How-to: Pencil mod your HD 3870!

Thrackan · Apr 3, 2009

for resistance, measure Ohms... symbol is like an O with an opened bottom

decmasta · Apr 3, 2009

thanks for the quick response, has anyone here modded the visiontek version?

and im pretty sure it was Ohms i was trying to measure in...

Random Murderer · Apr 3, 2009

decmasta said:
thanks for the quick response, has anyone here modded the visiontek version?

and im pretty sure it was Ohms i was trying to measure in...

if it's on a reference pcb, it doesn't matter what manufacturere it is. is there any way you could post a pic of the back of the card?

Wile E · Apr 4, 2009

decmasta said:
thanks for the quick response, has anyone here modded the visiontek version?

and im pretty sure it was Ohms i was trying to measure in...

If your multimeter was set to kV, you were trying to measure kilovolts (aka: volts x 1000).

You need this symbol to measure resistance/ohms: Ω

Thrackan · Apr 7, 2009

Ok, so the Asus non-reference 3870 is out of the case for a good while now. If anyone (RM?) is interested in up-close and personal pics of the entire PCB, front and back, give a shout.

Cold Storm · Apr 7, 2009

I shout! Come on, we need those hi-res pron pictures!!!

Random Murderer · Apr 7, 2009

yes, please.
even if you don't use yours anymore, if i can come up with a voltmod for it, it will help others.

Thrackan · Apr 7, 2009

I'll get shooting tomorrow, macro sucks without daylight.

microbious · Apr 8, 2009

Please Help

i used winflash2002 with RV670 XT.bin bios for my HD 3870 X2 to flash but i did not do any electrical or soldering work.
My video card does not display anything anymore after reboot.
$ 500.00 OH MY GOD please help.

Someone please send me original bios and maybe ATIWinflash.exe command line to program default bios ?
I still have another video card but its not crossfire, so i think that i could make a batch and than activate it blindly navigating in my computer.

Random Murderer · Apr 8, 2009

microbious said:
i used winflash2002 with RV670 XT.bin bios for my HD 3870 X2 to flash but i did not do any electrical or soldering work.
My video card does not display anything anymore after reboot.
$ 500.00 OH MY GOD please help.

Someone please send me original bios and maybe ATIWinflash.exe command line to program default bios ?
I still have another video card but its not crossfire, so i think that i could make a batch and than activate it blindly navigating in my computer.

as stated in the first post, the bios files and tools i posted are not for the x2.
i'm sorry, but as i have never used a 3870x2, i don't have the knowledge to help. what i do know is that the x2 uses two bios files and they need to match. i also know that the bios files used are specific to the x2.
you may have killed your card. i suggest opening a new thread and asking for help there.

sorry i can't be of more assistance.

troyrae360 · Apr 8, 2009

microbious said:
i used winflash2002 with RV670 XT.bin bios for my HD 3870 X2 to flash but i did not do any electrical or soldering work.
My video card does not display anything anymore after reboot.
$ 500.00 OH MY GOD please help.

Someone please send me original bios and maybe ATIWinflash.exe command line to program default bios ?
I still have another video card but its not crossfire, so i think that i could make a batch and than activate it blindly navigating in my computer.

Hey mate
Do you still need those bios? i can extract mine if you want

microbious · Apr 8, 2009

i managed to run both old one and the one i just flashed bios (the 3870 X2)
Thanks to old one i can type this message LOL.
I noticed with both cards inside computer i can see them in display properties but i can only flash the one am using right now.
Anyway that i could flash another one while using this one if they are both connected and installed ?
winflash2002 can only see old one and does not see the 3870 X2 that i want to flash with default bios.

microbious · Apr 8, 2009

yes please share your bios with me or email it at dirty@adrenalineparty.com
Make sure its RADEON HD 3870 X2 very important to match.
Thanks

sneekypeet · Apr 8, 2009

fellas please continue this line of conversation here.... http://forums.techpowerup.com/showthread.php?t=90520

Also I wouldn't leave that address out there too long

troyrae360 · Apr 8, 2009

ok then, do you want me to Overclock and set the fan or would you rather do all that yourself?

microbious · Apr 8, 2009

if your settings are safe than sure go ahead.

