Overclockers

{PMS}fishy · 04-17-06, 06:09 PM

Official 7900GT Volt Mod Thread.

I think the picture speaks for itself, but a little information to avoid confusion.

All that you need to do is connect one of the two points, or both to achieve an overvoltage on the card. ***NO OTHER MODIFICATIONS REQUIRED***

Connecting Yellow point to ground will give you +0.1v or 1.3v vGPU, can be verified at the red point marked out on the card.

Connecting Orange point to ground provides +0.2v or 1.4v vGPU, can be verified at the red point marked out on the card.

Connecting both the Yellow and Orange point to ground provides +0.1v & +0.2v or 1.5v vGPU.

Personally I would not run more than 1.4v on stock cooling, temps will be rather high, and I wouldn't expect the card to scale well at all.

It is possible to achieve 0.05v as well, but to keep this simple I have left it out. Most people will be modding to 1.4v on air, and 1.5v on water. It is also possible, with the removal of componets to achieve grater than 1.5v. I would highly suggest not going over 1.5v unless you are running water cooling at a minimum.

1.4-1.5v with good cooling should provide the ability to clock up to, or over 700mhz core on these 7900GTs.

7900GT 1.5v Hard Mod.

First locate this area on the top left of the card. This is where we will be working.

Once you locate that area, the resistor in the top left above u502 needs to be removed and replaced with a 50k resistor.

This mod can be used in conjunction with the above 'ink' mods to increase voltage beyond 1.5v. There are also OCP resistors, and a bucket mod. I'll add those on later today.

g0dM@n · 04-18-06, 12:55 AM

Rock on! Can't wait to see what these score when nVidia decides to start stocking like they should be!!

d94 · 04-18-06, 09:27 AM

cant wait to see some results
as im wondering if i should keep my 512mb x1800xt or get one of these

g0dM@n · 04-18-06, 09:51 AM

You know what I didn't even realize? I can't believe no POTs are required!!

That is just SO EASY!

snakeskinner · 04-18-06, 04:39 PM

Quote:

Originally Posted by d94

cant wait to see some results
as im wondering if i should keep my 512mb x1800xt or get one of these

If you want some results, here are mine. This is the base EVGA 7900GT card, stock clocks are 450/660. I did the 1.5 volt mod and i'm running the water cooling in my sig. Its now clocked at 724/921.

3dmark05 12,122

http://service.futuremark.com/compare?3dm05=1935234

3dmark06 6,750

http://service.futuremark.com/compare?3dm06=229525

Marlon

Alchemy1 · 04-23-06, 04:05 PM

What kind of temps are you guys getting when your at 1.5v and on what type of cooling? How safe do you guys think 1.5v is? I feel comfortable with 1.4v on water cooling, but I don't know about 1.5v especially with summer coming up.

Codeman05 · 04-23-06, 04:42 PM

I'm running about 45C load at 1.5v watercooled

I would also recommend putting sinks on these ICs

Pic taken from the XS thread

Mine were extremely hot after the mod

soloz2 · 04-23-06, 05:45 PM

I'm getting an Asus TOP version, does anyone know if any of the memory modules are covered w/ anything that would still work w/ my waterblock? for example, I didn't have to use all my ramsinks on my 7800GT bc there was a stock heatsink I could use for 4 of them.

I want to do this volt mod, but if the 7900GT doesn't have anything I'll have to use all my ramsinks on the memory and will have to buy extra for the two IC's on the back of the card.

also, what is best to use, a pencil or one of those pens?

four4875 · 04-23-06, 06:53 PM

seein as you have to connect to ground... i would say you need to solder on a wire. it should be a piece of cake, even for beginners. just alittle archofwire, and connect to whichever one you want to use, or you can stick it across to both if you desire the 1.5V.

Codeman05 · 04-23-06, 06:55 PM

Quote:

Originally Posted by soloz2

also, what is best to use, a pencil or one of those pens?

you can use a conductive pen / paint for the Vgpu mod...many have done it already. A pencil can be used for the Vmem mod, but be extremely careful as it is not exactly an "accurate" method

four4875 · 04-23-06, 07:11 PM

are the pads beside the points grounded? i figured that they werent, caus nothin was mentioned about bein able to just bridge them

Alchemy1 · 04-23-06, 07:58 PM

Quote:

Originally Posted by Codeman05

you can use a conductive pen / paint for the Vgpu mod...many have done it already. A pencil can be used for the Vmem mod, but be extremely careful as it is not exactly an "accurate" method

Yup, that is exactly what I did. I should have taken pics, but I didn't. Here is the pic I used as a guide. It is easy to do. Only thing is the pen costs like $13 if you don't already have one at your disposal.

{PMS}fishy · 04-23-06, 08:09 PM

Quote:

Originally Posted by four4875

are the pads beside the points grounded? i figured that they werent, caus nothin was mentioned about bein able to just bridge them

No, they are not.

snakeskinner · 04-24-06, 10:22 AM

Quote:

Originally Posted by Alchemy1

What kind of temps are you guys getting when your at 1.5v and on what type of cooling? How safe do you guys think 1.5v is? I feel comfortable with 1.4v on water cooling, but I don't know about 1.5v especially with summer coming up.

My watercooling is in my sig. I never get over around 41-42 with 1.5v. I ran 1.55v for a while and temps were around 46-48. Idle and load don't change much though, idle is around 39 and load 41-42.

Marlon

-aDaM^ · 04-25-06, 09:03 PM

is there a volt mod for the memory?

Also great job with the 1.4 voltmod guys

700mhz on the core is sweet.

crimedog · 04-25-06, 09:19 PM

Quote:

Originally Posted by -aDaM^

is there a volt mod for the memory?

look up

Highlander · 04-26-06, 01:59 AM

Slightly different to the "normal" mods, due to the this card not loving high voltages and a little more control being required.
1.5 VID "hardmod" with VR's to decrease/increase vGPU (1.37 - limited by UVP -> ~ 1.57-1.6 (limited by OVP)
vDD mod, 1.9 -> 2.4v

Currently card runs 660/850 on 1.415/2.03 benchable (tho totally clean) rams clean at 1010mhz w/ 2.15 vDD as well, but can't hit those speeds with high GPU speeds (yet

)

{PMS}fishy · 04-26-06, 03:15 AM

Quote:

Originally Posted by -aDaM^

is there a volt mod for the memory?

Also great job with the 1.4 voltmod guys

700mhz on the core is sweet.

There is. You can hardmod, or pencil. I prefer hardmod.

My card will be hardmodded to 1.5v vGPU & 2.2v vDDR tommorrow.

Shmutt · 04-26-06, 04:00 AM

Quote:

Originally Posted by Codeman05

you can use a conductive pen / paint for the Vgpu mod...many have done it already. A pencil can be used for the Vmem mod, but be extremely careful as it is not exactly an "accurate" method

Wanna ask: is it possible to "erase" the line made by a conductive pen?

crimedog · 04-26-06, 04:09 AM

Quote:

Originally Posted by Shmutt

Wanna ask: is it possible to "erase" the line made by a conductive pen?

acetone

Shmutt · 04-26-06, 04:22 AM

Quote:

Originally Posted by crimedog

acetone

as in nail polish remover? will it damage the PCB or the connection point?

crimedog · 04-26-06, 04:34 AM

fishy gave a motherboard a bath in acetone for an hour and it was fine

Shmutt · 04-26-06, 05:01 AM

Quote:

Originally Posted by crimedog

fishy gave a motherboard a bath in acetone for an hour and it was fine

LoL!

Alright, thanks!

g0dM@n · 04-26-06, 09:41 AM

Quote:

Originally Posted by {PMS}fishy

There is. You can hardmod, or pencil. I prefer hardmod.

My card will be hardmodded to 1.5v vGPU & 2.2v vDDR tommorrow.

Wake up. It's time for your mod. And throw out your stupid conductive pen!!

You should never have let a newb use that pen, Pete.

{PMS}fishy · 04-26-06, 12:37 PM

Quote:

Originally Posted by g0dM@n

Wake up. It's time for your mod. And throw out your stupid conductive pen!!

You should never have let a newb use that pen, Pete.

Won't be till tonight, things are falling apart at work, and I have to go in early.

{PMS}fishy · 04-27-06, 09:05 AM

Card is now hard modded.

g0dM@n · 04-27-06, 09:07 AM

results?

Vyel · 04-28-06, 02:39 PM

Hardmod looks hardcore...

crimedog · 04-28-06, 02:52 PM

Quote:

Originally Posted by Vyel

Hardmod looks hardcore...

it's not so bad. i double stick taped two vr's down and bent their legs onto the points, so i'm running with 1.5v and the switching frequency mod. only problem is i can't get at one of the load balancing resistors now :/

Vyel · 04-30-06, 01:40 AM

I'm a college student, make less than $10/hr, and don't have much time to work...

Can I do this without needing to descend a third testicle?

04-17-06, 06:09 PM	#1
{PMS}fishy Senior A64 Killer Join Date: Dec 2001 Location: Boston, MA	Official 7900GT Volt Mod Thread. Official 7900GT Volt Mod Thread. I think the picture speaks for itself, but a little information to avoid confusion. All that you need to do is connect one of the two points, or both to achieve an overvoltage on the card. *NO OTHER MODIFICATIONS REQUIRED* Connecting Yellow point to ground will give you +0.1v or 1.3v vGPU, can be verified at the red point marked out on the card. Connecting Orange point to ground provides +0.2v or 1.4v vGPU, can be verified at the red point marked out on the card. Connecting both the Yellow and Orange point to ground provides +0.1v & +0.2v or 1.5v vGPU. Personally I would not run more than 1.4v on stock cooling, temps will be rather high, and I wouldn't expect the card to scale well at all. It is possible to achieve 0.05v as well, but to keep this simple I have left it out. Most people will be modding to 1.4v on air, and 1.5v on water. It is also possible, with the removal of componets to achieve grater than 1.5v. I would highly suggest not going over 1.5v unless you are running water cooling at a minimum. 1.4-1.5v with good cooling should provide the ability to clock up to, or over 700mhz core on these 7900GTs. 7900GT 1.5v Hard Mod. First locate this area on the top left of the card. This is where we will be working. Once you locate that area, the resistor in the top left above u502 needs to be removed and replaced with a 50k resistor. This mod can be used in conjunction with the above 'ink' mods to increase voltage beyond 1.5v. There are also OCP resistors, and a bucket mod. I'll add those on later today. __________________ Pick 2: Speed -- Reliability -- Cost Trouble Shooting 101: 1. RTFM 2. Repeat Step 1 6ghz Club Member. cw823 Fan Club Founding Member, are you? Last edited by {PMS}fishy; 04-27-06 at 09:04 AM.

04-18-06, 12:55 AM	#2
g0dM@n Goderator... I mean Moderator Join Date: Sep 2003 Location: 20mi W of NYCity, USA	Rock on! Can't wait to see what these score when nVidia decides to start stocking like they should be!! __________________ Gigabyte 790XT Water \| Phenom II 945 @ 3.85ghz 24/7 Enzotech Sapphire CPU block \| 4GB OCZ 1600 \| 4890 1GB w/EK FC4890 LT \| 2x30GB OCZ Vertex Raid 0, WD640 black + File-Svr 6TB \| SB X-Fi Fatal1ty \| Corsair 520W Modular \| Westy 37" 1080p + Dell 2405FPW \| DDC pump with petra top @ 18w, Thermochill HE 120.3 w/ 3x120x38mm Deltas 152cfm on controller \| Xbox 360 Gamertag: g0dMAn114 My Heatware (750+ flawless) IHS Removal TutorialHotFlashing TutorialDFI NF4 UTT ProblemsFunny-ChuckNorrisFactsCustom RAM Cooler nightelph: I wanted to play so bad last night but I was OC'ing my video card.

04-18-06, 09:27 AM	#3
d94 $30 a phone Join Date: Sep 2004 Location: 48302	cant wait to see some results as im wondering if i should keep my 512mb x1800xt or get one of these __________________ Antec 300 Intel Q6600 @ 3.7 - X48-DS4 - 4gb ddr2 - 500w Earthwatt's - 52" Sharp Aquos LC-52D64U 1x 640GB WD - 2x 1TB Greenpower - 2x 400GB Seagate - ATI 4830 512mb @ 680/975 3DMark Vanage 7402 3DMark05 20,447 3DMark06 13,693 Emachines amd x2 5000+ @ 2.9ghz w/foxconn bios - 2gb ddr2 stock POS 300w - 400gb Seagate - diNovo + VX Revolution MacBook Air - 1.6ghz c2d - 2gb ddr2 - 80gb heatware

04-18-06, 09:51 AM	#4
g0dM@n Goderator... I mean Moderator Join Date: Sep 2003 Location: 20mi W of NYCity, USA	You know what I didn't even realize? I can't believe no POTs are required!! That is just SO EASY! __________________ Gigabyte 790XT Water \| Phenom II 945 @ 3.85ghz 24/7 Enzotech Sapphire CPU block \| 4GB OCZ 1600 \| 4890 1GB w/EK FC4890 LT \| 2x30GB OCZ Vertex Raid 0, WD640 black + File-Svr 6TB \| SB X-Fi Fatal1ty \| Corsair 520W Modular \| Westy 37" 1080p + Dell 2405FPW \| DDC pump with petra top @ 18w, Thermochill HE 120.3 w/ 3x120x38mm Deltas 152cfm on controller \| Xbox 360 Gamertag: g0dMAn114 My Heatware (750+ flawless) IHS Removal TutorialHotFlashing TutorialDFI NF4 UTT ProblemsFunny-ChuckNorrisFactsCustom RAM Cooler nightelph: I wanted to play so bad last night but I was OC'ing my video card.

04-23-06, 04:05 PM	#6
Alchemy1 Member Join Date: Apr 2004	What kind of temps are you guys getting when your at 1.5v and on what type of cooling? How safe do you guys think 1.5v is? I feel comfortable with 1.4v on water cooling, but I don't know about 1.5v especially with summer coming up. __________________ i7 920 D0 (4ghz @ 1.28v) l EVGA Classified l WD 300gb velociraptor l maxtor 200gb l 6gb G. Skill Trident 2000 l Cooler Master 1100 UCP l XFX GTX260SLi l Black MM Extended Ascension) l 2x PA 120.3 l 2x DDC+(355's) l Heatkiller Cu v3 l Dell 2005FPW l Gigabyte UD3R as a backup Heat "Emancipate yourselves from mental slavery/None but ourselves can free our minds " -Bob Marley

Overclockers

Internet Services

Website Development

Tech Hardware

04-23-06, 04:42 PM	#7
Codeman05 Member Join Date: Sep 2002 Location: Dallas, Tx	I'm running about 45C load at 1.5v watercooled I would also recommend putting sinks on these ICs Pic taken from the XS thread Mine were extremely hot after the mod __________________ Intel i7 920 D0 @ 4.2 GHz EVGA X58 6x 2GB OCZ DDR3 1600 7-7-7-7 2x ATI 5870 X-Fire OCZ Vertex 120GB SSD 1x 52" Samsung LCD 120Hz - 1920x1080 1x 26" Samsung LCD - 1920x1200 Heatware: 48-0-0 \| Seti Farm: 2x Q6600, 1x Q8200, 1x e4500, 1x e5200, 1x Athlon 5200, 2x 8800GT, 4x 8800GS & above rig

04-23-06, 05:45 PM	#8
soloz2 Member Join Date: Apr 2006 Location: NY	I'm getting an Asus TOP version, does anyone know if any of the memory modules are covered w/ anything that would still work w/ my waterblock? for example, I didn't have to use all my ramsinks on my 7800GT bc there was a stock heatsink I could use for 4 of them. I want to do this volt mod, but if the 7900GT doesn't have anything I'll have to use all my ramsinks on the memory and will have to buy extra for the two IC's on the back of the card. also, what is best to use, a pencil or one of those pens? __________________ HTPC: Asus A8N-SLI Deluxe, A64 3800+ X2, 2gb G.Skill ZX DDR400 , MSI 6600GT, SB Audigy2zs Gamer, Seagate 160Gb SATAII, 2x 250GB WD SATAII, DVD-RW, Hauppauge WINTV-PVR-150, Sunbeam Nuuo 550w psu, Antec P180, ViewSonic N2750w 27" LCD HDTV, Freezer64 Pro & VF900 for cooling Gaming Rig: AMD Opteron 165 CCBBE @ 2.8Ghz 1.375v, DFI nF4 SLI-DR Expert, 2gb G.Skill F1-4000USU2-2, Asus 7900GT TOP 700/1700, Modded SB X-Fi Xtreme Music, 2x Seagate 250gb 7200.10 in RAID 0, 320Gb Seagate 7200.10, Sony DVD-Rom, Plextor 16x DVD DL RW, Custom Modded CM Stacker, PC Power & Cooling Silencer 610, Custom wc: Swiftech Apogee cpu, DD Maze 4 gpu, Black Ice GT Stealth 360, T-line, Swiftech MCP655 pump, Maskterkleer 7/8" ID tubing, distilled water w/ HydrX Viewsonic 19" widescreen Audio: Modded X-fi Elite Pro > Soloz Audio Silver mini-RCA > Maxed PIMETA > Beyer DT770 Pro/80 Heatware

04-23-06, 06:53 PM	#9
four4875 Member Join Date: Jan 2003 Location: I can see walmart, 44906	seein as you have to connect to ground... i would say you need to solder on a wire. it should be a piece of cake, even for beginners. just alittle archofwire, and connect to whichever one you want to use, or you can stick it across to both if you desire the 1.5V. __________________ pc: dell P4 1.8 with 512 megs of PC133, not even an AGP slot in it. 32 meg TNT2 pwnin it up. ride: 82 k10, 31's on 3 inch susp. lift, SBC 400, TH350, NP208, 3.09 gears. quadrajet to an edelbrock intake, 0.030" milled off the heads, headers to glasspackeds, its loud and gets <10 MPG. take that, Gore.

