How-to: Pencil mod your HD 3870!

Deleted member 24505 · Jan 16, 2008

The vgpu on both of them should be around 1.33v,i test mine while running 3d06.

Random Murderer · Jan 16, 2008

Rhinofart said:
Well, I just double checked everything, and for shits n giggles I replaced the battery in my DMM. Ground (I did both the chassis, and the ground in a molex plug) and then the positive to ALL 4 points. Now this is where things get a little interesting. My top card (PCIE0) reads 1.39 Volts along all 4 of the test spots and on both sets of grounds. My bottom card (PCIE1) reads only 1.20 Hmmm weird me thinks? Yes indeed.
I forgot to mention. Playing Crysis at 1600x1200 on HIGH is very nice and playable! Woooot! Plus my 3DM scores did go up a bit too. I'll try OCing the cards without any voltmods for now and see how well they hold out.

One card is in 3D mode while the other is not, simple as that.

trog100 · Jan 16, 2008

i tested mine right after booting tigger.. not quite sure what would have happened running 2006 with 2.5 volts going thru it.. he he he

put one prong in a case hole the other on the positive point on the card and boot the machine.. is the easiest way to do it..

it goes straight into 3d voltage from the boot.. when it gets to windows it drops to 2d voltage..

there is also some kind of over voltage protection at work.. it wont boot with too much voltage.. it will with 2.5 thow.. he he he

i am leaving mine with the pencil.. it now reads 1.39 volts.. i would like 1.41 but its too fiddly to get exactly what u want with the pencil..

trog

Random Murderer · Jan 16, 2008

trog100 said:
i tested mine right after booting tigger.. not quite sure what would have happened running 2006 with 2.5 volts going thru it.. he he he

put one prong in a case hole the other on the positive point on the card and boot the machine.. is the easiest way to do it..

it goes straight into 3d voltage from the boot.. when it gets to windows it drops to 2d voltage..

there is also some kind of over voltage protection at work.. it wont boot with too much voltage.. it will with 2.5 thow.. he he he

i am leaving mine with the pencil.. it now reads 1.39 volts.. i would like 1.41 but its too fiddly to get exactly what u want with the pencil..

trog

Mine runs 1.44v and it's pencil modded...

Cold Storm · Jan 16, 2008

trog100 said:
i tested mine right after booting tigger.. not quite sure what would have happened running 2006 with 2.5 volts going thru it.. he he he

put one prong in a case hole the other on the positive point on the card and boot the machine.. is the easiest way to do it..

it goes straight into 3d voltage from the boot.. when it gets to windows it drops to 2d voltage..

there is also some kind of over voltage protection at work.. it wont boot with too much voltage.. it will with 2.5 thow.. he he he

i am leaving mine with the pencil.. it now reads 1.39 volts.. i would like 1.41 but its too fiddly to get exactly what u want with the pencil..

trog

You can try and try again till you get to 1.41... but then it would be 4 hours later, and you might have less hair then you started with... sounds good on the read out trog.

Rhinofart · Jan 16, 2008

Even in Crossfire?

Random Murderer said:
One card is in 3D mode while the other is not, simple as that.

Even with the card in crossfire? I'll have to get FUR running for stability and redo the readings.

Random Murderer · Jan 16, 2008

Rhinofart said:
Even with the card in crossfire? I'll have to get FUR running for stability and redo the readings.

Run the ATiTool fuzzy cube, that's the ONLY thing I've found that puts my card at 100% usage...

trog100 · Jan 16, 2008

one thing about the crossfire setup.. what happens when the thing u are running isnt using the second card at all.. most things dont.. the fur bench dosnt.. the lightsmark thing dosnt.. the furry thing in atitool wont..

i think i have the answer here.. when only one card is working only one card ups its voltage..

try a 3dmark.. at least they use two cards.. without proper driver support nothing else does..

basically C/F only works when the thing u are running has support for it built in.. its just like multiple cpus..

trog

ps.. which by the way is one of the reasons i got rid of my second 3870 card..

Deleted member 24505 · Jan 16, 2008

i'm working on a new mark2 volt mod,i have used 2 pin connection blocks.1 goes on the card with the connections to ground,mod connection point and vgpu measure point,and the second which plugs into the first one whith the trimmer and vgpu measure points on it.If i want to disable it,all i have to do is pull the block with the trimmer on it off.

Pics tommorow

Rhinofart · Jan 16, 2008

Damn Tigger that sounds sweet.

That sounds like one sweet mod Tigger. As for my voltage testing in 3dMark. I'll have to wait till the Vista portion of my triple boot is done so I can do that. WinXP_Pro32, WinXP_Prox64, and Vista 64 Bit. Still debating if I want to put Linux on there too.

trog100 · Jan 17, 2008

how about two switchable ones tigger.. a gentle one for gaming and a nasty kick up the ass one for benching.. he he he.. dont switch it off.. just switch it down..

trog

Deleted member 24505 · Jan 17, 2008

I suppose you could build some sort of resitor array.use the trimmer to find the correct resistances for whatever voltaage,then make up a switchable resitor array.

Random Murderer · Jan 17, 2008

tigger69 said:
I suppose you could build some sort of resitor array.use the trimmer to find the correct resistances for whatever voltaage,then make up a switchable resitor array.

Hmm. That's not a bad idea...

