P4P800se [Archive] - Overclockers Forums

View Full Version : P4P800se

SNieX

08-23-05, 12:11 AM

hey guys i want to do the mods for this board... asus P4P800 se,,, which ones can i doo..

for example if i get the droop-mod (for the vcore) done. once that is soldered and wat not... i see that ppl use a multimeter to detect something what exactly is done or what is being checked prior to turning it on?

thanks-guys i want to jump on this train quick... cause i have an electrical engineer thats coming down from the states to my house.. and maybe he can help me out (to do the MOD)....

SNieX

SolidxSnake

08-23-05, 12:17 AM

Just gotta set the right resistance for the vDroop, and the vDimm, set to max voltage. I Just modded my p4p800 rev. 2 (same as your board).

Thread here:
http://www.ocforums.com/showthread.php?t=406846

SNieX

08-23-05, 12:23 AM

SolidxSnake

08-23-05, 12:32 AM

thanks solid...

but still no answers to my questions.. nice job though...
can some1 explain to me in plain english what i should do... and what not to doo.. i would really appriate it... ive looked and searched all threads..but still quiet technical..really dont understand....

this is whats happening i got my vcore at about 1.39 and it drops to like 1.30 or less and what i have understood thats bad for it to drop... why is it bad no idea (can some1 explain)..and i want to fix that problem of the drop....

thanks all

SNieX

WOW 1.39 to under 1.30 is VERY VERY bad. Though I doubt it's accurate.

Either way, check out malvescorner.net. (http://www.malvescorner.net/p4p800.html)

For the VDroop mod, you need to get a VR/VRs, or resistors, enough to equal 28k ohms (I got a 50k ohms trimmer, and set it to 28k ohms). Then you solder the middle leg to one point (the SMD point), and one of the outer legs to the other point (the side of the SMD resistor).

For the vDimm mod, you need to get a 50k ohms trimmer, and set it to max resistance (~50k ohms). Then, you solder pin 6 of the LM358 IC on the board to the middle leg of the trimmer, and then solder pin 4 of the IC to an outer leg of the IC. To increase ram voltage, you must lower resistance.

Hope that helps ;)

SNieX

08-23-05, 12:38 AM

http://img393.imageshack.us/img393/1992/untitled0hh.png (http://imageshack.us)

SNieX

08-23-05, 12:40 AM

and here is the vcore at idle...
http://img385.imageshack.us/img385/1710/untitled18cj.png (http://imageshack.us)

SNieX

08-23-05, 06:08 PM

any1

SNieX

08-24-05, 01:10 PM

bump

SolidxSnake

08-24-05, 06:05 PM

Like I said, there are 2 different mods for this board. The VDimm and the VDroop. They are both fairly easy, however, you do need fine soldering skills. It requires a DMM, 2 50k trimmers, and some thin wire (along with a Soldering Iron and Solder ;) ).

The mod's can be found at www.malvescorner.net. Look at the p4p800 pictures, find the areas pictured (the VDimm is above the SATA Ports, below the DIMM slots, to the right of the AGP/PCI slots; and the VDroop is under the p4 retention bracket, near the mobo power connector).

To VDimm mod, solder pin 6 of LM358 to pin 4 via a 50k trimmer (set at max resistance/50k).

To VDroom mod, set the trimmer to 28k, and solder the middle and one of the outer legs to the two points listed in the picture.

If you need to go into more detail than that, don't hesitate to ask.

PM me however, I am not at the forums very often, and am not on AIM.

four4875

08-26-05, 09:16 PM

to hopefully nswer your question.. when your voltage is dropping under load, thats droop. and droop is bad becaus when it does it, you need to crank the voltage to keep the load voltages high enough to be stable, and when idle you're giving the cpu alot more voltage than it needs. so by doing a droop mod, it will be stable at higher clocks with the lower vcore settings in bios, meaning lower idle temps and longer cpu life.

To be sure the voltage readings are accurate, i reccomend using a digital multiMeter (DMM) which are much more accurate than mobo sensors. simply slip the black negative probe inside a ground connector on a molex plug, and touch the red one to one of the legs of the inductors by the cpu and its regulators. the inductors are the round ferrite ring wrapped in solid copper wire.

http://www.linearmagnetics.com/Graphics/Product-Inductor-1.gif

will look similar to that one, but may be different colors and number of windings. touching the probe to either of the legs will work, just make sure you're contacting bare copper on the inductor. that will give you a "true" voltage readin on the vcore.

simply record (write it down, or i like to snap a pic with the digicam) and compare loaded to idle, and in between.

I personally own a radioshack multimeter, one of their more expensive ones with a capacitor tester and frequency counter and the like, and also have access to an expensive fluke (which are known to be extremely accurate) and they both read the same voltage, so i trust that the RS is accurate enough.

SNieX

08-27-05, 12:11 AM

thank-you....

SNieX

four4875

08-27-05, 12:50 AM

lol no questions? and you're plenty welcome btw

SNieX

08-28-05, 02:34 PM

ohh maybe 1 last thing.... as i up the voltage some more just to see if i can make the computer more stable. the voltages as i read in CPU-z they flacuate alot... there never stable... never the less i can game and do ma stuff.. but it does sometimes freeze and what not... can this be resolved:

1. sink the mosfets?
2. get a better PSU?
3. get the Vcore mod done?

its a bitch right now.... i was at 4.1 ghz and had to drop to 3.60ghz cause im not comfortable with the voltages and i also get this thing in in red....

http://img71.imageshack.us/img71/1030/untitled6fp.th.png (http://img71.imageshack.us/my.php?image=untitled6fp.png)

help me out guys....

SnieX

SNieX

08-28-05, 02:36 PM

[img=http://img71.imageshack.us/img71/1030/untitled6fp.png] (http://imageshack.us)

there

SNieX

08-28-05, 02:36 PM

http://img71.imageshack.us/img71/1030/untitled6fp.png (http://imageshack.us)

SolidxSnake

08-29-05, 01:20 AM

Don't trust ANY software monitoring. Check with a DMM