How-to: Pencil mod your HD 3870!

freaksavior · Mar 20, 2008

DanishDevil said:
Damn, bad luck for ya. I'd sell you my HIS if you could return rather than RMA (premodded) good to about 877, but I doubt you can still return these...

I think the HIS cards plain just don't like more voltage.

i seem to have bad luck with mods and oc

DanishDevil · Mar 20, 2008

Sowwy.

freaksavior · Mar 20, 2008

ok so when i get home, im going to rub the card down and reset the bios and hope i can run 3dmark

sneekypeet · Mar 20, 2008

well boys I finally grew a set and put the pencil to her.
Low voltage read is 1.36V at desktop.
3D voltage is at 1.49V to the core.

Im just starting out so lets see what a .10 of a volt is good for on OC'ing!

DanishDevil · Mar 20, 2008

Good luck man! Watch those temps! I set my fan to 100% via RivaTuner while testing at high voltages.

sneekypeet · Mar 21, 2008

It ends up I can now run 3D06 at 918/1386. Netted me about 30 points more than my previous best, which was run at 3.8GHz previously. This run was at 3.6GHz.

I really want to break 13,000 just to say I did it ....not sure if the grapes are big enough.

DanishDevil · Mar 21, 2008

Dude your CPU make WAY more of a diff. than your GPU! Get your CPU to 3.8 and BENCH THAT PUPPY!

If you're nervous, set up a few fans near the 3870 to keep it cool. Keep in mind, ATi set the reference cards's fans to kick in at 90C...

sneekypeet · Mar 21, 2008

well I tried booting beyond 920 core and it pooped...needs more voltage. Im happy with the card temps. but the windows were open this winter in Ohio to boot 3.8 previously. Altho on a different mobo. I shall see what I can do over tonight !

DanishDevil · Mar 21, 2008

Attaboy! You want to know the best way to cool your entire system? Ancient Chinese Secret:

Remove side panel
Acquire industrial floor fan (you know, the ones meant to dry carpets)
Place snugly next to case with fan set to blow air into case
Set to high
OC your heart out

Steevo · Mar 21, 2008

I am assuming that BIOS has the 860Mhz fix and works with almost all reference design ATI HD3870s?

I might try a bit of a pencil mod and see where this card goes.

DanishDevil · Mar 21, 2008

Go for it. If it has R1222 on the card in the same place, you may as well give it a shot. Just follow all our recommendations and you should be fine.

Steevo · Mar 21, 2008

Flash first and see how much higher I can take this card, I am bumping up against the BIOS limit currently.

sneekypeet · Mar 21, 2008

DanishDevil said:
Attaboy! You want to know the best way to cool your entire system? Ancient Chinese Secret:

Remove side panel

Acquire industrial floor fan (you know, the ones meant to dry carpets)

Place snugly next to case with fan set to blow air into case

Set to high

OC your heart out

See we got ancient Ohio secret here....WINTER...lol

I open my windows , take the side off of my Antec900 and let ambients get to about 5*C...lol

@ Steevo...worked for my Visiontek. I had the lock , and its obviously gone now!

DanishDevil · Mar 21, 2008

Who wants to game with their nuts frozen to their chair :wtf:

I'll stick to Cali and get worse OCs, but when I get pissed I'll just walk to the beach and surf it off

sneekypeet · Mar 21, 2008

I just go with a hat and coat...only bench runs anyways....but I do use Heinekens to keep warm!

DanishDevil · Mar 21, 2008

Well ya see there's the problem. I'm 18, and booze is expensive

What you need is the Ancient Chinese Ohio Secret:

Purchase industrial fan and air-conditioning duct
place fan at side of PC with side panel off
duct the air from an open window during winter in Ohio directly to the fan
Hope that your fans don't freeze

sneekypeet · Mar 21, 2008

DanishDevil said:
Well ya see there's the problem. I'm 18, and booze is expensive

What you need is the Ancient Chinese Ohio Secret:

Purchase industrial fan and air-conditioning duct

place fan at side of PC with side panel off

duct the air from an open window during winter in Ohio directly to the fan

Hope that your fans don't freeze

I close off room and put an AC in the window....usually about 20*C in here all summer. Shadey side of the house too.

Well im off to try for 13000 just to say so!

Steevo · Mar 21, 2008

885 Core on stock voltages after the flash.

Steevo · Mar 21, 2008

I thought the new BIOS also upped the fan speed?

DanishDevil · Mar 21, 2008

No. If you want to mess with fan speeds, use RivaTuner.

Steevo · Mar 21, 2008

Lockup @ 913Mhz in 3D06 part way through the first run. Much hotter running, and this BIOS seems to not even run the fan.

DanishDevil · Mar 21, 2008

Use RivaTuner!!!!! When I upped my voltage, I set my fan at 100%, and added a high flow 120mm and 92mm fan to all directly cool the card.

913's not too shabby though :toast:

sneekypeet · Mar 21, 2008

the lockup point seems about right...~900 is good for stock volts.

Steevo · Mar 21, 2008

DanishDevil said:
Use RivaTuner!!!!! When I upped my voltage, I set my fan at 100%, and added a high flow 120mm and 92mm fan to all directly cool the card.

913's not too shabby though

I don't like the noise. So for 885 Ths stock is seeming OK, but I am going to start a 3D window and let it run and watch temps for a bit and see what it does.

DanishDevil · Mar 21, 2008

Use FurMark. I've gotten my card to its hottest by running that for about 40 mins.

System Name	ZeroUptime \| M.A.S.S / MM1
Processor	Xeon 2659 v3 / Xeon 2683 v4 / ARM A14
Motherboard	Asus X99-E-10G WS / ASRock x99 usb 3.1 / Apple
Cooling	NZXT Kraken / Noctua NH-L12 / Apple
Memory	16Gb DDR4 / 32Gb DDR4 / 16GB HBLM
Video Card(s)	Powercooler ATI vega 64 / GT 7300 / ARM
Storage	Samsung 970 512 Evo NVMe / A lot. / 256 + 512 External TB3
Display(s)	Acer Predator X34 / Headless / Acer X34 Non predator
Case	NZXT H630 \|Rosewill 8bay 4u server chasiss / MMM1
Audio Device(s)	Onboard / Onboard / Onboard
Power Supply	Corais HX850 \| Corsair TX750 / Internal 250w
Mouse	g502 proteus core / Headless / g502 proteus core
Keyboard	Corsair K95 Cherry Blue / Headless / K65 Cherry Red
Software	Windows 10 / ESXI / Big Sur 11.2.2

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

System Name	ZeroUptime \| M.A.S.S / MM1
Processor	Xeon 2659 v3 / Xeon 2683 v4 / ARM A14
Motherboard	Asus X99-E-10G WS / ASRock x99 usb 3.1 / Apple
Cooling	NZXT Kraken / Noctua NH-L12 / Apple
Memory	16Gb DDR4 / 32Gb DDR4 / 16GB HBLM
Video Card(s)	Powercooler ATI vega 64 / GT 7300 / ARM
Storage	Samsung 970 512 Evo NVMe / A lot. / 256 + 512 External TB3
Display(s)	Acer Predator X34 / Headless / Acer X34 Non predator
Case	NZXT H630 \|Rosewill 8bay 4u server chasiss / MMM1
Audio Device(s)	Onboard / Onboard / Onboard
Power Supply	Corais HX850 \| Corsair TX750 / Internal 250w
Mouse	g502 proteus core / Headless / g502 proteus core
Keyboard	Corsair K95 Cherry Blue / Headless / K65 Cherry Red
Software	Windows 10 / ESXI / Big Sur 11.2.2

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	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

How-to: Pencil mod your HD 3870!

freaksavior

To infinity ... and beyond!

DanishDevil

freaksavior

To infinity ... and beyond!

sneekypeet

Retired Super Moderator

DanishDevil

sneekypeet

Retired Super Moderator

DanishDevil

sneekypeet

Retired Super Moderator

DanishDevil

Steevo

DanishDevil

Steevo

sneekypeet

Retired Super Moderator

DanishDevil

sneekypeet

Retired Super Moderator

DanishDevil

sneekypeet

Retired Super Moderator

Steevo

Steevo

DanishDevil

Steevo

DanishDevil

sneekypeet

Retired Super Moderator

Steevo

DanishDevil

System Name	Compy 386
Processor	7800X3D
Motherboard	Asus
Cooling	Air for now.....
Memory	64 GB DDR5 6400Mhz
Video Card(s)	7900XTX 310 Merc
Storage	Samsung 990 2TB, 2 SP 2TB SSDs, 24TB Enterprise drives
Display(s)	55" Samsung 4K HDR
Audio Device(s)	ATI HDMI
Mouse	Logitech MX518
Keyboard	Razer
Software	A lot.
Benchmark Scores	Its fast. Enough.