A8R32-MVP what is it

leethaxor4u said:
Do you guys know that all those setting inside htt config page in the bios do? If so would you mind sharing your info?
Click to expand...


id like to know that too.. particularly 'RD 580 HT PLL Control'
might have a tamper later an see how it effects things.
 
powned said:
id like to know that too.. particularly 'RD 580 HT PLL Control'
might have a tamper later an see how it effects things.
Click to expand...


A phase-locked loop (PLL) is an electronic circuit with a voltage- or current-driven oscillator that is constantly adjusted to match in phase (and thus locked on) the frequency of an input signal. PLLs are used for frequency control. They can be configured as frequency multipliers, dividers, demodulators, tracking generators or clock recovery circuits.

On a computer motherboard a PLL is used to generate several frequencies that are required for proper operation:


Let's try to build our own PLL: What we want is a stable frequency that we can change on the fly.
A crystal oscillator would give us a stable frequency- but it's fixed and using several oscillators would be a waste of resources.
If we use a VCO (Voltage Controlled Oscillator) we get a freely changeable frequency but the frequency would change even at the slightest variation of voltage. If there was a way to combine the stability of the crystal oscillator with the flexibility of the VCO we would have the perfect solution for our problem.

What if we add a phase detector? A phase detector is a device that takes two signals. If both have the same phase and frequency the output is zero. If the signals are out-of-phase the output will be a DC voltage that is proportional to the phase difference between the two inputs.



What does this do? The crystal generates a frequency of 10 MHz in our example. This frequency gets fed to the PD. The VCO output is zero right now so the PD output is high because the frequencies differ a lot. The PD output gets fed into the VCO and generates a frequency. This goes back to the PD and so on - eventually the VCO will lock onto the frequency of the crystal. And the output of the VCO will be 10 MHz. This is a basic PLL circuit.
Now you ask where's the flexibility? What we have right now is equivalent to a crystal oscillator!

Let's see.. We want an output of 20 Mhz for this example. What we do now is add a divide-by-two counter between the VCO output and the PD. This 'tricks' the PD into thinking our output frequency is only the half of what it really is- so it starts regulating the voltage to the VCO. Voila 20 MHz. If we used a programmable divider here we could change frequencies on the fly.



Now we can multiply frequencies by integer values. But how can we multiply our frequency by fractional values or divide it?
For example we want 10 Mhz x 3.5 for an output of 35 Mhz. This is done by adding another pre-divider [whats the correct term here?] between the crystal and the PD. In our example we could use a pre-divider of 2 and a divider of 7. Our output would be 10 Mhz / 2 * 7 = 35 MHz.

This is our PLL in all its goodness:


The added loop filter is not required for general understanding. It's here for completeness. The loop filter is designed to match the characteristics required by the application of the PLL. For example, it determines how fast the signal frequency can change and still maintain lock. This is the maximum slewing rate. The narrower the loop filter bandwidth the smaller the achievable phase error. This comes at the expense of slower response and reduced capture range.

I read about it here: Not sure if link is allowed, but hey I never found info at this forum so i did a google search.

http://www.techpowerup.com/articles/overclocking/28

It has pictures too to show what it does.

I never adjusted this at all for my build, as there us no need to.
 
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Hey guys,

Bit quite round here :D

Anyway, i just took advantage of the OcUK Specials and picked up an X1900 Master Card and im going to install it shortly

After testing everything is ok , i will eventually put it in the loop of the Reserator +1 and see how it goes paired up to the X1900XTX
 
I can score 9101 in 06 with crossfire mode enabled...this is without any overclock to my system.

With an overclock of 2.8 I can score mid 9`s :D

BTW.. I use Corsair XMS DDR400 PC 3200c2 (2gig)....Looking for new ram, any suggestions
 
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leethaxor4u said:
I can score 9101 in 06 with crossfire mode enabled...this is without any overclock to my system.

With an overclock of 2.8 I can score mid 9`s :D

BTW.. I use Corsair XMS DDR400 PC 3200c2 (2gig)....Looking for new ram, any suggestions
Click to expand...

I hit 11404 in 3dmark 05 and i running one card.
I hit 5117 in 3dmark 06

Using 6.3 drivers

All this at the setup I have in my signature are these good scores.
 
Alabno

Welcome

Your Sig is to big four lines only Please read the FAQ

Plagerism is a word, Please give credit for your post to the original author


good luck with the OC

Coolasmoo

just ordered a reserrator to get the temps under control ,BTW zalman have a new coolant addative coming out shortly
 
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HI,

I have 1900xtx and 1900 master in xfire, can get just over 15000 in 3d mark 05 with my system oc'ed.

managed 2.7ghz 10X multiplier, 3-3-3-8 @1T, 800mhz htlink with this board today, my new one should arrive tommorow, will see if it's any better than this one.

Raja
 
lordedmond said:
Alabno

Welcome

Your Sig is to big four lines only Please read the FAQ

Plagerism is a word, Please give credit for your post to the original author


good luck with the OC

Coolasmoo

just ordered a reserrator to get the temps under control ,BTW zalman have a new coolant addative coming out shortly
Click to expand...

It allows you to have up to 500 characters. Therefore I am within specifications.

If you read my post above with that link in it. It states I read it at that place.
 
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raja said:
HI,

I have 1900xtx and 1900 master in xfire, can get just over 15000 in 3d mark 05 with my system oc'ed.

managed 2.7ghz 10X multiplier, 3-3-3-8 @1T, 800mhz htlink with this board today, my new one should arrive tommorow, will see if it's any better than this one.

Raja
Click to expand...
Hope you got it at the new price :D Good luck , hope to get a lot more out of this setup when the temp is down 95 deg C on the gfx and 55 on the cpu stock :eek:
 
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