ATI 5850/5870 voltmod thread

[largon]

i agree with largon. but shouldnt there be some kind of "control" component for the memory ? or is that all inegrated in vt243 ?

As all other Volterra converter parts (VT1165SF, 57SF, 95SF), a single converter can be controlled by a resistor network, but when there's two or more in parallel they require a dedicated controller. Those VT243WFs are "in single channel mode" as they serve different loads (MVDDC, MVDDQ). Same config can be seen on HD4890 where there are two VT242WFs. HD4870 has only one VT1165MF, for GPU VDDC, yet there are two VT1165SFs that convert MVDDC and MVDDQ. Those VT1165SFs both have an external resistor networks to control them.

[AlexUnwinder]

MSI Afterburner works but it up's the UVD clock voltage, not the 3d clock voltage

What are default 2D/3D/UVD voltages on your card? Can you please run MSI Afterburner with /i2cd,70 command line switch to capture state of your VT1165 and post it here? If different power state voltage is edited on non-reference board, it can be easily fixed by modifying the database (I'll be able to post the instructions on modifying it after seeing the I2C dump).

[NapalmV5]

vgpu mod offers limited gains thanks to ocp

if someone posts an ocp mod for 5870 it may get me interested in getting 5870

[jaredpace]

Where did you find these?

http://www.xfastest.com/viewthread.php?tid=31255

[gareth170]

What are default 2D/3D/UVD voltages on your card? Can you please run MSI Afterburner with /i2cd,70 command line switch to capture state of your VT1165 and post it here? If different power state voltage is edited on non-reference board, it can be easily fixed by modifying the database (I'll be able to post the instructions on modifying it after seeing the I2C dump).

2d= 1.038v, 3d = 1.088v, UVD=1.00v.

with the new MSI Afterburner 1.2.0 its working fine now.

[chispy]

Anyone know the V.Mem voltmod ?

[R3DCrocker1]

Come on guys, show the love and share the OCP mod

Please!

[R3DCrocker1]

http://www.benchblogs.net/?p=115

found that, can any one confirm that it works cause it looks a little shady

[benko]

does 5850/70 suports softmod for both gpu and mem?

[CL3P20]

http://www.benchblogs.net/?p=115

found that, can any one confirm that it works cause it looks a little shady

Interesting...but why 18k resistor ...? That resistor measures at 4.08k Ohms...and does not have a direct connection to ground...

[crustytheclown]

HA HA HA
ocp?
ovp?
no no no...
we are talking about ati here guys
oh check this...

http://www.youtube.com/watch?v=GIInT13Nqcc

(wanna see full video?)

[EtheEnthusiast]

HA HA HA
ocp?
ovp?
no no no...
we are talking about ati here guys
oh check this...

http://www.youtube.com/watch?v=GIInT13Nqcc

(wanna see full video?)

Nice mod

can anyone help me with unlocked softmod tool?

[kiwi]

W1zzard, Is that successor of ati tool? Damn I miss ati tool, used to be my favorite gpu oc proggie

[nickless]

HA HA HA
ocp?
ovp?
no no no...
we are talking about ati here guys
oh check this...

http://www.youtube.com/watch?v=GIInT13Nqcc

(wanna see full video?)

Very nice, but we want to see also - "How It's Made" like on Discovery Channel

[EtheEnthusiast]

Got it

[Mod_Aap]

http://www.benchblogs.net/?p=115

found that, can any one confirm that it works cause it looks a little shady

Interesting...but why 18k resistor ...? That resistor measures at 4.08k Ohms...and does not have a direct connection to ground...

OCP mod works. Depents on the card if it helps with overclocking though.
This will give you around 3A per phase extra, which is 12A in total. So not much but just enough for that extra push.

Higher OCP is not possible because of the design of the volterra chip.

[CL3P20]

some pics of GPU ready for shipping..

Added total of 8x electrolytic caps and 8x SMD caps..OCP mod ready for VR as well. I installed vmeasure points for input and all output voltages as well




..hoping for good results..this will be benching on LN for entry to Kingpin's comp *fingers crossed*

[CL3P20]

I have not figured the mod for GPUv yet..but havent got much time to play with the GPU under power either.

