vmods for ASRock K8Upgrade-NF3

[dokar]

…::: Standard vcore mod on K8Upgrade-NF3 :::…

This mod increases the vcore to 1.575 V.

You have to short C293 and C652 resistors near the L6711 chip.

http://www.freeweb.hu/asrocktuning/index_elemei/image002.jpg

http://www.freeweb.hu/asrocktuning/index_elemei/image005.jpg


…::: Advanced vcore mod on K8Upgrade-NF3 :::…

This one I a bit tricky. The L6711 provide an overvoltage protection that will automatically shutdown the computer if the voltage

sensed is x% higher than the programmed one (VID code).

My first attempt with that mod wasn’t a success... when I’m was pushing the vcore any higher than 1.62V, the board refused to boot

or shutdown before loading into windows. I then investigate and found this in the datasheet:"VoltageIdentificationPins(VID)They are

used to program the output voltage... together with VID_SEL and to set the OVP/UVP protection thresholds accordingly".

Then the idea was to combine both mod to raise that threshold... and it works.

First you need to do the VIDpin "Standard vcore mod" - shorted C652 & C293

Then take a good 100k Ohm variable resistor, set it to maximum, and add it beetween Adv.vcore & ground point.

http://www.freeweb.hu/asrocktuning/index_elemei/image006.jpg

Power on the board and start changing the voltage by slowly lower down the resistor, oh and better test with multimeter on the coil,

don’t trust what CPU-Z or BIOS is telling you.

http://www.freeweb.hu/asrocktuning/index_elemei/image008.jpg

http://www.freeweb.hu/asrocktuning/index_elemei/image008.jpg

I didn’t have a 100k vr so I had to put many resistors in series. The pic here show another way to a ground, which passes through the

ATX connector retention clip. Any way you get the resistance to the ground is good.
Now the overvoltage protection threshold is raised at ~1.72V.

[Albatroner]

So what maximum stable FSB you got out of the Board with what voltages and what CPU?

THX
Alba

[dokar]

So what maximum stable FSB you got out of the Board with what voltages and what CPU?

THX
Alba

350MHz (HT:3x) with Athlon 64 3000+ @ 1,608V (standard vcore mod; I measured with DMM)

[dokar]

…::: Standard vDimm, vAGP and vChipset mods on K8Upgrade-NF3 :::…

By default the board send 1.74V for AGP at BIOS Auto or High, and send 1.68-1.69V to chipset (no BIOS option available for this as you know).

Add a variable resistor beetween respective mod pin and ground & lower down the resistance for more voltage, as usual. Btw... any ground

on the board is good, no need to use the one I've marked on the pic.
Suggested values of resistance for vAGP & vChipset are UNKNOWN.

http://www.freeweb.hu/asrocktuning/index_elemei/image010.jpg

For Dimm voltage I discoverred the board send "only" 2.61V at BIOS Ultra-High, really that's not enough!
Suggested value for resistance to apply : 560 Ohm
Result at Ultra-High : 2.83V
Lower down the resistance for more voltage.


…::: 3.3V vDimm mod on K8Upgrade-NF3 :::…

If you need more voltage, you can route an orange wire (3.3V) from your ATX Power Connector and connect it to the missing capacitor near

the blue ide connector. Don’t use a too thin wire.

If you did the previous vDimm mod, remove it before doing that one you'd also want to create

the jumper on the backside of the board for a cleaner job.

http://www.freeweb.hu/asrocktuning/index_elemei/image009.jpg

[Albatroner]

Is there any mod, to give more than 3,3V? I would like to have 3,6V!
Should I put some heatsinks on special chips?
When the Board is fully modded: Would it be suited for heavy ocing with a Sempron64 2800+ (8x Multi)?

Sorry, if my English is not 100% correct.

Thanks
Alba

[Albatroner]

With what Voltage on Chipset and AGP Bus you reached the best overclock?
Any other tricks so far for clocking the Board higher?
I also bougth such a Board, and will mod it.

Regards

[Albatroner]

Do you know, where to measure the V-Core on the Board?
My Board refused to but with any V-Core higher than 1,7V, but I would like to give 1,75V or better 1,8V more! But how exactly?

And I already give 1,86 V-Chip! How far would you go, in case not to damage the Board...

I am cooling with a little one stage compressor, and have a fan on the NB.

I realls would be happy, if you could held me.

Sorry, if my English is not that good

Regards
Albatroner