Discussion in 'RivaTuner Advanced Discussion forum' started by blow, Mar 25, 2008.

1. ### blowMember

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I'm reading this datasheet, here there aren't a beautiful function like DC%=...
So, i think a function that governate DC%(and the graph at page 41-42) is:

DC%=minDC%+170*(maxDC%-minDC%)*(T-Tmin)/Trange

where Trange is that wich in datasheet is called "effective Tange" at page 40.

Trange=(maxDCdecimal-minDCdecimal)*Tr/170

where Tr is Trange not effective.

Whit rivatuner i have this parameters:
minDC=45
maxDc=100
Tmin=45
Trange=26
------------- To set auto Tmin to off -------
Toperating=150
Tlow limit=0
Thight limit=150

The problem is if i draw graph(DC% / T) with this data i find a function that don't follow the real trend of DC% for T.

I have 45% until my temp is under 55°C instead 45% untile temp is under 45°C(like graph).

I have some question for Unwinder:
1)Trange in rivatuner i effective Trange or Tr?
2)DC in rivatuner are %percent or decimal?
3)Do you think this function is accurate or wrong?

Last edited: Mar 25, 2008
2. ### UnwinderModeratorStaff Member

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I think that you've to reread the datasheet carfeully. RT displays units when you select a parameter, and duty cycle unit is %. And finally, search really does the magic, so use it.

3. ### blowMember

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Trange in RT is effective or not?

4. ### UnwinderModeratorStaff Member

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Use search please! This thing (I mean search function) is effective for sure.

5. ### blowMember

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Im thinking my assumption is good, but my error is to use nvthermaldiode instead ADT7473.dll to monitoring core temperature...:bang:

Here
use this formula for Trange:
TR=2/3*(Tmax-Tmin)/(Dmax-Dmin)

Im using(according whit datasheet) this:

Tr=Trange*170/(maxDC-minDC)
where TRange is Tmax-Tmin and max/minDC is in decimal(0-255)

mmmm...

Last edited: Mar 25, 2008
6. ### blowMember

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Ok, all is correct, the different in two formulas is that im using decimal(0-255) for DC and ribbel use (0-1) but both have the same result.
Good, now all work.

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