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Ok ceemic great i have found and MemV too look at pic ;) ;) ;)
PIC
@ 1,00kohms i have 1,16v
now litte pencil = 0,95kohms = 1,18v
great it works ;) now 775mhz stable 30 crysis loops
now next how much can i giv the Gpu 1,26v ??? or what you thinking.
and any idea where i can find pencil vmem resistor?
greetz ice
Ok my firend its done ;)
--> MSI HD 4830 OC-Edition (V153-001R ) @ 800MHz*1175MHz vMod 1,26v <--
look Valid: LINK
and Crysis 30 Loops rock stable:
http://www.bilder-hochladen.net/files/thumbs/5khm-g.jpg
Temps at GPU 55c and Mem bei 60c. becaus 10c + as Stock. And all with Stock Aricooler and without Ramcoolers ;)
Here vGPU Mod from CeeMic and ME:
http://www.bilder-hochladen.net/files/thumbs/5khm-h.jpg
Think is a amazing Overclocking for this cheap Card ;)
Also it must be worked on MSI 4850 Card with 4+1 Phases too i think.
Hope we can do an vMem Mod too ;)
greetz Ice and special special THX fly out for ceemic ;)
Just an update from me:
Powercolor 4830 now running 900Mhz on the core, up from 625 Mhz default.
1.5v hardmod, watercooling.
43'C load temps.
:D
Wondering what to limit core voltage to - they are 55nm, right? I usually figure default voltage + 20% is pretty 'safe'. The 45nm Core2's are generally considered safe at 1.45v, so I wonder if these 55nm chips would be OK to 1.6v...
You know I want to hit 1Ghz on this cheap card, although I don't think even 1.6v would do that - I'm seeing only about 30Mhz increase now with each 50mV... so that puts me around 950Mhz @ 1.6v...
I thought people were blowing their rv770s up with over 1.5ish? I dunno...I've never put mine over 1.41v and its still alive and kicking from release day
Hey man!Quote:
Originally Posted by gurusan
Well, I've put 1.6v through it for ***** and giggles. It managed another 30 Mhz to see 930Mhz artifact-free. It's deffo at the limit now - 30 Mhz from an additional 100mV is pretty poor.
I'm not going to use 1.6v every day -just for benches. I'm happy with 1.5v for everyday use.
930mhz is impressive
What do you guys consider as maximum safe overclock for 24/7 mode use with simple air cooling(reference 4850, Accelero S1, small heatspreader on MOSFET)? I mean voltage/frequency numbers.
Really want to know the suggestions from experienced users.
Hi guys!
Now I need some help.
The card is 4850 Golden Sample. Some dude wants to do Vmem mod.
He sent me this picture: http://ceemic.pri.ee/hardware/hd4850...850gs_vmem.jpg
The memory PWM controller is RT8105, but it's datasheet isn't available.
Has someone moded it?
If i had the card, I would come up with it, but I don't.
Can someone do some measurements? Which legs are GND and what resistance is between other legs -> GND?
My first "wild guess" would be leg 6 or 7.
Thanks!
where is the 4870. Note that it is 7 (seven), not 5 (five). All I see is 4850.
Btw, what do I do to mod a blue PCB?
Blazing fire, what's Your question specifically?
PCB color does not mather, asfar components and layout is the same.
Sorry! My question is, where is the post showing a 4870 volt mod? Eg, post #459 or something.
Blazing fire, for example my mod: http://www.xtremesystems.org/forums/...postcount=1029
Guide: http://forums.techpowerup.com/showthread.php?t=65199
Hey, got a weird problem with my vmod:
I'm running Crossfire with only one of the cards modded. I just ran Windows 7, and using Rivatuner to overclock.
I'm putting 1.3V through the gpu and trying to run it at 800mhz. Whenever I start a game, however, this resets to the stock 625mhz. What is up?:shrug:
Well, that was taken care of. Nothing that flashing couldn't fix. I flashed the clocks in the bios and now it works great!:up:
Edit: Does anybody have a bios with extra voltage for the 4850 that I could try? thanks.
Thanks man! That was exactly what I was looking for.Quote:
Originally Posted by ceemic
:up:
what voltages and clocks are you running at now?
Btw, my blue PCB differs slighty
Damn, this problem is still not over. The bios flash gave me a lot of problems so I flashed back, and again I have my rivatuner clocks jumping back to what they are stock.....Anybody know how to stop the clocks from going back to 625 once a 3d app is started?Quote:
Originally Posted by adpr_02
Ok, finally done with the GPU-mod on my non-reference card!
NOTE: This is a non-reference card and do NOT follow these images unless you have the Powercolor 1GB 4870 "pcs" - version 2.
I only did the vGPU mod, as there seems to be little or no use to pushing the memory on the DDR5 cards. I haven't done any extensive testing on performance yet, but one small test. I tried running 3Dmark06 at 850MHz, with the mod at max resistance (lowering stock input res from about 15.9kOhm to 14.9kOhm). It crashed immediately. Then I lowered the resistance a bit further and I passed 3Dmark06 at 850MHz core!
Some pictures then...
Soldering points and needed trimpot:
http://img253.imageshack.us/img253/6...copyoe4.th.jpg
vGPU measuring points:
http://img72.imageshack.us/img72/6324/measurexf5.th.jpg
And some images of my card when done. Note that its a bit messy, as I have used a non-conductive glue to insulate/help with stability:
http://img72.imageshack.us/img72/7684/vgpufx6.th.jpg
http://img257.imageshack.us/img257/5...casexa9.th.jpg
The soldering points at FB are all very very small. They are decently cleared from each other, but they are so small here is absolutely risk of detaching one of them with the leverage of moving the attached cable. I solved this by gluing a small piece of cable (1cm or so) with the end "against" the soldering point (BEFORE soldering). After the glue dried, the soldering could be done safely, and actually a lot easier than usual, as the two connecting points were already "connected" and totally stable.
Good luck for those of you with the rev2 non-reference Powercolor "pcs" 1GB!
Nice work with the soldering iron there Jim :clap:
I've GPU modded my PCS rev.1 - much easier.
http://www.diskusjon.no/index.php?ac...post&id=264424
Card can bench at 960/vpu 1.35.
Think I've posted this earlier, but heck, it's Christmas:D
what are you guys using to cool the pwm and other chips, i've voltmodded my 4870's and using mcw60's im also using the stock "heatspreader" and fan. in furmark my pwm temps are 90-93 before i shut it down, and i really can't overclock the card much more than stock volts.....any suggestions?
Regards Andrew
Thanks! Its not that the soldering points were too small to solder (did have a working microscope), but rather the dread of soldering the cable to one of them and then having a gust of wind detach the lot of it... :p:Quote:
Originally Posted by roger_h99.nor
Yours is very clean and nice - good job! Wish I had rev1 for the clearly better quality... oh well - it was cheap at the time of purchase... ;)
It is actually rather interesting that rev1 and rev2 are so different. 50Ohms vs 200kOhms for voltage regulation input for example :confused:
960MHz is impressive with these cards! :clap:
To terroristone: Airflow is the key and makes for bigger differences than I thought myself. I :banana::banana::banana::banana: you not - I gained like 15C (as in -15C) by reversing ONE 120mm fan in my chassi, making it blow fresh air on my card instead of drawing air out.
Hey you guys, is there a voltmod for the Palit/XpertVision HD4870 Dual Sonic 1024MB card? I'm planning to get two of these babies, and plan to voltmod them both.
I'm taking about his card:
http://img397.imageshack.us/img397/4...0032621hn4.jpg
It uses a new VRM design and has the same controller (NCP 5388) as the Gainward HD4850 GS. Earlier a few people where talking about this card and seemed anxious to see it released. Any user experience so far?
I came upon this post of Dejanh concerning the same card, but it never got resolved:
Quote:
Originally Posted by dejanh
My Powercolor 4870 1GB "pcs" has the same controller (NCP 5388) and I just modded my card successfully. Its actually just a few posts above yours!Quote:
Originally Posted by DemonEyez
I measured 16kOhms between pin19 and ground and soldered a 200kOhm potentiometer between that pin and ground. This worked for me and I can now adjust the GPU voltage.
Look for the resistance to ground from the 19'th pin on the image below:
http://img149.imageshack.us/img149/3...4870xn3.th.jpg
Good luck!
Thanx mate for the quick response, that was the info I was looking for. I had a hunch that i could use the same mod as you but just wanted to be sure. :) I'll post my results once I have my cards delivered to me.Quote:
Originally Posted by Jim M0rrison
Would it not be possible to pencil mod these particular 4870s as well?
Hello Everyone,
I am looking for some expert help ;)
I have managed to take my HD4850 to GPU: 680 MHz and Memory: 2360 MHz
I can't go further without volt modding my card.
I have looked at pencil vmod pics on the forums around but none have the same configuration as my card.