04-23-06, 07:11 PM	#11
four4875 Member Join Date: Jan 2003 Location: I can see walmart, 44906	are the pads beside the points grounded? i figured that they werent, caus nothin was mentioned about bein able to just bridge them __________________ pc: dell P4 1.8 with 512 megs of PC133, not even an AGP slot in it. 32 meg TNT2 pwnin it up. ride: 82 k10, 31's on 3 inch susp. lift, SBC 400, TH350, NP208, 3.09 gears. quadrajet to an edelbrock intake, 0.030" milled off the heads, headers to glasspackeds, its loud and gets <10 MPG. take that, Gore.

04-25-06, 09:03 PM	#15
-aDaM^ Banned Join Date: Jan 2005 Location: CaNaDa	is there a volt mod for the memory? Also great job with the 1.4 voltmod guys 700mhz on the core is sweet.

04-26-06, 01:59 AM	#17
Highlander Member Join Date: Jul 2002 Location: UK	Slightly different to the "normal" mods, due to the this card not loving high voltages and a little more control being required. 1.5 VID "hardmod" with VR's to decrease/increase vGPU (1.37 - limited by UVP -> ~ 1.57-1.6 (limited by OVP) vDD mod, 1.9 -> 2.4v Currently card runs 660/850 on 1.415/2.03 benchable (tho totally clean) rams clean at 1010mhz w/ 2.15 vDD as well, but can't hit those speeds with high GPU speeds (yet ) __________________ .:. X2 3800 @ 2.9 (LDBHE 0601) .:. DFI SLI-D .:. 2gb Gskill HZ .:. EVGA 7900GT @ 555/910 .:. Tagan TG580 .:. Watercooled .:. .:. Dothan 750 @ 2.8 .:. P4C800 Deluxe (vDroop/vCore) / P4GD1 .:.520w & 420w Powerstream .:. Dual Phase Cooled .:. .:. X2 3800 @ 2.1 (CDBHE 0533) .:. MSI K8N Neo2 PT .:. 4*256 3200 .:. Antec 480w "blue" .:. .:. Mach 1 @ R402a/Coilmod .:. Vapo PE @ R209 .:. .:. Mods by Persivore .:. .:. Cooling by Gray Mole .:.

04-26-06, 04:34 AM	#22
crimedog Member Join Date: Nov 2003 Location: Orlando	fishy gave a motherboard a bath in acetone for an hour and it was fine __________________ 930 & P5WD2 (vcore + droop, mch vdd, ddr2 vdd) 7900gto 720/1680 2x300gb samsung spinpoint sata2 in raid0 I love to volt mod i'm packing heat

04-27-06, 09:05 AM	#26
{PMS}fishy Senior A64 Killer Join Date: Dec 2001 Location: Boston, MA	Card is now hard modded. __________________ Pick 2: Speed -- Reliability -- Cost Trouble Shooting 101: 1. RTFM 2. Repeat Step 1 6ghz Club Member. cw823 Fan Club Founding Member, are you?

04-27-06, 09:07 AM	#27
g0dM@n Goderator... I mean Moderator Join Date: Sep 2003 Location: 20mi W of NYCity, USA	results? __________________ Gigabyte 790XT Water \| Phenom II 945 @ 3.85ghz 24/7 Enzotech Sapphire CPU block \| 4GB OCZ 1600 \| 4890 1GB w/EK FC4890 LT \| 2x30GB OCZ Vertex Raid 0, WD640 black + File-Svr 6TB \| SB X-Fi Fatal1ty \| Corsair 520W Modular \| Westy 37" 1080p + Dell 2405FPW \| DDC pump with petra top @ 18w, Thermochill HE 120.3 w/ 3x120x38mm Deltas 152cfm on controller \| Xbox 360 Gamertag: g0dMAn114 My Heatware (750+ flawless) IHS Removal TutorialHotFlashing TutorialDFI NF4 UTT ProblemsFunny-ChuckNorrisFactsCustom RAM Cooler nightelph: I wanted to play so bad last night but I was OC'ing my video card.

04-28-06, 02:39 PM	#28
Vyel Registered Join Date: Apr 2006	Hardmod looks hardcore...

04-30-06, 01:40 AM	#30
Vyel Registered Join Date: Apr 2006	I'm a college student, make less than $10/hr, and don't have much time to work... Can I do this without needing to descend a third testicle?