Source · Jan 17, 2008

Hey Rhino, what bios are you using for your Diamond cards, I am also running Diamond HD3870

Rhinofart · Jan 17, 2008

Source said:
Hey Rhino, what bios are you using for your Diamond cards, I am also running Diamond HD3870

It's the stock BIOS that came with the cards. I flashed it this morning with one of the ones I found here in the Forums to try that out. My voltage readings have not changed yet. They are the same. But with 3DMark running I now get proper Voltage on the bottom card. Thanks for the tip on that guys. I think I'm going to check the resistance of the points on this card. Maybe I got one that someone already had and did a pencil mod to?? I looked at it when I got it, and it all looked like a nice factory sealed job, but you never do know.

trog100 · Jan 17, 2008

interesting fact the voltage only going up on one card.. it tells me C/F has nothing to do with the ATI cats and everything to do with the software being run..

i expected some performance increase in everything even if not much.. it dosnt seem this way thow.. if the software isnt specifically written to use two cards one simply sits there doing nothing at all except adding to the leccy bill..

so its more down to the game writers than the cat writers.. not a good sign.. it does make some things clear thow.. we are totally at the mercy of the software guys both with multi cpu and multi gpu..

irrespective of what most folks think multi cpu has pretty much failed with games so far lets hope multi gpu fares better..

trog

Random Murderer · Jan 17, 2008

trog100 said:
interesting fact the voltage only going up on one card.. it tells me C/F has nothing to do with the ATI cats and everything to do with the software being run..

i expected some performance increase in everything even if not much.. it dosnt seem this way thow.. if the software isnt specifically written to use two cards one simply sits there doing nothing at all except adding to the leccy bill..

so its more down to the game writers than the cat writers.. not a good sign.. it does make some things clear thow.. we are totally at the mercy of the software guys both with multi cpu and multi gpu..

irrespective of what most folks think multi cpu has pretty much failed with games so far lets hope multi gpu fares better..

trog

Multi-CPU has not failed, multi-threading has.
Try running Crysis on a single core CPU and tell me the results.

trog100 · Jan 17, 2008

Random Murderer said:
Multi-CPU has not failed, multi-threading has.
Try running Crysis on a single core CPU and tell me the results.

u tell me.. i would love to run such a test.. but dont have a suitable single core cpu..

i strongly suspect assuming it was fast enough it would do a reasonable job..

trog

Cold Storm · Jan 17, 2008

RM, put it on your dads rig! Thats the only single core that I know around here...

Random Murderer · Jan 17, 2008

Cold Storm said:
RM, put it on your dads rig! Thats the only single core that I know around here...

that's a dual core, noob!

Cold Storm · Jan 17, 2008

I thought it was a p4... i'm so dang tired...

Random Murderer · Jan 17, 2008

Cold Storm said:
I thought it was a p4... i'm so dang tired...

Lol, no worries!

Wile E · Jan 17, 2008

trog100 said:
u tell me.. i would love to run such a test.. but dont have a suitable single core cpu..

i strongly suspect assuming it was fast enough it would do a reasonable job..

trog

Sure you do. Add /numproc=1 to the end of your boot.ini. Bam! Instant single core. lol.

Random Murderer · Jan 17, 2008

Wile E said:
Sure you do. Add /numproc=1 to the end of your boot.ini. Bam! Instant single core. lol.

Wow, never knew that, lol.

Wile E · Jan 17, 2008

Random Murderer said:
Wow, never knew that, lol.

It's great for single threaded benches. Takes a lot of the heat out of the cpu, allowing you to push more volts and clock higher without fear of an overheat.

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	money pit..
Processor	Intel 9900K 4.8 at 1.152 core voltage minus 0.120 offset
Motherboard	Asus rog Strix Z370-F Gaming
Cooling	Dark Rock TF air cooler.. Stock vga air coolers with case side fans to help cooling..
Memory	32 gb corsair vengeance 3200
Video Card(s)	Palit Gaming Pro OC 2080TI
Storage	150 nvme boot drive partition.. 1T Sandisk sata.. 1T Transend sata.. 1T 970 evo nvme m 2..
Display(s)	27" Asus PG279Q ROG Swift 165Hrz Nvidia G-Sync, IPS.. 2560x1440..
Case	Gigabyte mid-tower.. cheap and nothing special..
Audio Device(s)	onboard sounds with stereo amp..
Power Supply	EVGA 850 watt..
Mouse	Logitech G700s
Keyboard	Logitech K270
Software	Win 10 pro..
Benchmark Scores	Firestike 29500.. timepsy 14000..

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	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	Primary Gaming System
Processor	Athlon 64 X2 6400+ Black Edition
Motherboard	Gigabyte MA790FX-DQ6
Cooling	Swiftech H20-220 with Storm Waterblock and 2 DangerDen Maze5s
Memory	OCZ Platinum XTC DDR2-800
Video Card(s)	Diamond Viper Radeon HD3870 x 2
Storage	Segate Barracuda 500Gb x2 Segate Baracuda 320Gb x1
Display(s)	Dell FP2007 (Primary), Daytek 19" (Secondary)
Case	Lian Li PC-60 (heavily modified by me) The Dremel IS your friend.
Audio Device(s)	Auzentech X-FI Prelude
Power Supply	Corsair 620 Watt
Software	Windows XP Pro x64, Windows Vista Ultimate 64Bit
Benchmark Scores	She's so new I haven't tweaker her yet for benchies.

System Name	The Punisher
Processor	Intel Q6600 @ 3.6 1.382v
Motherboard	Asus Maximus Formula (Rampage Mod)
Cooling	Kandalf VD4000 LCS
Memory	4x1024 Ballistix Tracer DDR2 4-5-4-12 1066MHz 2.12v
Video Card(s)	Diamond HD3870X2 1GB
Storage	74G Raptor 740GD 8MB \| 500G WD5000AAKS 16MB
Display(s)	24" Westinghouse L2410NM & 19" Dell 1907FP
Case	Kandalf VD4000 LCS
Audio Device(s)	Supreme FXII 8.1 \| Audio FX Pro 5.1 Headset
Power Supply	Ultra X2 750W Modular PS
Software	Windows XP Pro x64 SP2

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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