ohm than on one of the points only so that it would be easier to shade in
the Vdimm mod is tha same for HD3850 ? how many kΩ for the pot ?
i made the Vmod first with 50k pot 25 turns and i got ~ 1,4Volts so i used one more in series an got +0.01 Volt @ 100K from stock of 3850 Vga
just like Norway did with the Vcore mod and it works fine :) with 1,55V i can bench @ 1Ghz Core :)
RightQuote:
Originally Posted by Klimpen
I'll do it littlebit alterQuote:
I am about to do the exact same thing as you have done and I was wondering if you can take 2 more shots with your camera for us.
500Kohm 20 turns from elfa.seQuote:
What kind of adjustable resistor did you use? Is they both 100Kohm with 15 turns?
type 89P
The pin that i use on the IC is the IC's grounding ...Quote:
How come you connected the pink cable from the CORE pot to the IC? Isn't it supposed to be connected to GROUND?
The old solder that was there didn't even melt on 480C so the soldering dosen't look that good but it does its job ;)
core:
http://img146.imageshack.us/img146/6...0045su5.th.jpg
IC:
http://img183.imageshack.us/img183/2...0046pr0.th.jpg
Has anyone discovered a vDIMM pencil mod for the 3850?
Where at least can I measure the stock vDIMM?
I just measured these points and they all read 2.10 volts. Is this the vDIMM?
http://img247.imageshack.us/img247/6...2987tn3ej9.jpg
stock Vdimm is 1,9Volts have you tryied to see whits resistor ends on the leg oh the Vdimm ic ?Quote:
Originally Posted by gurusan
Mine is 2v vdimm stock. I brougth it to 2.2v but could reach only 1050Mhz on mem. I was hoping for more. Those who made this mod had the same experience?Quote:
Originally Posted by Vatos_locos
Niccolò I haven't done the Vgpu yet but when i was searching for an unlocked Bios for my 3850 i saw this
on stock bios my mem's could go up to 2400Mhz DDR
with the Bios i am using now i can go only up to 1000Mhz DDR
try with 2,3 Volts if you can go further :)
2400 with ddr3 seems a lot. It looks like impossible.
If you're looking for an unlocked bios for the 512mb version i can give you mine that doesn't have the 864 block.
Look http://img98.imageshack.us/img98/852...2500vi7.th.jpg
nope i could go up to 2394Mhz with the locked Bios
i have Bios now and i have the 256Mb Card so i could go with more Mhz on the ram's
http://www.hwbot.org/signature.img?i...27&thumb=false
You could reach this with stock voltage? If yes, that's awesome. I tryed but of course it crashed.
yheap i could reach those speeds with stock voltage but with the original Bios Only when i changed with one unlocked the core speed could go farther but the mem's could go only up to 1050Mhz ( 2100 DDR ) but you should try to get more Mhz for the core and then from the mem ;)
with the unlocked Bios the card Vmoded ( only the core not the mems ) i can go up to this i need a bios tuner to flash the card with the same bios but higher clock speed couse riva tuner the core speed selection ends at 1005Mhz ( 999Mhz on gpu z )
http://www.hwbot.org/signature.img?i...35&thumb=false
I make my card pencil mod and now vgpu is 1.489V, i just run 3dmark06 core 985Mhz and mem 1278Mhz.
Card cooled HR-03/R600+ Adda 120mm. idle temp 40*c AND LOAD 6h atitool torture 53*C, core 930/mem 1280
http://service.futuremark.com/compare?3dm06=4485045
I can do 2430Mhz on mem om my 8800GTX with just 2,24v and that is GDDR3 ....Quote:
Originally Posted by Niccolò
Norway what volts and speeds did u get after the mem mod?
Havent have time to the speed yet but i can go very high with the volt, but haven't gone any higher then 1.95v and that was very hot, to hot on the stock copper cooler becuase it was cooler passive ....
Testet 1400Mhz with ATItool's 3Dcube and it was stabile there, my aim is 1500Mhz 24/7 when i get my fullcover waterblock (Aquacomputer), I guess 1.95v orginal cooler is possible with some activ cooling.
PS... didn't try to go any higher than 1400Mhz .....
I try pencil mod now I can run core 850 Mhz and mem 1143 Mhz on Stock Heatsink. but I can't go pass 860 Mhz
http://www.vmodtech.com/modules.php?...wtopic&t=22803
you need the unlocked bios to pass 860Mhz on core ;) and you could run your rams @ lower timings all 5's i thing (?) can the run there ?Quote:
Originally Posted by gigolo
If you have unlocked bios, can you upload the bios. Thank you very much!Quote:
Originally Posted by Vatos_locos
sure why not it's for 3850's 256Mb only be sure that you have 3850 with 256Mb Vram
use atiwinflash or atiflash to flash your card's bios
this one i'am using with one sapphire 3850 256Mb and i can go up to 1Ghz riva tuner cand go farther the card can go farther tho but we need a bios tuner with 38x0's support
Rivatuner can go far higher you just need to do some magic in the Power User thumbnail :P
You can also set ATItool to go higher .....