RivaTuner plugin supporting GT2xx and HD4870 Voltage Tuning

[largon]

mikeyakame,
I haven't seen a single VID controller that has a fixed OVP. And I can't see how it would even make sense to have VIDs that are higher than OVP trigger voltage?

[BertM]

i got a green pcb 4870 1gb card with black cover and heathpipe system.
"unable to detect VT1165 ...."

[sch3ll3p3ll3]

Tried in Vista64 and XP does not show any voltages for card, or increase voltage. Single GTX 260

I have exactly the same problem on a SAPPRIHE 4870 512MB. Any one know how to fix it?

[mikeyakame]

mikeyakame,
I haven't seen a single VID controller that has a fixed OVP. And I can't see how it would even make sense to have VIDs that are higher than OVP trigger voltage?

Intersil ISC6327 VR used on 260/285 shrinks uses this kind of OVP as safety. It has a preset of 2.0v if using recommended resistance, but it is upto the vendor who implements it to set it differently if they want. It also uses offset value above VID of +125mV as soft OVP with recommended design.

[mikeyakame]

I have exactly the same problem on a SAPPRIHE 4870 512MB. Any one know how to fix it?

I'm helping fgw look into its since I have same problem. He hasn't got a 64bit OS on his system to troubleshoot unfortunately. But rest assured its being looked into and fixed

Once its fixed there will be an updated dll available, things like this happen when API libraries get updated and small changes break previous usage

[[XC] Hicks121]

Tried this on my EVGA gtx260 55nm....didnt work....

Time to break out the solder iron.

[Hardass]

I'm helping fgw look into its since I have same problem. He hasn't got a 64bit OS on his system to troubleshoot unfortunately. But rest assured its being looked into and fixed

Once its fixed there will be an updated dll available

Thanks, but mine does not work on XP 32bit either.

[mikeyakame]

Tried this on my EVGA gtx260 55nm....didnt work....

Time to break out the solder iron.

Even though it's been said on the current thread page and many times in the past...

260 55nm and 285 55nm shrink were fitted with a cheaper 4-phase InterSil VR that doesn't have programmability like the Volterra VT1000 series. They saved NV money and cost the customers full software programmable voltage adjustment.

There is a soft OVP in the datasheet mentioned of 125mV or 0.125v, whether NV stuck to this design value or used a larger VID offset for OVP it's unknown. Let us know if you reach OVP and at what point if using an adjustable pot.

[mikeyakame]

Thanks, but mine does not work on XP 32bit either.

In Rivatuner 2.22\Monitoring\Plugins, you will find a VT1165.log file, paste me the contents in a private message if you like so I can see the debug info.

[Hardass]

In Rivatuner 2.22\Monitoring\Plugins, you will find a VT1165.log file, paste me the contents in a private message if you like so I can see the debug info.

Sent. And Thanks.

[largon]

Intersil ISC6327 VR used on 260/285 shrinks uses this kind of OVP as safety. It has a preset of 2.0v if using recommended resistance, but it is upto the vendor who implements it to set it differently if they want. It also uses offset value above VID of +125mV as soft OVP with recommended design.

I can't seem to find any reference to such 2.0V limit.
But even if there was such a limit, it wouldn't matter as max VID is 1.6V.
And I don't even see the point such 2.0V limit as the offset voltage trigger (VID+175mV) will always cause OVP event before the 2.0V trigger.

[dinos22]

guys is it possible to change GFX card RAM voltage with this software

[mikeyakame]

I can't seem to find any reference to such 2.0V limit.
But even if there was such a limit, it wouldn't matter as max VID is 1.6V.
And I don't even see the point such 2.0V limit as the offset voltage trigger (VID+175mV) will always cause OVP event before the 2.0V trigger.

IOUT - IOUT has the same output as IDROOP with
additional OCP adjustment function. In actual application, a
resistor needs to be placed between IOUT and GND to
ensure the proper operation. The voltage at IOUT pin will be
proportional to the load current. If the voltage is higher than
2V, ISL6327 will go into the OCP mode, this means it will
shut down first and then hiccup. The additional OCP trip
level can be adjusted by changing the resistor value

It's a form of OCP based OVP.

[mikeyakame]

guys is it possible to change RAM voltage on these

Don't believe so mate. Old fashioned way of increasing Vddr seems the most plausible method.

I'm pretty certain Unwinder has said there is no programmable interface to GDDR VR that he knows of.

[ZoLKoRn]

Thank you for sharing the great tool

[swale]

Tried in Vista64 and XP does not show any voltages for card, or increase voltage. Single GTX 260

me niether

is there not a way of getting this to run on x64 (need idiots guide)

[largon]

IOUT - IOUT has the same output as IDROOP with
additional OCP adjustment function. In actual application, a
resistor needs to be placed between IOUT and GND to
ensure the proper operation. The voltage at IOUT pin will be
proportional to the load current. If the voltage is higher than
2V, ISL6327 will go into the OCP mode, this means it will
shut down first and then hiccup. The additional OCP trip
level can be adjusted by changing the resistor value

It's a form of OCP based OVP.

That is OCP. Absolutely nothing to do with OVP, mosfet output voltage, sensing nor limiting it.

[nickless]

Do me favor if you have Everest installed.
...
Would someone with a GTX 285 care to do the same as well for me.

Thanks.

Here is the dump file from GTX 285. If you can do something you will be the best.

[NapalmV5]

Even though it's been said on the current thread page and many times in the past...

260 55nm and 285 55nm shrink were fitted with a cheaper 4-phase InterSil VR that doesn't have programmability like the Volterra VT1000 series. They saved NV money and cost the customers full software programmable voltage adjustment.

There is a soft OVP in the datasheet mentioned of 125mV or 0.125v, whether NV stuck to this design value or used a larger VID offset for OVP it's unknown. Let us know if you reach OVP and at what point if using an adjustable pot.

1.26vcore - os boot
1.27vcore - no os boot



most im able to get via the vid pins is high 1.25vcore low 1vcore

[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.

anyone pin point out the exact resistor?

ill hunt it down

alright what resistance would that resistor be ?

1k ?
26.6k ?

[Sly Fox]

^^^^And thus this topic has officially gone WAY over my head.

[fgw]

guys is it possible to change GFX card RAM voltage with this software

afaik, there is no way to change RAM voltage by software. voltage for RAM is at least not controlled by the vt1165!

[fgw]

to everybody out there having problems with my plugin on single gpu setups:

i developed this software on a system with a gtx295 and think i'm handling single gpu setups incorrectly!

give me a short break to verify this. if my assumptions are correct i might come out with a fix by tomorrow!

[warmaster]

WTG m8

[swale]

pleas epleas eplease can you do a x64 fix please