Can you help me out please,
Here is the backview pic of my HD4850: http://img211.imageshack.us/img211/6...cardviefn1.jpg
PS: I have also attached my BIOS file, if that can be of any help.
lycanwrath,
Pencil the resistor marked as "R711", it's located near the PCIe power connector on the backside in your pic.
Cool, cool, cool, will try that :)Quote:
Originally Posted by largon
Will this be for vpgu?
And also what are the points I need to use to measure the effective voltage?
That's vMEM. For some reason, which is now beoynd me, I assumed you were talking about vMEM pencil mod specifically...
Anyways, to even tell if vGPU pencil mod is possible I'd need a macro photo of the large'ish black rectangular chip labeled "L6713A" and it's immediate surroundings (area-of-interest greyed out in attached pic with the measuring points).
Attachment 92388
I'm looking for a V-mod for the Sapphire 4870 512MB and also the v-gpu points.
http://i228.photobucket.com/albums/e...l/DSC03467.jpg
http://i228.photobucket.com/albums/e...l/DSC03470.jpg
Any Idea?
Thanks!
mpc, do a macro-pic from that marked area: http://ceemic.pri.ee/hardware/sapphire_hd4870.jpg
Seems the same layout and possibly the same IC also: http://ceemic.pri.ee/hardware/hd4870/hd4870_02.jpg
So there applies this guide: http://forums.techpowerup.com/showthread.php?t=65199
Soldering point is other side PCB, beneath the IC.
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_01.jpg (the black wire in the left leads to Vgpu measure point)
That's a plain-jane reference HD4870 albeit the blue color.
+1 that's a reference design so the standard techpowerup 4870 vmod guide will work for you :)Quote:
Originally Posted by largon
Thanks guys. I hope my card will run good under LN2 :D
Awhile back sapphire started releasing their 4870s with the new cooler (black one on top)...is this the exact same reference design?
http://www.sapphiretech.com/en/produ...5specimage.jpg
Just rip that Stock-Cooler off und you will see :D
I will once it comes
I have the Visiontek version of this card, 512mb though, it's definitely not ref design. I bought the right ohm pots just to find out when they got here i didn't have a reference design 4870 :( - anyone know of any guides for my card?Quote:
Originally Posted by gurusan
It is this one: http://www.newegg.com/Product/Produc...82E16814129113
The PCB appears to be like that 1gb Sapphire but it's not 1gb.
You need to post pics, so they we be able to find out where the vmod is.
Ok after I spent a lot more time researching it, it winds up being the non-reference as the Palit/Gainward, however I cannot find a volt mod for that either. I may be able to get pictures, I don't have a camera though, gotta wait for a friend to come over for those =(
For people that have done it, how much does the 4870 vMEM pencil mod help?
Thanks. :)
Hey, see posts 1317 to 1323. :)Quote:
Originally Posted by ziggo0
Hmmm, that makes a lot of sense now, sadly I only have 50k pots :(Quote:
Originally Posted by DemonEyez
Hi guys,I have a Gigabyte HD4850 512MB,this one,and I am looking for a pencil mod
Here's the back of the card:
http://img266.imageshack.us/img266/4959/pict0031hw8.jpg
I need a safe 24/7 pencil mod:yepp:
DuncanOc, please do a closeup macro pic from the PWM area in the front of the card. Also from that 20pin IC (on the right of the green sticker in Your picture).
hi, i need hard mod this cardQuote:
Originally Posted by ceemic
Either of you need to take a sharp macro pic of this area:
Attachment 92773
And post it here.
That's a Winbond chip. And Winbond doesn't make any PWM controllers.Quote:
Originally Posted by ceemic
;)
largon, tnx, I couldn't see the markings.
Yes, You pointed out the right place :up:
That chip next to the green sticker at the back of the card,in my card is the Gamer HUD chip.With that,I can overclock and overvolt(very little) the memory from a software called Gigabyte GAMER HUD.
The pic that I posted before is not mine.The only difference is that chip.
That chip in the front,its called NCP5392 and I found this pdf http://www.bdtic.com/DataSheet/ON/NCP5392.pdf
Sadly I dont have a digital cam,nor a multimeter at this time.
Sorry for my bad english:)
DuncanOc, measure resistance between pin17 and GND ;)
ceemic resistance pin17 and GND = 7,21 kiloOhm
Use 200k or 100k VR for Vgpu mod ;)
ceemic vfb+200k+GND= vgpumod?
