I have a 50k vr on order plan on doing this mod on my p4c. But where are you guys getting these tiny grabbers from?
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I have a 50k vr on order plan on doing this mod on my p4c. But where are you guys getting these tiny grabbers from?
I got mine from rswww.com but I dunno if you're in the uk ? I've heard Frys or Radio Shack mentioned if you're in the US. I only used one in the end. 1 wire from the pot to pin 6 and the other wire from the pot to a ground in a spare molex connector. Gives me a nice 3.15 when bios is set to 2.85. :)
Why don't you just tie 1 strand of cu wire to pin6 and ground it? You don't need a vr or grabbers/solder.Quote:
Originally posted by expl0it
I have a 50k vr on order plan on doing this mod on my p4c. But where are you guys getting these tiny grabbers from?
I've done this mod, and used 50K vr so i think that i've got 3.15V, but multimeter shows 5.6V, rams work good 250mhz at 2/3/4/7/4(Twinmos Twister PC 4000)
but i want 3.3! So any turns on vr dont give anything - stil 5.6 and same timings! Someone help me please.
Are you sure you are using correct measuring points? Both MOSFET legs won't do. A good (and easy to reach) spot for GND (the "live" one is the MOSFET leg indicated on the pictures) are the mounting holes.
I did everything as shown at photos!
One spot to lower leg second to screw!
So main problem is in that "any turns on vr dont give anything"!
Guys need help!
You need to raise your 3.3V rail to go past 3.25V Vdimm.
i need to go from 3,5 - 4 V.
What i have to do?
Without modding my Powerpack.
What VR ?
u want to go to 4vdimm????? sounds brave but if u really wannda do that then wat u need is a 3.3V line of about 4.1volts.. no other way to go about it
would any components be harmed by having such a high 3.3v rail? Besides memory, what else draws power from the 3.3v line?
Quote:
Originally posted by gouda96
Why don't you just tie 1 strand of cu wire to pin6 and ground it? You don't need a vr or grabbers/solder.
hi gouda96...so this finally works....??? can i cut for example a broken fan's 3 pin plug and wires and tie one of them to the pin6 and plug the 3 pin plug to a fan header....???? then just select desired vdimm via 3,3v psu rail.... :)
what a mess i said...plug plug plug....:rolleyes:
i finally did the mod, the grabber is a pain to get it on the Pin 6 with my VGA Arctic Cooler blocking it. after some adjusting i got my VR to 10k to give me 2.95v @ default voltage. so i got 3.25v to play with now :)
That wire would be fine, but someone at ocforums had a good point as to why you should use a pot. You could adjust the pot so the max voltage is below the fluctuation of your psu's 3.3v rail to reduce the vdim fluctuation. The 3.3v rail is generally pretty stable, so this probably isn't a big deal, but it isn't to hard to use a pot and just adjust your 3.3v line a little bit higher.Quote:
Originally posted by evil_raver
hi gouda96...so this finally works....??? can i cut for example a broken fan's 3 pin plug and wires and tie one of them to the pin6 and plug the 3 pin plug to a fan header....???? then just select desired vdimm via 3,3v psu rail.... :)
what a mess i said...plug plug plug....:rolleyes:
a pot pot/vr between legs 4 and 6....????
or just a pot/vr between leg 6 and ground (fan header in my case)...????
thanx a lot for your help.... :)
It's baiscaly the same thing, since pin4 is ground. It is however better to use the same grounding level therefore going with pin4. It is also neater that way IMO. :)
It might be easier to remove if you grounded it to something like a screw, but like he said, it looks realy porfessional if you ground it to pin4 imo :D
great.... :D i'll try that way then.... a 50k vr would work...????
thanx so much both of you for your posts....i'm quite lost when soldering time comes in....
I think so, but you should check back through the thread for the suggested vr resistance just to be sure.
hello again....yesterday at night i decided to make the mods (psu 3,3v sense line mod and this vdimm mod) the first one worked perfect....4.1 before psu auto shuts down....now at 3.5 only but the vdimm mod....uff..i have a lot of questions now....first one is.... please someone could tell me where to measure the voltage...??? i mean i measured it at first without doing no mod....just to make sure it was the proper place to do the mod....and i did it with one leg of the multimeter on the spot marked on this thread before hollywood's `pic shows it great ....and the other leg where....???? i did it on a screw....and also on leg 4 of the lm358 chip itself as it may be ground there....and :S i always got 2,86v whatever i put on the bios....from 2,55 to 2,85 (this was before doing the vmod) i said wtf...and did the mod anyway without trying to make more measures from other points....(big mistake) and then whatever i regulate the vr (50k) it always stayed the same and it showed a litle fluctuation from 2.89 to 2,87 sometimes....then i tried other spots and i got from 3,22 on some of them....to 4,17 on others.... :S but they always stayed the same whatever i regulated the vr....so i just desolder pin 6 and went to bed (as it is now)... : (
could you help me....????
ok can we for a moment speak in noob terms. ok i have a p4p800 deluxe. so for a vdimm mod i need a pot like 10k or 50k. that's a resistor so less resistance means more voltage. i use a multimeter to measure the resistance from that.
ok now is when i get confused. this is how i understand it i guess. i take a wire and solder it to the middle leg of the pot and solder the other end to pin 4 on my mobo. then i solder another wire to the right leg on the pot and solder the other end to pin 6. so whenever i want to adjust resistance i turn a little screw on the pot? is that right? thanks.
yes... it's THAT simple, and if you don't have your resistance correct, it's STILL ok....because you can't fry your DDR 'cuz the max output to your DDR will be PSU 3.3V rail minus a few points, maybe 3.25V which ain't gonna hurt your BH5, in fact it'll like it :D
read in the guide about where the measuring points are and work from there...
Just be careful that when you solder, you don't join 2 of the LEGS together! Make sure your tip is clean, or better yet...new.
C
hmm can't seem to find where to measure for p4p800 just can find for the p4c800. can someone tell me where to measure for p4p800? can i just use a program in windows to measure?
anyone can tell me where to measure voltage....??? i did it in this point but whatever voltage i put in bios or i turn the vr i always got 2,86....go figure....:(
i mean....one of the legs of the multimeter go to measure point in pic....and the other one to ground...what should i use as ground...??? maybe that was my mistake....:confused:
http://perso.wanadoo.es/tha_evil_rav...%20mod.....JPG
i'm using a p4c800-e deluxe....
thanx a lot for your help....:)
You can use your case for ground. In case you don't have one, use a screw hole on the mobo.