After 5 modded P4C800E this one acts weird.Your advice please

[brwmogazos]

After modding 5 P4C800 for both Vdimm and droop mod

my 3rd board which i own since the last two died from condensation acts weird after the droop mod

i modded it today since i am gonna use it with my mach 2 GT again but the board overvolts very much...

@ 1.7V in bios it gives me 1.744V

when i first booted and selected 1.75V i got 1.808 which is the first time i get after doing the mod...

the voltsge drooped a lot too

after lowering the resistance (havent measured the VR cos the board is now installed in the case) i was able to get my drop to like very low...

ie running prime now and having 1.744 idle i get 1.744v load...so no voltage drop... sometimes i can see some random 1.728 fluctuations but it stays at 1.744...

so at the mo i got no drop from what it seems but the board overvolts a lot

any ideas whats up?

i have to set 1.7V in bios to get 1.744 real... and if i go up to 1.725 i get 1.776 ....

[brwmogazos]

forgot to mention

i set the VR after soldering the board

if i set the vr to 28K before soldering into the board then after soldering i get a different readin...21 o 31 cant remember so i set it again at 28K

what could be causing this?

[Hell-Fire]

Are you saying that you are checking the resistance with it soldered to the board, and getting a different value than the preset 28k?

If so, that would make sense as you are soldering it in parallel with with other resistive elements.

[brwmogazos]

when the board is modded out of the case i solder it and then set the resistance...i used to do that before soldering the VR to the board but noticed it would change...anyways...soldered it again this time but its acting weird...as i said above :(..

cant see whats up with it..

[brwmogazos]

TBH it overvolts but idle and load theres litterally no drop...it stays at 1.744...

set @ 1.7 in bios which is great...just not accurate and if i select 1.725 it jumps to 1.776 with fluctuations of 1.792 which is not what i want...as its closer to 1.8V which may damage the chip?

[jcniest5]

What is the proper way to set the pot? Before or after soldered? I set mine before soldered to 28K but it doesn't work. I get the same exact fluctuation before and after the mod. I used the two soldering pads and not the resistor close to the IC. I know I did it right because I traced all the wires from and to the soldering pad and I get reading on my multimeter tester. I am wondering what I could have done wrong. Why is it not working!!??:brick: :cussing:

[brwmogazos]

Anyone guys?

[hallowen]

You Should Have Set the Pot to 28K BEFORE you Soldered It To the MoBo.;)

I've seen Other ppl on the Forums get Varying Results from Droop Mods.
When I Did My Mod, It Helped Some, But not a Lot for the Voltage Variance on My MoBo.
Everyone seems to get different Results no matter How many MoBo's they Mod.:)

BTW:
If I go Higher Than 1.600v, The Voltage tends to go Higher than What I set, Just Like Yours is Doing.

And I use to run my 3.0C at 1.792v on this MoBo.:p:

[brwmogazos]

Sorted :D

thanks hallowen.

with my last board i set 28K before soldering...then after soldering i noticed it dropped or increased cant remember...

tuned it to 28K again and tbh it was amazing man...no overvolting...1.75V was 1.75V...and dropped just a tiny bit...

that board died though...

a few mins ago what i did is check my vrs....i bought loads...

i unscrewed one fully...max was 48.8 something...

then found that 7.5 turns(tightening) is 28K spot on...

i did the same to a second VR and same thing happened...gave approx 28K with a small variation...

so tried it while my pc is online now....unscrewed fully and 7.5 turns later i should be at 28K approx :)

i have the cpuz on and prime to test while adjusting the VR...

the cpuz showed a volt drop while tuning the vr to 7.5 turns and 1.7V selected in bios gives me 1.74V idle looking at the mbm average voltages....

then run prime for like 1-2 minutes and prime showed an average voltage of 1.72 V so 0.02 drop is good i guess...

so i get an overvolt of 0.4 now than what i select in bios...

good stuff :)

thanks

[jcniest5]

Well, two nights before, I experimented it almost the whole night. I tried resistance of 50K all the way to 10K. The best resistors with the least fluctuation is the 12K and 18K. When using the 12K, it fluctuates between 1.68 and 1.63. When using the 18K, it fluctuates between 1.65 and 1.70. The funny thing is after I decided to go with the 18K, after soldered it securely to the wire and put the mobo back in the case, guess what? There again, it went back to 1.57 - 1.68!!!! I was so mad!!! :mad:

Today, it is doing much better. The fluctuation is now between 1.65 and 1.70. If I set the Vcore to 1.60 in the BIOS, I would get a 1.68 in MBM5. I guess it's going to be a little higher than I set in the BIOS. Whatever I set in the BIOS, it's like .68 higher in MBM5. Without the mod, it's .32 higher in MBM5 and fluctuating between .10-.13. With the mod, reading is .68 higher and fluctuating between .02-.05.

I found that the best way to make sure you can get to the mod and change any component easily is to use some longer wires and have the wires going the outside of the crowded components. That's the way I did mine since I didn't have vrs so I'm going with fixed resistors. And especially in my situation, I had to experiment with several resistors rating before settling with the one I know works.

I don't know about the 28K resistance, but in my situation, it never works. I would get the same exact fluctuation regardless of the mod or not. That's why I decided to experiment with different rating of resistors and found that the 12K and 18K work the best. I have the 18K as the mod now.

If your mod isn't working, probably you might want to experiment with different rating of resistors like I did, too. Or if you have a 50K pot, you can adjust all the way down to the 10K range and see if it works for you.