Got some new non-reference Sapphire 4870s...would like to know if voltmodding or pencil modding is possible? I think the controller says up6206ak on it.
here are some pics.
http://img244.imageshack.us/img244/4876/img3899xj0.jpg
http://jra1jw.bay.livefilestore.com/...w/IMG_3897.JPG
ptys, basically Yes.
mod work, thx master ;) 1.35v 825mhz full stable, em used 50k VRQuote:
Originally Posted by ceemic
guys,any possible pencil mod?:shrug:
DuncanOc, yes, but we need a good macro picture from that IC, so that we can see where FB pin heads to. Use Your DMM and search all points where FB goes. When there's for example a SMD resistor or cap what has GND on other end, You can use that for pencil moding.
Alrighty, I got my 200k pots in the mail, now that i hook the 2x pcie connectors up and check pin 19 with the multi meter set properly, I'm only measuring 9.4 ~ 9.5kOhms...is something wrong?
Can somebody please measure the resistance for those 3 circled items? When soldering on a wire...it popped off and took a resistor with it (I corrected this one) and doing that...removed the main circled one...so I have no idea what it's resistance should be. Please help
My First V-Mod : D
http://img102.imageshack.us/img102/2525/dsc00732nt8.jpg
http://img102.imageshack.us/img102/d...pg/1/w1024.png
http://img102.imageshack.us/img102/5342/dsc00739pj2.jpg
http://img102.imageshack.us/img102/d...pg/1/w1024.png
http://img258.imageshack.us/img258/5247/dsc00740oe0.jpg
http://img258.imageshack.us/img258/d...pg/1/w1024.png
http://img162.imageshack.us/img162/9648/dsc00742ey6.jpg
http://img162.imageshack.us/img162/d...pg/1/w1024.png
http://img232.imageshack.us/img232/5070/dsc00746yd0.jpg
http://img232.imageshack.us/img232/d...pg/1/w1024.png
http://img172.imageshack.us/img172/7633/vgpugt7.jpg
http://img172.imageshack.us/img172/v...pg/1/w1024.png
870/3800MHz :p:
:up:
8800's@over, this 1-turn trim-pot' is too risky :rolleyes:
Quote:
Originally Posted by ceemic
This is more exciting :D
Man, it has protection against Overvolting?
If yes, what vCore where he qualifies this protection?
OVP is a little different on every card, but should be on ~1,7V range...
I'm having problems and I come here to ask for help you,
My card is very instabil , I do not have a multimeter to see which is the exact voltage, temperatures are relatively good, I'm with the XOC BIOS, I can now reach up to 880MHz in AtiTool without artifact, black screen when I have more road OCCT GPU and VPU recovery times in the games and many artifacts.
What should I do?
Remembering that I have very little experience in v-mods.
May be guilty of my Trimpot?
The Weld may be poorly enforced?
8800's@over, if you don't have a good airflow over the entire card, it will overheat...
i have a watercooled 4850 running 760/1140 on stock voltages and it overheats and shuts down if there is no fan blowing air over it, even though the core is in the low 40s
...btw, i haven't looked through the entire thread yet, but is there a hard volt mod? i'm looking to run about 1.36-1.4v
I don't mean to sound harsh, but why would you even think about volt modding without a multimeter?Quote:
Originally Posted by 8800's@over
can someone confirm if this is correct, i took this from 2 different posts and just want to know if it can work on my card:
i have asus 4850 top with 3 phase power
http://ceemic.pri.ee/hardware/hd4850...50_mod_pen.JPG
now what i want to do, instead of a pencil mod is to solder a resistor there, to the points in the green circle...
i want to know what the value of the resistor should be to get about 1.4v at load...
i found this values in the other post but not sure if those relate to what i'm trying to do here
10 ohm fixed ~ 1.566v
15 ohm fixed ~ 1.465v
22 ohm fixed ~ 1.400v
27 ohm fixed ~ 1.375v
33 ohm fixed ~ 1.355v
edit, well i tried to use a 22ohm resistor, but it only added more resistance to the circuit instead of decreasing it,
obviously i lack basic understanding of electronics,
how come when i add a resistor the resistance increases, but i can connect a 100k pot and it doesn't increase the resistance by 100k,
pot is just a variable resistor, this doesn't make sense to me
Lower the voltage is lower than in stock, it seems impossible now she is more stable 830/4200MHz, before barely get 820Mhz.
Idle (500/4200) 42° Load (GTA IV - 830/4200) 53°. Stock Cooler
Will my trimpot is not holding?
With the OVP/OCP...what happens if your trim pot is truned the wrong way when you power on your card for the first time? I think this is what I did to one of my 4870s and now I get no output. I removed the mod, and ran it as a secondary to attempt a bios flash...but the ATIFlash tool doesn't even detect the second card...is it dead for good?
Quote:
Originally Posted by miahallen
i think it's fried, man
Thanks winbond (I think you're right). I've already contacted PowerColor to see if they'll let me RMA...just trying to exhaust all options....anyone else?
RMA'ing something that You consciously killed?
Now that seems unethical, IMO...
Same here, I have two Palit Dual Sonic HD4870 which shut down rather quick when there's not enough cold air blowing over the cards, eventhough the GPU temps are not so high.Quote:
Originally Posted by winbond
They don't shut down though, but produce heavy artifacting, it's mainly the GDDR5 which start to artifact.
I'm thinking of skipping on the voltmods for these cards. I fubared my last Gainward HD4850 when i was removing the volmtod on the GPU. I gave the wire just a little too much heat en when i pulled it of the whole solderpad came with it. Tried to fixed it, but in doing so I f*cked up even more. ( so if anyone is interrested in a dead Gainward 4850 GS for spare components, just give me a PM) :p:
Right now, I can do 860/1000 with stock voltage of 1.263v on the first card ( still testing the second)
I was wondering, does a HD4870 benefit more from a GPU overclock or a ram overclock? I know that with the HD4850's it is the other way around beacuse those card are rather bottlenecked by the GDDR3
Oh and btw, doing a RMA after one has fubared the card by bad modding is so lame. :mad:
Unethical?...I'm not forcing them to do anything...it's totally up to their discretion whether or not they'll process the RMA. I don't expect them to go through with it, and if they don't I wouldn't be upset...but if they do, they'll have earned my respect and possibly future sales. ;)Quote:
Originally Posted by ceemic
I worked in the retail channel for many years, and the RMA process was not always for products that were covered under the written warranty...in fact, a majority of the time, they wouldn't have been covered...but the manufactures like to take care of their customers...sometimes even in extreme situations. :up:
Besides...if their OVP was working correctly, this wouldn't have happened :p: j/k
Above 830MHz I do not have stability, regardless of voltage, OverClock of bad card?
Above it in FURMARK or games Halting and BSOD
Bad BIOS ? (OCX 795/1100 1.276v
Both cards benefit from a GPU overclock more, and hd4850 was not really bottlenecked by the gDDR3, I did some tests awhile back comparing the 2 and when clocked the same the 4870 was only 8-10% faster overall. Compared them both at 850/1000mhz if i recall correctly.Quote:
Originally Posted by DemonEyez
Okay thanx! I'll concentrate on the GPU then :)Quote:
Originally Posted by gurusan
I'm having problems with the GDDR5 ram. It wil barely do 4Ghz stable, allthough this is stockspeed for Palit Sonic 1GB HD4870's.
With Cat 8.12 I have to clock down to 975MHz to get rid of artifacts in 3Dmark06 and Crysis .
With Cat 8.11 clock set to 1000Mhz is artifact free, but 1025MHz wil give minor artifacts and 1050MHz gives massive artifacts.
Chips used are Qimoda GDDR5 and are rated 1.0ns. In all reviews these chips do at least 1100MHz.
Am I missing something here? :shrug: I have a Swiftech waterblock on the GPU, and Enzotech sinks on chips. I'm having the exact same problem with two cards, so could it be that it's not the cards themselves giving artifacts but something else?
a pdf would be appreciatedQuote:
Originally Posted by gurusan
Hello,
I vMEM and vGPU in my 4870 PowerColor (Gainward BIOS), could not stabilize it in any way, I can go up to 890MHz Core ATiTool without the artifact (30mins) and memory up to 4550MHz (30mins), plus you can not even 840/3600MHz 3D Mark 2006 or any other game, what may be happening?
;)
AtiTool is out of date for testing artifacts. I use 3DMark06 and Crysis for testing overclocks, Canyon flight and Deep Freeze are most sensitive to GDDR5 instability.
I test on the highest settings possible 1920x1200 8xAA/16XX so I know that the full 1024MB on my card is used.
Speaking of respect, you just lost any respect from my side and supposedly from many others, too.Quote:
Originally Posted by miahallen
As ceemic already denoted, you decided to risk killing your card and you think it's the manufacturers duty to replace it, free of charge? :down: The whole blah about how they decide to process the RMA or not is just miserable. If you were honest for one moment, you would acknowledge that you wouldn't even have to send it in if you didn't expect them to replace it.
