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Epox 9nda3+ Vcore Idle Drooping


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Just now noticed this one while trying to lower the voltage on my ~2.45GHz 1.6v overclock. I lowered it from 1.60v to 1.55v and it primed good for around 10 minutes, so I restarted and tried to lower a bit more, to 1.45v, but it blue screened before windows. Tried 1.55v again, blue screened before windows. WTF! So, yeah, it's about a 0.03v droop from idle to load. Load is pretty good, 1.575 switched between 1.568v and 1.584v or something. Quite happy with that, but straight after I turned off prime just now it dropped to 1.53v, which isn't good!!

 

So, anyone else (r_target?) noticing this one? There's a mod that I think I might do that's supposed to fix this. It involves removing one of those little resistors and replacing it with a 5k pot though :(

 

http://www.xtremesystems.org/forums/showth...ed=1#post646544

 

But with this mod I think I might be able to get it down to 1.55/1.525v stable so it might well be worth it IMO :rolleyes: You think so??

 

EDIT: Actually, I could probably pencil mod that couldn't I? Think I might well have to go give that a quick go :) I shall be back with results as soon as I find me a pencil :D

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Droop is when the vcore goes down under load, not when you're idle. The situation you're decribing doesn't sound like a problem to me. What I'm seeing if anything, is that the vcore steps up a little bit under 100% load. My idle is what I set in BIOS, and my load goes up about .02v from that.

 

If it was sagging under load instead of increasing, that might be something to worry about.

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Hmm, well it's very odd. Maybe it's a 3+ problem only (they have different vcore things or something?) My load is pretty much what I set it, but when idle it drops really badly. ~1.575v under load and only 1.536/1.520v idle! That's not right... Pencil didn't seem to work, so I guess i'll have to replace that resistor :(

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Well, I read that the 2.1 boards have a different chip.. from that link actually!

 

I know there are already EP-9NDA3+ related threads, but Rev2.1 board has

another Vcore contoroller --- SC2643VX.

SC2643VX is also used on A8N-SLI, so I think this mod may help

A8N-SLI users---including me

I'll try A8N-SLI Vcore-mod soon later

 

So it's probably just the 9nda3+ v2.1 boards affected I guess. Wonder if any A8N-SLI users (any here???) have the same problem. The picture says the mod fixes the 'load/unload state' vcore droop, so I assume it fixes the issue I am having. Time to steal back the hot glue gun from my crazy technician at Uni me thinks :) Or.. find a better pencil.. maybe.. but I don't think a pencil will lower the resistance enough?

 

EDIT: Oh and thanks for replying to all my threads so far :D You must be getting pretty fed up of me by now B)

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