Thrackan · Apr 8, 2009

Rapidshare: Click

I've left all pics uncompressed and unedited for maximum viewing pleasure.
If someone can host it at a place where it can be downloaded more than 10 times, they have my full blessing to do so.
Also, these pictures may be used freely when used for the purpose of learning or teaching how the Asus EAH3870/G/HTDI/512M/A works, or graphics cards in general for that matter.

I claim "it was in plain sight" if anyone is concerned about Asus' rights in this matter

Random Murderer · Apr 8, 2009

Thrackan said:
Rapidshare: Click

I've left all pics uncompressed and unedited for maximum viewing pleasure.
If someone can host it at a place where it can be downloaded more than 10 times, they have my full blessing to do so.
Also, these pictures may be used freely when used for the purpose of learning or teaching how the Asus EAH3870/G/HTDI/512M/A works, or graphics cards in general for that matter.

I claim "it was in plain sight" if anyone is concerned about Asus' rights in this matter

i'll have a look.

kellottajaFIN · Apr 14, 2009

Damn there wasn't a thread for just 3850 only, so I post into this.. Okay, I have Sapphire's NON-reference HD3850 with 512 ddr3 but 1.4ns chips.. It OC's nicely @ 815MHz memspeed and core goes to 766MHz (vpu recover jumps @ 775MHz), so I think after short reading of some posts at this thread, that if i pencil the R1222 resistor (I hope my card has one, I am not at home right now so I can't look it now..), that the vgpu will rise? Of course there would be bios mods also, but I busted my X1800XL with biosmods some years ago.. And a poor student like me doesn't have in fact no money at all atm to buy a new card

(at summer maybe after job, but..)
But back to the point, it has completely different pcb than the reference 3850, it's at least 3cm shorter I think etc.. But does it work or not, I least try to hunt the resistor when I get home

...stupid post after all, but I would like to know that does anybody else has a similar card?
http://koti.mbnet.fi/kello90/HD3850_ja_kotelomodia/03042009010.jpg

Random Murderer · Apr 14, 2009

kellottajaFIN said:
Damn there wasn't a thread for just 3850 only, so I post into this.. Okay, I have Sapphire's NON-reference HD3850 with 512 ddr3 but 1.4ns chips.. It OC's nicely @ 815MHz memspeed and core goes to 766MHz (vpu recover jumps @ 775MHz), so I think after short reading of some posts at this thread, that if i pencil the R1222 resistor (I hope my card has one, I am not at home right now so I can't look it now..), that the vgpu will rise? Of course there would be bios mods also, but I busted my X1800XL with biosmods some years ago.. And a poor student like me doesn't have in fact no money at all atm to buy a new card (at summer maybe after job, but..)
But back to the point, it has completely different pcb than the reference 3850, it's at least 3cm shorter I think etc.. But does it work or not, I least try to hunt the resistor when I get home

...stupid post after all, but I would like to know that does anybody else has a similar card?
http://koti.mbnet.fi/kello90/HD3850_ja_kotelomodia/03042009010.jpg

would you mind posting a picture of the back of the card when you get home?

kellottajaFIN · Jun 1, 2009

Random Murderer said:
would you mind posting a picture of the back of the card when you get home?

Whoops, I truly forgot! :ohwell:

Well, here are few pics what I took with my N95 (my only camera..well, it's ok for a phonecamera)

http://www.aijaa.com/v.php?i=4290627.jpg
http://www.aijaa.com/v.php?i=4290642.jpg
http://www.aijaa.com/v.php?i=4290645.jpg

Stupid thing is that there weren't a pic from this card in the webstore where I ordered this.. Pic was from HD3650

And there wasn't no word about that this card is non-reference.. Damn, my uncle has a broken HD3850 256M and I saw the magical R1222.. :banghead:

Just haven't seen it on my card.

And oh, by the way, sorry that those images are a bit large, but now u guys should see the needed info from the card.. Hopefully somebody finds out what I need to pencil! :toast:

Random Murderer · Jun 1, 2009

i'll need you to type out the writing on the IC i circled in red.
http://www.aijaa.com/v.php?i=4291546.jpg

kellottajaFIN · Jun 1, 2009

Random Murderer said:
i'll need you to type out the writing on the IC i circled in red.
http://www.aijaa.com/v.php?i=4291546.jpg

DAMN. I'm away from home (=from my pc) this week.. I'll tell u the writings on the IC next monday.. Aaargh, I want to vmod that card.. 766MHz isn't enough, not at all..

EDIT: Yeah! One guy from a Finnish gaming forum has the same card, and I got the needed info from him.

uP6201BQ
VLP89F

I put also a PM for you if you don't check this thread before monday.

SkY-ScRaPeR · Jun 9, 2009

I have Powercolor 3870 512 M.B volt modded with Pencil & Lowered the specific resistor from 4.7 Kohm to 4.3 Kohm to increase Voltage from 1.3volt to 1.5 volt

And gained about 90 Mhz from the previous Overclock 823 Mhz -before volt mod - to be up to 905 Mhz after volt mod without problems,
but in expense of minor increase in temp about 10 c only,
COOOL

LaidLawJones · Jun 9, 2009

3870 Hard V Mod Picture

Please forgive the cross post but I thought this thread was all but forgotten. Here is a shot of my successfully modded 3870 Diamond. I had to solder in an extra 100K in resistors for the mem. 250K trimpot would work nicely. 100K for GPU worked fine set at 75K~. Thank you again Random Murderer for the guide.

System Name	Acer Aspire V3-771G-53218G75Maii
Processor	Core i5 3210M (2,5-3,1Ghz)
Memory	8GB DDR3 SODIMM
Video Card(s)	Geforce GT650M
Storage	Samsung 830 256GB - 750GB Toshiba drive
Software	Windows 7 x64 Home Premium (non-acer-bloatware)

System Name	TOO MUCH RADIATOR! \| The TV Box a.k.a. The Shoebox
Processor	Core i7 4930K @ 4.5GHz \| Core i5 6600K @ 4.5GHz
Motherboard	Asus X79 Rampage IV Extreme \| Asus Z170i Pro Gaming
Cooling	Custom water on CPU and GPU, dual 360mm radiators \| Corsair H80i
Memory	4x 8GB G.Skill TridentX DDR3-1600 \| 2x 4GB G.Skill RipJaws 4 DDR4-3000
Video Card(s)	Sapphire AMD R9 295x2 \| PowerColor AMD HD7970
Storage	Samsung SSD 830 256GB, various others \| 2x 1TB Seagate Barracudas in RAID1
Display(s)	Dell U2713HM 2560x1440 IPS \| Panasonic TC-L32E5 1080p IPS TV
Case	Thermaltake Suppressor F51 (stripped down to hold two radiators) \| Cooler Master Elite 130
Audio Device(s)	RM-DAC -> Xiang Sheng 708b -> Sennheiser HD650 \| HDMI sound device on 7970
Power Supply	LEPA G1600-MA 1600W \| Corsair CX750M 750W
Software	Win 10 64
Benchmark Scores	over 9000 BungholioMarks, "Bitchin' Fast"

System Name	The ClusterF**k
Processor	980X @ 4Ghz
Motherboard	Gigabyte GA-EX58-UD5 BIOS F12
Cooling	MCR-320, DDC-1 pump w/Bitspower res top (1/2" fittings), Koolance CPU-360
Memory	3x2GB Mushkin Redlines 1600Mhz 6-8-6-24 1T
Video Card(s)	Evga GTX 580
Storage	Corsair Neutron GTX 240GB, 2xSeagate 320GB RAID0; 2xSeagate 3TB; 2xSamsung 2TB; Samsung 1.5TB
Display(s)	HP LP2475w 24" 1920x1200 IPS
Case	Technofront Bench Station
Audio Device(s)	Auzentech X-Fi Forte into Onkyo SR606 and Polk TSi200's + RM6750
Power Supply	ENERMAX Galaxy EVO EGX1250EWT 1250W
Software	Win7 Ultimate N x64, OSX 10.8.4

