RivaTuner plugin supporting GT2xx and HD4870 Voltage Tuning

[Mysterfix]

This is pretty awsome! Thanks for the massive effort here bro. I'm not having any luck with this on my 4870 either but I'm sure you'll get figured out soon.

[NapalmV5]

fgw,

Shall do that mate and get back to you.

I just finished reading and re-reading the Intersil ISL6327CRZ multiphase closed-loop feedback and compensation PWM Voltage Reg datasheet, the VR used by NV in the die shrink G200 reference cards, GTX 260 55nm and GTX 285 55nm.
Seems NV screwed you guys over with VR cost cutting this time around, mind you the IC itself only costs $5usd or so.

It's a VR designed with cost savings and affordability in mind so it lacks any kind of external low-pin count bus interface accessibility and relies on the pcb designer to set up all the necessary operational values in design and testing phase. There are 8 VID pins which when pulled up the base VID is read by which pins are 0 or 1 and converted to digital signal by DAC. '

Voltage adjustment is done through current offset via the OFS pin, which is polarity dependant for negative or positive offset, switch to Vss (gnd) for neg, switch to Vcc (vin) for pos. Offset is configured through external resistors connected between the DAC and REF pins, the impedance dynamically controls the current which in turn determines the Vout (voltage out).

Long story short, unless NV have some kind of low pin count programmable interface to adjust a pull up or pull down resistor connected between DAC digital VID signal pin and REF voltage reference pin there is absolutely NO CHANCE AT ALL to control Voltage Adjustments via software on either the GTX 260 55nm or GTX 285 55nm. The only way would be to change the resistor between DAC and REF pins, to give a greater current offset to drive Voltage out higher.

If EVGA is saying it is possible on their cards, short of physical changes to the NV reference cards to add this basic functionality I can't see how it is possible at all. I read over the datasheet a good 4 or 5 times just to make sure I completely understood the electrical design and don't see any way to do it.

lower resistance @ the 1kohm resistor dac/ref might lead to the back of the card lowers vcore.. higher resistance doesnt allow os boot @ 1.33vcore

suggestions?

[fgw]

pleas epleas eplease can you do a x64 fix please

The plugin should work on w7 x64 and a gtx295. Are you using a gtx295?

[mikeyakame]

fgw,

Once I finish writing up my helper code in C for managing the I2C device lists , transactions and debugging you can add it in if you want. Since no point both of us writing same plugin differently

[Protocol_48]

mikeyakame,

I tried using that new evga voltage tuner, it was an early patched version that worked with all cards, turns out it was buggy and when I pressed the default settings button it put my gpu voltage to 2.0v..

I did notice straight away as I was running rivatuner's monitoring graph and restarted my pc.. It rebooted fine everything seems ok but do you think even a few seconds at 2.0v would have damaged the card's circuitry? I mean could it have caused physical damage which could get worse If I tried overclocking at all in the future? I knew I should have stuck to rivatuner..lol

[mikeyakame]

Thats the problem with simple slider tools like EVGA are offering. Rivatuner method is a bit more work, but at least you know what its doing.

Personally I think that with this of feature a lot of checking needs to be done, and some user monitoring. It becomes easier when you see this to understand Unwinders decision to not include GUI functionality for such a feature. He honestly doesn't want users who don't know what are doing frying their expensive hardware, as he knows they will do it and will feel responsible because he made it easily available.

[swale]

Ok so I got it working...but whats the max safe voltage for my gtx295???? for 24/7 stock cooling!

For the people with x64 where it hasn't came up automaticaly all I Done was followed the guide but I had to manualy allow the plugin by going into rivatuner hardware monitor, setup, plugins find vt1165.dll in the list and click the tick all will then become apparent.

[fgw]

to everybody who had problems with the plugin on single gpu systems:

uploaded a new fixed version of the plugin!

this version fixes a bug in my code which prevented the use of the plugin on systems with a single gpu!

everybody using a single gpu should download this fixed version!

download location is unchanged and can also be found in the first post of this thread!

pls report back!

[mikeyakame]

working mate.

i'll throw you a line once I finish up all the accessor structs, custom malloc handler, pci vendor id checks and all that.

[sch3ll3p3ll3]

It's working for me to (sapphire 4870 512MB & vista x64). Thank u for the effort.

[Mysterfix]

It's working on my 4870 1gb now.

I also noticed if you want to change 3D voltage you have to put your card in 3D mode before you up the voltage. I used ATI tool artifact scanner to force 3D mode then up the voltage and after you exit 3D mode your voltage should return to default levels (1.2v 2D) while keeping your new voltage in 3D mode.

[Hardass]

Working on single GTX 260 now. Thank you very much.

[swale]

FGW,

Great Program, Thanks for takeing the time to do all this.


Do you know how much extra voltage is considered ''safe---ish '' for 24/7 general usage with a bit extra uummpphh???

[fgw]

I also noticed if you want to change 3D voltage you have to put your card in 3D mode before you up the voltage. I used ATI tool artifact scanner to force 3D mode then up the voltage and after you exit 3D mode your voltage should return to default levels (1.2v 2D) while keeping your new voltage in 3D mode.

yes, thats the way it works.

it changes the voltage for the mode you are currently in!

good to mention it once more for everybody who missed this in my first post!

Do you know how much extra voltage is considered ''safe---ish '' for 24/7 general usage with a bit extra uummpphh???

no, unfortunately i have no idea as nvidia is not supplying specs for their processors. so we are at our own and need to wait for experiences of other users.

[Nizzen]

The "more" option in the monitor is grey for me. I have a 4870 512 and Vista 64.

[fgw]

The "more" option in the monitor is grey for me. I have a 4870 512 and Vista 64.

screenshot please ...

[Solus Corvus]

The "more" option in the monitor is grey for me. I have a 4870 512 and Vista 64.

You may have to manually load the VT1165 plugin, I did. The VT1103 plugin will display some similar graphs but the more button is greyed out.

[Protocol_48]

FGW,

While testing an overclock I'm getting a regular voltage spike according to your vt1165 plugin but rivatuner's vt1103 plugin is not detecting it, any ideas?

[Nizzen]

Tnx, its working

Botton line:
Sapphire 4870 (one RED and one BLUE pcb) on vista 64bit, works like a charm

Thanx! Then it is working

Remember to put this to the "hard" thing to the first page

[Telperion]

I'm using this card:

ASUS Radeon HD 4870 EAH4870 DK/HTDI/1GD5

And I'm getting the Unable to Detect VT1165 error. As far as I know this is a reference board other than the aftermarket cooler.

Any ideas?

[DMH]

Hum no still isn't working for me

[V2-V3]

OMG, I am soooo happy to see this!

will make it much easier to push the envelope with OCP/OVP!

[initialised]

No working for my Gainward 4870x2 R700 GS GLH
It says Data Provider VT1103.dll:0:0 instead of VT1165

[fgw]

FGW,

While testing an overclock I'm getting a regular voltage spike according to your vt1165 plugin but rivatuner's vt1103 plugin is not detecting it, any idea

as i can see in the screenshot, you have both plugins (vt1103 and vt1165) active at the same time.

this is from RivaTuners V2.10 Revision history:

Please take a note that Volterra voltage regulators are rather sensitive to frequent polling and may return false data under heavy load, so it is not recommended to use VRM monitoring in daily monitoring sessions.

as regular polling of the vt1165 might already return false date, i can imagine, have it polled by two plugins wont help much! i assume this is simply one of this false results returned by the vt1165 under heavy load.

try to disable the vt1103 plugin and see if the spikes go away!

you can further reduce polling rate by also disabling all datasources supplied by the vt1165 plugin you are not really interested in.

interested in your results!

[fgw]

I'm using this card:

ASUS Radeon HD 4870 EAH4870 DK/HTDI/1GD5

And I'm getting the Unable to Detect VT1165 error. As far as I know this is a reference board other than the aftermarket cooler.

Any ideas?

if you get this, you are out of luck! the plugin was not able to detect a vt1165! assume, this card is using a different controller ...



DMH

are you using the updated plugin? pls pm me your logfile: YOUR_RIVATUNER_INSTALL_DIRECTORY\PlugIns\Monitorin g\vt1165.log



initialised

go to setup -> plugins and disable the vt1103 plugin and enable the vt1165 plugin!