IMHO, they should charge you a penalty fee for trying to screw them. The problem is that they know that you could still hurt their reputation by posting online how bad the company handled your perfectly justified RMA, i.e. plain lying. That's why most companies process the RMAs anyway, although they know it's not covered by warranty.
If I had sent in any piece of hardware that I killed due to my own stupidity or carelessness, I would have a additional system standing right next to me.
The thing is just that it's not the way you should act and you as a member carrying the title "champion" should know better. It's pathetic.
I mean if you can't afford to lose a certain piece of hardware, or you don't know what you are doing when performing vmods, then just leave it be.
It's one thing if a customer doesn't realize that he himself killed the piece of hardware, but a totally different if he, just like you, knows exactly that it was his fault.
I've got my previous 4850 killed (though I'm not sure, it was memory chip corruption and I've only VModded and OC'ed graphics chip, it can still be my fault) and I've RMA'ed it.Quote:
Originally Posted by celemine1Gig
I'm not proud of it, but i didn't have money to buy a new card instead(even the cheaper one). It's actually cheating on manufacturer, and I'd rather buy myself new card and don't even worry about it
if I earn more money. Thare's nothing pleasant in waiting a month while they process my card and thinking if they will replace it at all, or I should go and by myself HD3450.
But you can also consider this as a service. How many cards do they replace a month all over the world? 300? 400? Don't you think the cost of replaced cards is included into the cost they sell cards to dealers at? So you just use the service you had paid for, just like in case with insuarance, when you pay for what may or may not happen in the future.
P.S. All above IMO. And sorry for my English. Just couldn't resist posting.
Please,
Who knows what the max Safe Voltage for GDDR5 24 / 7?
4800MHz day can kill you?
Hey guys, just want to make sure. This is what I need for the VGPU mod right?
http://www.westfloridacomponents.com...tor+3106Y.html
EDIT: If I used a 33 Ohm fixed resistor, would the voltage be too much for 24/7 use? This is the resistor I would like to use. I don't like VRs.
http://www.radioshack.com/product/in...odsInSession=1
My card is a reference 4870 512Mb btw.
I hope you can find out what's causing it.Quote:
Originally Posted by DemonEyez
My 512mb card has no problem with 1125 on the RAM (825 gpu, 835 ran crysis (no lockup) and 3dmark without lockups but i don't trust it, since i can't loop 2006 without registration). But from many of the posts I've seen, most of the 512mb cards can usually hit 1100 or higher while the 1 GB cards start failing at "spec" memory (1000+?). I thought only the hyundai chips failed at 1000?
But yours has qimonda....
You keep asking for people to help you, and you're using a risky trimpot, and wondering why you aren't stable, and they said get a multimeter and measure the voltage, but you said you don't have one...Quote:
Originally Posted by 8800's@over
That's why no one is helping you...we don't know what voltage your card is getting!
So go buy a digital MM please....
Ceemic, here's the pic:
http://i42.tinypic.com/23t3txg.jpg
DuncanOc, what's the marking on that IC? NCP....?
Can someone answer this please?Quote:
Originally Posted by Gir92
^ 33 ohm resistor perfectly fine for 24/7 :up:
Thank you napalm.
Also, I've only done one volt mod before, so I'm not an expert.
Can I use any side of the fixed resistor for ground, or does it have to be a certain side?
DuncanOc, You have to look where pin17 heads to. Mark the trace on Your picture. As I said before, You have to find a SMD component, that is connected to GND.
Also, the 33Ohm resistor from radioshack is only rated for 1/2"
Reduce the flow of electricity in your project with this 5-pack of 33 ohm carbon-film resistors. 1/2-watt, 5% tolerance.
Max Working Voltage: 350V
Lead Length: 28 ±3mm
Temp Range: -67°F to 158°F
What's in the box
33 Ohm 1/2W 5% Carbon Film Resistor (5)
Is this bad? Will I only need to use one resistor, or more in series? Does a certain side have to be ground, or can it be either? Thanks again.
^ either side works
just one resistor
and get the 1/4w 33 ohm
I only see a 1/2" 33 Ohm. Is the 1/2w a bad thing?Quote:
Originally Posted by NapalmV5
Thanks again.
1/4w is more efficient.. better resistance
and your 4870 will perform better
sure your welcome
good luck! :toast: