How-to: Pencil mod your HD 3870!

eidairaman1 · May 4, 2008

probably had some anti-corrosive chemical on it for shipping.

DC · May 4, 2008

http://img360.imageshack.us/my.php?image=sn2000802rb7.jpg

http://razerdeck.free.fr/JMH/photos/3870benji/SN200081.JPG

http://razerdeck.free.fr/JMH/photos/3870benji/SN200094.JPG

eh... thanks in advance, mates...

Dr. Spankenstein · May 4, 2008

Looks pretty barren...

I don't see any provision for a pencil mod on your card. I may be wrong though.

Someone see something that I don't?

DanishDevil · May 4, 2008

I don't know anything about this kinda stuff, but it looks like the area we would focus on with his card would be right behind the 6-Pin power connector. I see the same square chip that we do on the back side of ours...

SpookyWillow · May 5, 2008

DC said:
http://img360.imageshack.us/my.php?image=sn2000802rb7.jpg

http://razerdeck.free.fr/JMH/photos/3870benji/SN200081.JPG

http://razerdeck.free.fr/JMH/photos/3870benji/SN200094.JPG

eh... thanks in advance, mates...

no mod has been found for that card yet, its an asus one isn't it?

DC · May 5, 2008

yes, it is... i tried playing with pencil at the back of the card with the points that could be ones i needed... but no success yet((( i'm very upset

SpookyWillow · May 5, 2008

this is the closest i've seen yet on that card, nobody seems to be able to get the required pdf's for the asus cards.

http://www.xtremesystems.org/forums/showpost.php?p=2880403&postcount=670

DC · May 5, 2008

i've even written to asus... waiting for reply... but i think it's useless

CBOT · May 8, 2008

Here the New Version of PowerColor HD3870 512MB GDDR3 FP Edition.

No R1222.

Random Murderer · May 8, 2008

CBOT said:
Here the New Version of PowerColor HD3870 512MB GDDR3 FP Edition.

No R1222.

shade the resistor i covered in green. i don't know values, but this should work.

DavyGT · May 8, 2008

Is 88*C hot for a 3850/70? That is the load temperature after 1hour of ATitool. I managed to reduce resistance from 2.40 to 1.80 and will push more from my 3850 512mb if it isn't too hot.
Strangely enough, some pencils aren't good at reducing resistance. I only managed to lower the voltage from a Faber Castell 2B. My 4B, 4H, 6H didn't work and only increased resistance. :confused:

Also, I know that I'm going to approach the 860mhz barrier if I keep going. There isn't an ASUS 3850 512mb .71 BIOS in the repository and I tried (literally) every BIOS in the repository. And everyone of them, except for the ASUS ones, didn't work, throwing up a subset systems mismatch. What can I do now? More importantly, how did you crossflash it to another manufacturer?

CBOT · May 8, 2008

Random Murderer said:
shade the resistor i covered in green. i don't know values, but this should work.

thx.
But no Voltage change when i Pencil.

Random Murderer · May 8, 2008

CBOT said:
thx.
But no Voltage change when i Pencil.

what is the default resistance?
how far did you drop the resistance?

DanishDevil · May 8, 2008

CBOT said:
thx.
But no Voltage change when i Pencil.

You might need to rough up the area with a nail file or something similar. Do you see the coating over the card that kind of looks like clear nail polish or something? That could be preventing you from reaching the metal contacts and getting any voltage change.

RM: If this helps, it would be the 3rd or 4th time it's helped, and maybe you could add it as a tip to the first post?

Random Murderer · May 8, 2008

DanishDevil said:
You might need to rough up the area with a nail file or something similar. Do you see the coating over the card that kind of looks like clear nail polish or something? That could be preventing you from reaching the metal contacts and getting any voltage change.

RM: If this helps, it would be the 3rd or 4th time it's helped, and maybe you could add it as a tip to the first post?

will do.

CBOT · May 9, 2008

Random Murderer said:
what is the default resistance?
how far did you drop the resistance?

Hehe i have no Idea :rockout:

No Voltage Controll Hardware here so i make it with Luck

when the Card Die i buy a new one.

@DanishDevil
Thx. i will do this and Test it Card PCB was really dirty.

