V Mod ABIT IX38 QUAD GT

[Johnny Bravo]

btw i still dont understand if we need more vpll?which andre said it was ichIO ?

No I don't believe the two are related as ICHIO voltage is connected with the SB not the cpu. the VPll voltage is directly associated with the cpu and its voltage is generated from a different circuit

[Brandybuck]

Johnny ,

I tried b06 and b09 and this two bios vcore settings 2.11v ok but not up to 9x multi with QX9650

Only beta bios02 working up to 9x multi

[jcool]

No I don't believe the two are related as ICHIO voltage is connected with the SB not the cpu. the VPll voltage is directly associated with the cpu and its voltage is generated from a different circuit

Ok so the IX38 hasn't got VPLL setting in bios, right?
What's it needed for, max FSB?
I think I'll pass on the mods... for now. Vdroop is 0,03 with my quad - I can very well live with that
Anyways, great work there Johnny!

[Johnny Bravo]

Johnny ,

I tried b06 and b09 and this two bios vcore settings 2.11v ok but not up to 9x multi with QX9650

Only beta bios02 working up to 9x multi

Brandybuck can you try this:

http://www.xtremesystems.org/forums/...&postcount=677

[Johnny Bravo]

Ok so the IX38 hasn't got VPLL setting in bios, right?
What's it needed for, max FSB?
I think I'll pass on the mods... for now. Vdroop is 0,03 with my quad - I can very well live with that
Anyways, great work there Johnny!

no there is no BIOS control for vPLL and it's been shown to help with FSB limits (along with CPU VTT)

Thanks for the kind words

john

[jcool]

Just flashed your "final" bios 12 btw, works great
I got my Q6600 priming@480 FSB so far... however the magical 500 seems to be out of reach. Can bench@495 but not even get a CPU-Z@ 500. Oh well, I guess it's the CPU - but maybe the VPLL mod helps. Hmmm...

[Brandybuck]

I tried official bios 12 but still not uo to 9X multi , but ıf I enable all cpu features (speed step) , change multi up to 9X . Cpuz shows normaly 6x but under load change 12x

[Johnny Bravo]

I tried official bios 12 but still not uo to 9X multi , but ıf I enable all cpu features (speed step) , change multi up to 9X . Cpuz shows normaly 6x but under load change 12x

This is very perplexing I'll have to check this with abit as it's a major issue if it's broken again

[Johnny Bravo]

CPU VTT Mod

[Brandybuck]

Thank you jhonny ı will try

[Brandybuck]

Jhonny , is it vcore mod? or only CPU VTT higher up to 1.5V

[Johnny Bravo]

Jhonny , is it vcore mod? or only CPU VTT higher up to 1.5V

CPU VTT mod is a few posts up

Vcore mod is a little more difficult but I will see what I can do.

[R*r]

thanks for the vtt mod will try as soon got time btw does the reading on the bios real for the vtt?or we have to make another read point on the board?

[Johnny Bravo]

It's reasonably accurate

[R*r]

ive just try to find other point that easier for me and found this point



mark with black arrow marker.

please tell me that the point are good enough then i can solder from there to ground

[Brandybuck]

Johnny , I'm waiting your vcore mod for up to 101k

This score only 1,88v with Abit , I know over 2v vcore up tu 5600mhz benchable

[zbogorgon]

anyone knows Vcore and CPU VTT read/measure point ?


p.s. I found CPU VTT read and on my motherboard 50k VR is not a good Idea. I was wondering why mod doesn't work and now I have got my anwser. It's more like 500 ohms VR than 50k

[Razer]

Any vdimm mods?

What bios would you recommend to use on this board?
I saw a few modded on Clunk.org forums, but dont know which one should I use.

Thanks.

And Johnny Bravo, nice work, keep up

[Johnny Bravo]

anyone knows Vcore and CPU VTT read/measure point ?


p.s. I found CPU VTT read and on my motherboard 50k VR is not a good Idea. I was wondering why mod doesn't work and now I have got my anwser. It's more like 500 ohms VR than 50k

Sure you've got that right? 500ohms is waayyy too low for the VTT mod I've given

I've done the mod myself (always do) and even at about 40/35Kohm the VTT starts to rise up

[zbogorgon]

I will check what resistance exaclty I need for +0.2V, I did the mod with 50k VR. I tuned trimmer couple of times, no difference in BIOS or Guru readings and this was in the middle of LN2 benching. So next day I set to figure out what is wrong, so I found read point and do the measurement with DMM and I figured out that BIOS is quite right and I had to turn trimmer all the way to the end and then voltage jumped from 1.4 to like 1.6 in an instant.

[Johnny Bravo]

What are you setting the voltage inin the BIOS. For me 35Kohm ups the votage 0.2volts so it you are aiming for say 0.8 volts you can set ti the CPU VTT to 1.6volts in the bios and up the voltage using the variable resistor.

I wil show you the CPU VTT read point I use once I get the image hosted

[Johnny Bravo]

Red point marks CPU VTT measure point that I use

[zbogorgon]

you have found the most unavailable point

I use this one, about bios selection it doesn't mater much which one, it's about the same on all



p.s. need vcore mod

[Johnny Bravo]

problem with taking reading from your point is that they are not accurate, that is inside the switching circuit, so not a DC signal but AC - needs to be measured past the large inductor to the left of ur measure point

[Johnny Bravo]

Did a quick test this morning and the difference between my read point and your readings will be 0.3volts lower than mine, so you'll be suppling that 0.3volts more to the cpu than you think! I strongly urge you to reconsider your CPU VTT readpoint.

The CPU vcore mod will be up sometime tomorrow as I need to solder it on and test it, then take photos