System Name	Acer Aspire V3-771G-53218G75Maii
Processor	Core i5 3210M (2,5-3,1Ghz)
Memory	8GB DDR3 SODIMM
Video Card(s)	Geforce GT650M
Storage	Samsung 830 256GB - 750GB Toshiba drive
Software	Windows 7 x64 Home Premium (non-acer-bloatware)

System Name	Haro
Processor	AMD 1700x
Motherboard	AsRork x370 Taichi
Cooling	EK Custom Loop - CPU only
Memory	32gb G-Skill Trident Z
Video Card(s)	EVGA 1080 Superclock 2
Storage	Too Many
Display(s)	Viewsonic VX2450WM-LED 24" & LG 32 IPS
Case	Cooler Master Cosmos II
Power Supply	Cooler Master V1000
Mouse	SteelSeries Rival 500
Software	Win10 Pro
Benchmark Scores	i5 750 4.62ghz pi runs // Evga FTW p55

System Name	My Computer!
Processor	AMD 6400+ Black @ 3.5
Motherboard	Gigabyte AM2+ GA-MA790X DS4
Cooling	Gigabyte G-Power 2 pro
Memory	2x2 gig Adata 800
Video Card(s)	HD3870x2 @ 900gpu and 999mem
Storage	2x wd raid edition 120gig + 1 samsung 320 + samsung 250
Display(s)	Samsung 40inch series6 full HD 1080p
Case	NZXT Lexa
Audio Device(s)	ALC889A HD audio with Enables a Superior Audio Experience (on board)
Power Supply	Vantec ION2+ 550w
Software	Vista Home pream 64

System Name	EVA-01
Processor	Intel i7 13700K
Motherboard	Asus ROG Maximus Z690 HERO EVA Edition
Cooling	ASUS ROG Ryujin III 360 with Noctua Industrial Fans
Memory	PAtriot Viper Elite RGB 96GB @ 6000MHz.
Video Card(s)	Asus ROG Strix GeForce RTX 3090 24GB OC EVA Edition
Storage	Addlink S95 M.2 PCIe GEN 4x4 2TB
Display(s)	Asus ROG SWIFT OLED PG42UQ
Case	Thermaltake Core P3 TG
Audio Device(s)	Realtek on board > Sony Receiver > Cerwin Vegas
Power Supply	be quiet DARK POWER PRO 12 1500W
Mouse	ROG STRIX Impact Electro Punk
Keyboard	ROG STRIX Scope TKL Electro Punk
Software	Windows 11

System Name	doesn't have o_O
Processor	AMD Phenom II X4 965BE @ 3.7GHz
Motherboard	ASRock M3N78D
Cooling	OCZ Gladiator Max w/Nexus 120mm PWM
Memory	16GB DDR3 1333MHz
Video Card(s)	Gigabyte GTX470 SOC 1280MB @ 750/1825MHz
Storage	ADATA SP900 64GB SSD + 1140GB HDD's
Display(s)	BenQ GL2240M (22" 1920x1080)
Case	Fractal Design Define R4
Audio Device(s)	Sound Blaster X-Fi XtremeGamer
Power Supply	Antec EarthWatts 500W
Software	Windows 7 Ultimate x64 SP1
Benchmark Scores	3DMark03: 83487pts 3DMark05: 25470pts 3DMark06: 20531pts

Processor	Core2 Duo E7200 @ 3.6Ghz
Motherboard	ASUS
Memory	4 GB PC6400 @ 950 Mhz
Video Card(s)	PowerColor ATI HD 3870 512 @ 823/1098
Storage	360 GB WesTern
Software	Vista 64

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