Edit: I think my Bios is Locked 864Mhz dont work but 850Mhz runs fine.
Voltage change on Bios from 1,214 to 1,274 gives me higher Temps befor 37C idle now 48C idle and Pencil the same but no more Mhz will go .I think bios was Locked, no the Problem is i have a GDDR3 3870 and i found no unlocked bios for my Card.
So can i Flash a Unlocked 3850 Bios with Samsung 1ns Ram to Unlock them?

DavyGT · May 11, 2008

CBOT said:
Edit: I think my Bios is Locked 864Mhz dont work but 850Mhz runs fine.
Voltage change on Bios from 1,214 to 1,274 gives me higher Temps befor 37C idle now 48C idle and Pencil the same but no more Mhz will go .I think bios was Locked, no the Problem is i have a GDDR3 3870 and i found no unlocked bios for my Card.
So can i Flash a Unlocked 3850 Bios with Samsung 1ns Ram to Unlock them?

I don't think you should. I mean, I don't know what's stopping you from flashing it to a 3850, but I just... wouldn't do that.
What's your max temp?

DC · May 11, 2008

so.. no ideas about asus 3870?(

Random Murderer · May 11, 2008

DC said:
so.. no ideas about asus 3870?(

no, asus has decided to use proprietary parts, so until an asus rep wants to tell us the pinout of those parts, we're screwed.

DC · May 11, 2008

hm... and no ideas how i can make to become a Columbus?

... i can check any variants...

Random Murderer · May 12, 2008

DC said:
hm... and no ideas how i can make to become a Columbus? ... i can check any variants...

no, you don't understand: there is absolutely NO data on the parts they use...

DanishDevil · May 12, 2008

Ok guys, I started to pencil this new 3870 (Built by ATi under the GeCube brand name) and my first step was to flash to the BIOS attached, which is the newest (0.79) for the Built By ATi cards.

Stock resistance was 1.62, with 3D voltages of 1.34V.

My first pencil got me .8 resistance, with 3D voltages of 1.44V. I set the fan to 100%, added a 120mm and 92mm of my own, and it was time to begin testing.

Since I got just over 864 before the penciling (after the flash to get rid of that bug) I tried for 904.5. Seemed to work like a charm giving me 3383 fur marks with memory at stock. Then, I bumped to 918, and ran again. My score was less than before. I thought, hmm...wtf...

I checked the hardware monitoring, and saw this:

It's tough to see, but once it went into 3D mode, the core dropped to 864 and it ran the benchmark. I disabled OCing (the drop to 224), reenabled, and set for 914 again, and as you can see, it dropped me again to 864.

Has anyone seen/experienced this before? If you take a look at the bios in RBE, it's 3D clocks are set to the 777 stock speeds, so it didn't kick them down because of that, and besides, Rivatuner should be overriding that anyway.

Thanks in advance for the help guys!

DanishDevil · May 12, 2008

I just upped my PCI-E clock to 115MHz and it fixed my problem. Thanks to fit! :rockout:

Trying to get 945 core stable!

Wile E · May 12, 2008

DanishDevil said:
Ok guys, I started to pencil this new 3870 (Built by ATi under the GeCube brand name) and my first step was to flash to the BIOS attached, which is the newest (0.79) for the Built By ATi cards.

Stock resistance was 1.62, with 3D voltages of 1.34V.

My first pencil got me .8 resistance, with 3D voltages of 1.44V. I set the fan to 100%, added a 120mm and 92mm of my own, and it was time to begin testing.

Since I got just over 864 before the penciling (after the flash to get rid of that bug) I tried for 904.5. Seemed to work like a charm giving me 3383 fur marks with memory at stock. Then, I bumped to 918, and ran again. My score was less than before. I thought, hmm...wtf...

I checked the hardware monitoring, and saw this:

http://img.techpowerup.org/080512/Wtf....jpg

It's tough to see, but once it went into 3D mode, the core dropped to 864 and it ran the benchmark. I disabled OCing (the drop to 224), reenabled, and set for 914 again, and as you can see, it dropped me again to 864.

Has anyone seen/experienced this before? If you take a look at the bios in RBE, it's 3D clocks are set to the 777 stock speeds, so it didn't kick them down because of that, and besides, Rivatuner should be overriding that anyway.

Thanks in advance for the help guys!

Something similar to that happens to me with my 8800GT in 3DMark05. I just said "eff" it, and flashed the card to the clocks I was trying to get Riva to use. Then I flashed it back to stock when done. lol.

DanishDevil · May 12, 2008

Haha nice. Looks like the PCI-E clock helped it for me.

System Name	PCGOD
Processor	AMD FX 8350@ 5.0GHz
Motherboard	Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling	Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory	16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s)	AMD Radeon 290 Sapphire Vapor-X
Storage	Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s)	NEC Multisync LCD 1700V (Display Port Adapter)
Case	AeroCool Xpredator Evil Blue Edition
Audio Device(s)	Creative Labs Sound Blaster ZxR
Power Supply	Seasonic 1250 XM2 Series (XP3)
Mouse	Roccat Kone XTD
Keyboard	Roccat Ryos MK Pro
Software	Windows 7 Pro 64

Processor	Intel C2D E8500 @ 4.25GHz (1.36V)
Motherboard	Gigabyte GA-X38-DQ6
Cooling	(Temporary) Tuniq Tower 120
Memory	2GB Transcend aXeram 1200+
Video Card(s)	HIS HD3870 CF Volt modded
Storage	3 Seagate 320Gb Barracuda in an Intel Matrix Raid array
Display(s)	Sony GDM-FW900 24" Widescreen CRT (a.k.a "The Shiznotch")
Case	Ultra Aluminus Full Tower
Audio Device(s)	onboard Intel HD audio
Power Supply	PC Power & Cooling Silencer 750
Software	XP MCE + Vista (HP) dual-boot

System Name	Big Devil
Processor	Intel Core i5-2500K
Motherboard	ECS P67H2-A2
Cooling	XSPC Rasa \| Black Ice GT Stealth 240 \| XSPC X2O 750 \| 2x ACF12PWM \| PrimoChill White 7/16"
Memory	2x4GB Corsair Vengeance LP Arctic White 1600MHz CL9
Video Card(s)	EVGA GTX 780 ACX SC
Storage	Intel 520 Series 180GB + WD 1TB Blue
Display(s)	HP ZR30W 30" 2650x1600 IPS
Case	Corsair 600T SE
Audio Device(s)	Xonar Essence STX \| Sennheisser PC350 "Hero" Modded \| Corsair SP2500
Power Supply	ABS SL 1050W (Enermax Revolution Rebadge)
Software	Windows 8.1 x64 Pro w/ Media Center
Benchmark Scores	Ducky Year of the Snake w/ Cherry MX Browns & Year of the Tiger PBT Keycaps \| Razer Deathadder Black

Processor	3570-K @ 4.4
Motherboard	Gigabyte Z77-DH3
Cooling	cosair H100
Memory	8gb samsung green
Video Card(s)	Inno3d 580GTX
Storage	240gb Vertex 3 +500gb samsung F1 + 640gb samsung F(something)
Display(s)	BenQ G2220HD
Case	CoolerMaster CMStacker
Audio Device(s)	onboard
Power Supply	Corsair TX750w
Software	Windows 7

Processor	3570-K @ 4.4
Motherboard	Gigabyte Z77-DH3
Cooling	cosair H100
Memory	8gb samsung green
Video Card(s)	Inno3d 580GTX
Storage	240gb Vertex 3 +500gb samsung F1 + 640gb samsung F(something)
Display(s)	BenQ G2220HD
Case	CoolerMaster CMStacker
Audio Device(s)	onboard
Power Supply	Corsair TX750w
Software	Windows 7

Processor	AMD Phenom X4 9750
Motherboard	Gigabyte MA-790FX-DS5
Cooling	Thermalright HR-03 Plus
Memory	2x1GB Aeneon XTune PC2-800
Video Card(s)	Gainward 9800GTX
Storage	1xSamsung 320GB
Display(s)	Asus MW221U 22"
Case	Antec
Audio Device(s)	Creative Soundblaster Live!
Power Supply	Be Quit 450Watt
Software	Windows XP Pro SP3

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

How-to: Pencil mod your HD 3870!

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