:shrug:Quote:
Originally Posted by ceemic
http://i40.tinypic.com/2ryq43m.jpg
Printable View
:shrug:Quote:
Originally Posted by ceemic
http://i40.tinypic.com/2ryq43m.jpg
Alright one more question. :p
Is it possible to overvolt and kill the memory on a 4870 from JUST doing the MVDDC and MVDDQ Pencil Mod here? I'm only wanting a slight increase in voltage.
Thanks again.
EDIT: Also, if I can get to 4.4Ghz effective stable on the memory, is there any chance of killing it just from the speed? I've heard stories of people's cards dying at 4.4Ghz.
^ yes pencil easily kills gddr.. mightier than the sword indeed
try 3.3k 1/4w resistor @ MVDDC and 3.3k 1/4w resistor @ MVDDQ and see how much you get out of that
Does anyone have screen shots of 4850's volt or pencil modded in crossfire?
1/2w is just able to handle more current then 1/4w, it isn't worse at all...
The current flowing through the feedback line is most likely in the µA range. That means that the 1/4W resistors will be just fine. To reach this limit of 250mW of power dissipation on the resistor itself, you'd need a very high voltage. ;)Quote:
Originally Posted by Barr3l Rid3r
P= 250mW
I= 20µA
=> U = P/I = 12500 V = 12.5 kV
Just as an example.
Now let's say we have a feedback voltage of 1.2V, it comes down to this power dissipation:
P = U*I= 1.2V * 20µA = 24µW
This might not be 100% accurate, but just to give you a clue. The actual current flowing through the feedback line could be explicitly stated in the corresponding data sheets.
And I didn't even take into account that the current is divided into two parts when connecting a resistor in parallel. ;)
Hi , i have the same cardQuote:
Originally Posted by gurusan
one idea for vmod?
Interesting software vmod here: http://www.ocxtreme.org/forumenus/showthread.php?t=4427
Mine are pencil modded till I get a better soldering iron. One card does quite a bit higher than the other right now, think the pencil wasn't as thick on one or I rubbed it off on accident :pQuote:
Originally Posted by drizzt5
I've had my 4870 at 1125 mem (4500) often for several days/nights at a time (usually idle at very long times) and I haven't had a problem yet. But unlike some people around here, I know better than to say that memory dying from speed is just a 'myth'...since I know first hand what it's like for Pentium 4's and Core 2's to degrade, even from just a slight voltage jump (while others will tell you that i'm lying or I should get out of the overclocking community and use a console instead (yes, people have been that harsh before).Quote:
Originally Posted by Gir92
I don't know -why- stuff degrades like this. I did see someone lose 200 mhz (!) on a very mildly overvoltaged E8x00 with just stress testing (prime/Intel burn test) at 1.32v....and it was well cooled...
And then others say their chips were highly voltaged with zero degradation...
Seems to me to be down to each individual card/cpu/memory sample I guess (except for those northwood P4's...a LARGE # of people had those things simply die or degrade).
Sorry I couldn't answer more satisfactory...
Is this working on the 4850?I think it works only on GT200Quote:
Originally Posted by CedricFP
My card was doing 850/1200 on stock volts no problem, and its taking 1.400 Vcore Load to get it to run at 875! Im testing stability now at 860/1200 in ATI tool, ill see how much i can get out of it. But it looks like more volts is doing very little on my card...
http://i87.photobucket.com/albums/k1...0/DSC_0459.jpg
The modding arena!
http://i87.photobucket.com/albums/k1...0/DSC_0470.jpg
Im not sure why I uploaded this
http://i87.photobucket.com/albums/k1...0/DSC_0474.jpg
Assorted board with lots of 10 turn pots!
http://i87.photobucket.com/albums/k1...0/DSC_0476.jpg
All done.
I soldered the other side of the pot onto a random pad for a cap that lead to ground as you can see. Nice and secure by itself, a dab of glue makes it solid.
Its running at 880/1200 right now, but its taking 1.48 Vcore to get it to be stable at that. Is that kinda high volts for the stock cooler?
EDIT: If I lower the ram down to 1100, the crysis FPS dosent go down, and it only takes 1.4 Vcore to be stable.... Hrm...
guess it just getting enough bandwidth and wants raw core/shader clocks higher :)Quote:
Originally Posted by ZOMGVTEK
once ram is @ 1000 gpu is not bottlnecked till its frequency reaches >1000 so just set the ram and forget it :)Quote:
Originally Posted by ZOMGVTEK
Hello DuncanOc!
I have the same video card Gigabyte hd4850/zalman
Please tell me if you identify what rezistor must pencil and were is the point
for measure final GPU voltage.:shrug:
We can't make software vmod with riva tuner because Ncp5392 controller
is not in database.:(
Gamer HUD help you to OC or is only marketing gadget.:down:
Man, here's the IC:http://www.xtremesystems.org/forums/...postcount=1390 but I dont have a DMM right now to identify which resistor to pencil.:(Maybe ceemic can help youQuote:
Originally Posted by dragubogdan
Sorry, I haven't been reading this thread a while. You have to find a place, where You can pencil FB to GND. It can be a SMD resistor or ceramic-cap.
If I give you a detalied schematics of controller(npc5392) pin 17 can you tell me what resistor or ceramic cap must pencil?Quote:
Originally Posted by ceemic
Dudes, do hardmodes, easier and more reliable :D
I like hardmode. If you know were must solder a trimmer res. I be glad!
Guys, I presume you'd be interested in this bit of info, so just a pointer to it..
It seems that it's possible to force 2D clocks for GDDR5 memory in BIOS after all, and AVOID the flickering issue.
http://forums.techpowerup.com/showth...19#post1191319
So far only one user reported it so it needs further confirmation, but he says that keeping 2D clocks for memory at 450MHz while 3D clocks are at 900MHz - there is no flickering, and temperatures/consumption in 2D is lowered.
I'm thinking that it's maybe 2:1 ratio so for those overclocking it could be that it's not 450 2D/1000 3D but 500MHz 2D/1000MHz 3D (I'm only talking about memory clocks here).
I'm just sending out the word for now, as I'm selling my card in 2 days and don't want to bother 8or risk) with flashing just before buyer arrives, but I'll probably test these once I get new card later next week (I hope).
Cya!
The pic has allready posted: http://i40.tinypic.com/2ryq43m.jpgQuote:
Originally Posted by dragubogdan
You can use one of the two points which are connected to pin17. Measure default resistance between FB and GND. Then multiply the number with 20 and that is the VR You can use.
hd4870x2 or the single?Quote:
Originally Posted by SNiiPE_DoGG
so once the gpu core is above the ram frequency the core is bottlenecked?
Got a DMM on the way, Haven't looked over this thread cos it'll take hours, but i have a Sapphire 4850 with Dual Slot cooler, non reference board.
Are there any pencil mod's for this card?
Hi all this is my first post on this great Forum!!!
I have a Sapphire 4850 Toxic
I have started by testing the stock core voltages and I have then done the Bios mod.
Now a few things are puzzling me.
The core voltage after the bois mod hits 1.27 Volts and the card will clock to 795 MHz
I thought the most the Bios would give was 1.21V at the card.
But the strange thing is the memory. The card has Samsung 0.8 ns chips which are clocked out of the box at 1100 MHz but the data sheet from Samsung quote they are 1200Mhz chips with a max voltage of 2.05 +/- 0.05
My memory voltage is 2.13v at stock and the chips won’t even do 1105 MHz without crashing?
Is there a way of getting the memory voltage down or do you think raising it up a bit more will help the chips clock higher.
Thanks.
Finally I was able to get an account with this webpage. Anyway I have a HIS IceQ4 4850 1gb version and I want to know where do I do the pencil mods for that card?! I read every single page on this forum and I only saw it being mentioned that someone had found out a way to do the vmod for my card. The person even put up the results of benchmarks but did not include any pictures of his/her card... Please help me!
Thank you Ceemic.Only one more thing is necessary:measure point vgpu.Quote:
Originally Posted by ceemic
If i get that i will start do work and came with results.
For the uninitiated, make sure to first set your VR to its highest resistance before adjusting it down to the desired level while monitoring the voltage. You do not want to start with the VR set to zero ohms.Quote:
Originally Posted by gurusan
Disclaimer: Using this mod will void your video card warranty and you alone shall be liable for any resulting damages. PERFORM THIS MOD AT YOUR OWN RISK AND DON'T TRY THIS IF YOU CAN'T AFFORD TO LOSE THE CARD!
http://img15.imageshack.us/img15/845...e4870vmod2.jpg
EDIT: Confirmed working mod with updated info provided by Vatos Locos :up:
awesome ^ syl :up: :up: thanks for the vcore mod
mines already 1.36vcore @ default
ill give it a shot in a minute.. but gotta find a way to increase gpu clock @ ccc
how about a vmem mod? :)
does up6206ak also regulate vmem?
hello guys, i have softmoded gpu and now i want to pencil mode gpu, i measured with DMM
http://img230.imageshack.us/img230/5879/projectdr9.jpg
here is pic, every time i pencil it voltge ram doesnet change :(
also i have maeasured MVDDC and MVDDQ different(1.66v and 1.55v) but are they need to be the same?
pencil or 5K vrs @ blue marked caps
id recommend 3.3K fixed resistors @ each
so i need to pencil mode yors blue marked and not that what i marked on pic for pencil mode??
yes
http://www.techpowerup.com/articles/...voltmods/153/3
if vr/resistor works so shall pencil :up:
just be careful.. pencil kills mem before anything else
CEEMIC, the circuit between FB and COMP is closed with no connection to GNDQuote:
Originally Posted by dragubogdan
Whatever the default resistance between FB and GND is 7.24Kohm mean i must use 145Kohm VR.
Here the circuit.
Attachment 94495
dragubogdan, FB is definitely connected to GND through some resistors.
100k VR works fine.
You're welcome! Have you try using TechPowerup's Radeon Bios Editor to raise the CCC's OverDrive limits? I've modified mine to allow GPU clocks up to 990MHz.Quote:
Originally Posted by NapalmV5
Vmem is usually controlled by a separate and less complex voltage regulator IC...I'll see if I can dig up some info when time allows.
thanks whenever you got time
i tried "change to these values" as soon as i got the card but no worky
what i mean by no worky.. after flash when driver loads @ os bootup the screen goes blank and artifacts badly shortly afterwards.. i didnt touch clocks/anything.. "change to these values" only change
my reference 4870 1gb sapphire did the same until i flashed it to the powercolor bios
btw i tried your vcore mod on my toxic 1gb and works great :up: just need vmem mod
i have new lower esr caps coming later in the week.. see how that goes
as for the vmem mod i didnt see any convincing vmem chip lol so ill take a closer look
i have tried pencil moding that but when i measured vddc and vddq they were still same??Quote:
Originally Posted by NapalmV5
what pencil you suggest to use??
^ #2
Quote:
Originally Posted by gurusan
Quote:
Originally Posted by syl
yeh those 2 ^ chips by the mem chips are both up6109 mvddc/mvddq
edit: found it: up6109 pdf
http://www.upi-semi.com/ProductFiles..._DataSheet.pdf
Thanks Napalm :up: Should be a simple matter of tracing out pin 6 for the mod.Quote:
Originally Posted by NapalmV5
connected both mvddc/mvddq (pin 3 to pin 6) with 22k resistor and now ~1.88vmem up .3 from 1.58
havent tried any other resistance so id say its safe to say a 100k vr to start with
it be nice to have solder points on the back of the card though
Thanks for all the info syl
ceeemic , is not working;i solder to the first resistor from FB a VR 100K to GND.Quote:
Originally Posted by ceemic
card not even start and i set the VR to 100k before connect.
dragubogdan, can You show a picture from Your mod?
The first pic is from Duncanoc , i just put my card in caseQuote:
Originally Posted by ceemic
Attachment 94555
and this is vr but no wire , i just remouve it
Attachment 94556
i hope is clear , if not tell me and do more pics
Which pins from VR You used?
Did You check that this point was directly connected to FB pin?
first pin (our look) is unused ,midle pin is conected to GND and last pin i used to go to FB
yes i checked with DMM and have 00.4 ohm on scale 200ohm between FB pin and that resistance
I dont understand what go wrong
a ,VR was turned to maximum(99k)
I would have used that first pin and middle one, so resistance drops (=Vgpu increases) when turned clockwise.
Pretty strange tho...
Another Pic
Attachment 94557
Yes I understand, how You soldered it.
So You turned it to the end in clockwise?
When i touched the wire coming from FB to VR actually have 99k between FB and GND and must nothing happened(only when start turns VR) , but the card is shut down like a protection thing
yes i turned it to the end in clockwise.
No one wanna help me out with the HIS Iceq4 4850 1gb?
any idea ceemic?
dragubogdan, I don't know; it's pretty strange...
Try bigger VR?
its me mario, please post macro-pictures from PMW area and IC.
Thanks for helping me out, really appreciate it!
So I took these pics with a 8 year old camera thats worth about 3 bucks now. It took 46 tries to get a couple decent pics:mad:
Anyway here ya go!:welcome:
http://s680.photobucket.com/albums/vv166/IR0BI/
I think the last pic is the best btw.
I've been through the last 10-15 pages and have been googling my ass off, anybody got a vmod for the Sapphire HD4850 dual slot thingie? I need it badly, and fast, if there is one already, if there isn't I'll cancel my order.
EDIT: Or am I right when I think this is the 4850 mod: http://www.xtremesystems.org/forums/...postcount=1006 ? It could be the 4870 as well, I don't have any Sapphire cards in front of me right now, so I can't tell really. Appreciate some help on this. :)
its me mario, it should be pin13 to GND. First trace where it heads to find a good soldering point. Measure default resistance between pin13 and GND.
Mean Machine, it should have that most common IC (uP62....) so it's easy to do Vmod...
Great, thanks for the answer. I'm worthless at finding vmods myself, I'll have to start looking in to that. :)
A Sapphire HD4850 Dual-slot version ordered.
I just moved so I don't have a soldering iron. Any temporary pencil mods I could do?Quote:
Originally Posted by ceemic
thanks for the help!
With the pencil mod for the non reference sapphire 4870 the vcore went from 1.32 to 1.34 lol
Look at this bull sh*t!
http://www.evga.com/articles/00462/default.asp?gvt=1
me r mad:mad:
I can't seem to find the UP6201BQ datasheet anywhere, if anyone could tell me where I'd need to solder the resistor I'd be grateful.
Mean Machine, yes I know this datasheet can't be found. But it is basically the same as NX2420: http://ceemic.pri.ee/hardware/datasheets/NX2420.pdf
So pin13 is FB.
This mod works great on the EAH4830 as well, since it shares the same PCB. Thanks!Quote:
Originally Posted by ceemic
--Matt
mattkosem, nice to know :)
Thanks!Quote:
Originally Posted by ceemic
Just my last idiot question then, before I actually can start feeling like I've thought something right for the first time; just pin 13 to ground with a 100k VR and from there it's the regular stuff?
Sorry, I've just never had to think of Vmodding, since I usually don't really care about the graphics cards. :)
Mean Machine, measure default resistance before moding! The resistance may vary through different layouts.
Of course, of course. I just took the 100k as an example as it's "default". :)Quote:
Originally Posted by ceemic
Big thanks for all the answers.
EDIT: Resitance between pin 13 and ground is 5.8kOhm, should anybody be interested.
Then 100k VR works fine :)
Where do you guys find your VR's?
Depends on your country. I myself buy mine from ELFA, which seems to be available in northern europe as a whole.
Guys, I just wanted to say: THIS THREAD IS AMAZING!!!! :D
Thanks to you all, I've just successfully modded both my HD4850s, and they are currently running 770Mhz core @ 1.26v! :shocked::shocked: These were cards that would not even do 660Mhz stable @ stock!
I guess there should be more left to push, so I'm hoping for an 800Mhz, 24/7 setup. I can't believe that 10bucks worth of equipment can make these cards run faster than an HD4870! Both in 3dmark 2006 (22423 points) and Vantage (14914 points) I've currently got the highest scoring system for a Q9550 with 2x HD4850. I had no idea about how to do this mod, but as I have quite some soldering experience, I figured I should give it a go. Thanks to the clear instructions from this thread, there were no mistakes made and as I am watercooling them with a full-cover block, the cards' temps never exceed 45C (for the top card) and 49C for the bottom. :up::up:
Here's a pic of my mod:
http://i449.photobucket.com/albums/q...e/DSCF5975.jpg
And the cooling:
http://i449.photobucket.com/albums/q...e/DSCF5976.jpg
Is it around 1.30v what most people have needed to get their HD4850 to ~800Mhz?
Oh and my Vantage screenshot:
http://i449.photobucket.com/albums/q...9144250mhz.jpg
.. dont know if its the right thread...
but this app should interrest everyone who is able to read german.
http://www.awardfabrik.de/forum/showthread.php?t=5707
its not permanent -> after reboot the voltage is still @ default.
happy testing
ciao
Thats a pretty nifty tool imma have to admit! Is it not limited to the same limits as modding the Bios though? If not, then this would really be an ideal piece of code for pushing those GPUs!Quote:
Originally Posted by mister
NO limit ! u can push GPU Voltage up to 1,99V :eek:Quote:
Originally Posted by les_paulde
maxibition says that in post #163 ...
no doubt that cant be healthy:D
but a member testet sucessfully 1,3v on a 4870 @888mhz gpu score
see link below
http://www.forum-3dcenter.org/vbulle...01&postcount=4
I personally wouldn't mind seeing a picture of a DMM showing the coinciding voltage with whats set in the program though, sorry to be skeptical. It's just that I trust a DMM more than any software monitoring tools, especially at the higher ranges... Wasn't 1.3v still within BIOS range on the HD4870 anyways?
Nice find though man, I'm sure a lot of people will want to try this out!
software isnt exact at all..
and to be skeptical is much better then skrew up your cards :up:
nothing beats a professional mm - no doubt.
i even read a post that this mod wont fit with 4850s cause they are not equiped with digital mosfets !
so if your gfx got uP6201BQ voltage Regulators... forgot it.
back to the 4870s - another poster got sucessfully 920 mhz core clock , but i dont know the voltage.
reaad post #37
Sapphire HD4870 512MB Ref. Layout
Programm > Multimeter
1.25 > 1.258
1.30 > 1.309
1.35 > 1.360
1.40 > 1.411 :eek:
1.45 > 1.463 double :eek:
770MHz at 1.26V is... Impressive. I'm having a hard time getting 790MHz at 1.42V with my dual slot Sapphire. Oh, and yes, I managed to mod it successfully. :)
EDIT: Seems it just goes on and on ever since I got above 1.4V, 815MHz seems fine so far. Just testing though, the only requirement is 3DMark06.
Just got my 1GB HIS card under water and got one of those Zalman VRM coolers. It works VERY well, VRM load temps around 50ish and idle 30C!
A bit annoyed that this card has crappy Hynix memory. Which manufacturers use better stuff?
http://img10.imageshack.us/img10/2568/img4024.jpg
I'm not exactly sure, but isn't Qimonda the best GDDR5?
Seems the blue Sapphire 4850 is utter crap, I could do 800MHz flat, but 830 didn't work no matter what I fed it with (which was up to 1.58V under a accelero twin turbo). Yes, I'm aware that those kinds of voltages are prone to kill the hardware, but I just wasn't bothered with keeping it alive.
My reference (old) Sapphire 4850 is better though, running 3DM06 at 800MHz with 1.3V right now (just thought I'd start there, haven't tried any less voltage).
I had a blue 512mb Sapphire once with the analogue vrm circuit and it did 850mhz stock voltage under water....my red Sapphire with digital voltage reg circuit did 875mhz stock voltage though....not found another 4870 that clocks nearly as well :(
Just thought I'd add my results in here. (By the way, that Awardfabrik program does NOT work on ALL 4850s)
I have a pair of Asus 4850's that come up in GPU-z as "Prerelease" which I don't know why this is the case, but they are pretty early cards I guess.
Testing each one individually, aircooled with Thermaltake DuOrb.
Vgpu under load is 1.29v, my max 3d06 runs last night were at 875 on both cards with the same 1.29v.
Max in 3d01 Nature (my quick "does it bench" test) was 900 core on one card, and 895 on the other. I was surprised when I read the voltage (with a DMM) and kept cranking the core up 25mhz at a time and it just kept staying stable! Fun cards :)
http://www.techpowerup.com/gpuz/6zpv3/
Hey there,
i got this card yesterday:
http://www.abload.de/image.php?img=dsc02565uall.jpg
i think its a rev 2 pcs+. But the vgpu measure points that were posted here do not apply to me somehow. If looking on the back of the card, i have 1,3v reading on the right points to ground, on the left points as stated in this post
http://www.xtremesystems.org/forums/...postcount=1317
i do not get any readouts...
now my pronlem is: unfortunately, voltages do not alter in powerplay mode (if i measure on the right hand points), nor can i adjust them in bios. Someone has experience with this card? Its a powercolor 4870 pcs+ 1GB, obviously with analoque pwm section...
Hahahaha, I love these HD4850s! Managed to push them both to 880/1050 last night (1,48v), and now have the highest scoring 2x HD4850 CF system on HWBot with 3DMark Vantage:
http://hwbot.org/result.do?resultId=825097 :shocked::up:
This gives me a nice 3rd place on the overall rankings and the first two users have 3 and 4 HD4850s respectively so makes sense I guess! :rolleyes:
Whats the limit people have been pushing these cards on Vcore for benching purposes? My EK waterblocks are keeping both cards under 50C load (gpu, mem and mosfets!) so temperature shouldnt be an issue...
Thanks!
Just tried this mod on my card, voltage goes up to 1.365V (stock was 1,33). But it won't go any higher, adjusting the value of the VR has no effect at all. Do you have the same problem or are you able go higher?Quote:
Originally Posted by syl
I'm max'ed out at about 1.37V as well. To go higher, you will probably need to change the VID limit by switching the positions of the VID resistors.Quote:
Originally Posted by Dafut
will i with pencil mode raise mvddq and mvddc(at least that is shown with picture at techpowerup)?
so if i all get it clear i need to reduce resistance of r713 and r913 versistor??
stock resistance(i measured with DMM) is 220ohm each, for how much i need to reduce it??
i will pencilmod 4870
Quote:
Originally Posted by Mean Machine
Same here. Sapphire Dualslot 4850. Cant get over 800 Mhz regardless of v-core. That sucks!! I wonder if they have locked it somehow? Or maybe they are just to crappy to handle higher speeds?
Anyone who managed to get past 800 with these?
i need some help brothers :p
i understand VDDC for the 4870 is the Vgpu mod
and MVDDC is for the Vmem mod
but what about the MVDDQ ? i cant find out what it dose :p
and i really want to know.. i'am waiting one sapphire 4870 tomorrow an when i will fined the max clocks on stock voltage i'am going to mod it so i need to know what the MVDDQ stands for...
thanks :p
MVDDQ (VDDQ) is the 'chipset voltage' of a GPU (as compared to a motherboard).
Some claims that raising this improves the OC of both the core and the memory. Vddq had to be raised together with the Vddc to have any effect. Vddq was a 'big thing' back in the 9800 pro/xt days. Haven't seen it used since then. It had only a slight impact even on the 9800 cards.
Don't bother, I managed to kill two 9800 cards - both likely by playing with the vddq.
What do you guys consider as safe vcore on air? Accelero + 14cm fan (1000rpm), max temps 62 all "cores", just core / memory IO is 72C while running 3D06. Got my 4850@1.35V - pencil moded
vDDQ is the operating voltage of the memory IC's I/O buffer, basically the voltage the memory bus works on. And as such it also affects the GPU.Quote:
Originally Posted by roger_h99.nor
mvDDC is the voltage the memory cell runs at.
hello. sorry for my bad english but I'm italian. :D
I've seen that someone has overvolted the sapphire dual slot 512MB. Have you a guide or other for this card?
isn't the pcb different from the one in the image at the beginning of the post?
thank you,
Mat
I've sold my card, and I can't remember exactly which point is the mod point,but two of the points next to each other in the red area are the same point, and that's the mod point. 100k VR to GND worked just fine, even though the card isn't worth modding imho.
http://bandwidth.se/thumbs/14588.jpg
i'm looking for powercolor/club3d eadeon 4830 vmod(pensil or soft)
thanks