For finding the mod, we need to locate the point around the GPUv controller that changes resistance, when softmodding the voltage...

ie- measure everything for resistance around the control IC at stock...then use software to increase voltage...shut GPU down..repeat resistance check, looking for changes..

I have only mod'd for OCP..the rest of the mods are all capacitors.

[Theorw]

I have not figured the mod for GPUv yet..but havent got much time to play with the GPU under power either.

For finding the mod, we need to locate the point around the GPUv controller that changes resistance, when softmodding the voltage...

ie- measure everything for resistance around the control IC at stock...then use software to increase voltage...shut GPU down..repeat resistance check, looking for changes..

I have only mod'd for OCP..the rest of the mods are all capacitors.

Now would that about the crosschecking before and after voltage change be the same for every i2c controllable IC?
I mean i.e for my 5770???
Also where are the SMD caps u added?

[CL3P20]

1. Now would that about the crosschecking before and after voltage change be the same for every i2c controllable IC?
I mean i.e for my 5770???
2. Also where are the SMD caps u added?

Yes..when you change voltage via software, it seems only the 'FB' is being changed..and not the VID..as we know that changing VID also changes OCP. It stands to reason, that if only the FB pin source is being altered..then it will be the only point that has changed from stock value, once voltage has been changed....

As for the SMD caps..they are on the front side of the GPU, in the first ...on the row of SMD's closest to the copper sinks..I piggy-backed them to the existing ones...

*the 5870 has 4x input power phases for GPUv...with dual-phase ouputs..making a total of 8x output power phases for GPUv.

[Theorw]

So if i get this right in my 5770 i should write down all the values that are connected with the FB leg of my cards I2C chip and then measure again after having changed the colts via software right????????

And for OCP mod u need to find and change the VID right?

[Theorw]

As for the SMD caps..they are on the front side of the GPU, in the first ...on the row of SMD's closest to the copper sinks..I piggy-backed them to the existing ones...

I saw them...Where did u find them?Scavenged from dead cards?How do u know their capacity and voltage?
And why didnt u solder them in the empty spots that exist there and solder them in the existing caps instead?

[Astennu]

I have not figured the mod for GPUv yet..but havent got much time to play with the GPU under power either.

For finding the mod, we need to locate the point around the GPUv controller that changes resistance, when softmodding the voltage...

ie- measure everything for resistance around the control IC at stock...then use software to increase voltage...shut GPU down..repeat resistance check, looking for changes..

I have only mod'd for OCP..the rest of the mods are all capacitors.

What kind of gains do you get from the cap mod ? and doe they also help on default voltages ? or is it more effective when you are running v-mods ?

[CL3P20]

I saw them...Where did u find them?Scavenged from dead cards?How do u know their capacity and voltage?
And why didnt u solder them in the empty spots that exist there and solder them in the existing caps instead?

I used some from old GPU's I have fried...and landing them to the empty pads is actually more difficult..the solder on the pads is freakin hard as hell..and doesnt play nice....its muchmuch easier to piggyback.

What kind of gains do you get from the cap mod ? and doe they also help on default voltages ? or is it more effective when you are running v-mods ?

Well I was told the mem caps have made a noticeable improvement...the GPU was passed to the owner last night..and he made some prelim runs..at 1132/1400 @ 1.35v with i7 @ 4.52 ghz...wont really know about GPUv until he starts benching on LN with 1.4+ GPUv... Results are coming soon..

[Barr3l Rid3r]

I used some from old GPU's I have fried...and landing them to the empty pads is actually more difficult..the solder on the pads is freakin hard as hell..and doesnt play nice....its muchmuch easier to piggyback.




Well I was told the mem caps have made a noticeable improvement...the GPU was passed to the owner last night..and he made some prelim runs..at 1132/1400 @ 1.35v with i7 @ 4.52 ghz...wont really know about GPUv until he starts benching on LN with 1.4+ GPUv... Results are coming soon..

Thats w/out vmem? Do you think OCP makes any difference w/ 1.35V only?

Thats what I've done for now: