Asus P4P800 SE question.

[TheVillain]

Hello I just got back from RadioShack after buying a 100K ohm Potentiometer. I haven't seen one like this so I need to know if it will work and how to test the level of resistance. Here is the exact one that I bought from RS http://www.radioshack.com/product/index.jsp?productId=2062302&cp. I need to know which post/legs to solder I already to know the MB volt mod spots but do not know which legs to use.

[four4875]

i reccomend against using that one, it will be VERY touchy, its not multiple turn like reccomended forvolt mods. if a single turn one is tobe used, i'd reccomend using several 10k resistors in series with like a 10k pot, so you can start at 100k and work down to 90, then drop a resistor and pick up at 90 down to 80... and slowly make your way there, the less resistance of the pot the less touchy it'll be, but be sure to make up for the right total resistance with resistors.

but if you wanna risk using that one, if you're looking at it so the pins make a triangle, with point at top, youll wanna use between the point and one of the sides, which one determines which direction = more V on your mobo. you can cut off the unused pin, i reccomend using a multimeter to check which pins you want to use, check resistance and then turn it and compare where the resistance went, up or down.

[TheVillain]

I see what you mean by touchy...I figured out how to test the resistance and set it at 28, then it fell out of my hands and went up to 32. Unfortunately all they had at RS for the boxy looking ones was 1k and 10k, now my soldering skills are fair but I really don't want to have like 10 of those box looking trimmers and like ten resistors. Is it possible to use just a resistor maybe 30 or 28k ohms... if so what are the advantages and cons?

[TheVillain]

Also is silicone ok to use on electrical devices such as a MB. I found some and want to use it to hold my wires in place on the MB also to hold the trimmer in place on the MB. I would ude hotglue but I don't have any or a glue gun just silicone.

[four4875]

silicone should be fine. if you're going for 28k or so, i'd try a 20k fixed resistor and then the 10k multiturn, will give from 30 to 20k, if you need to go lower, trade the 20k fixed resistor for a 10 or 15. the only disadvantage i really see is that you wont have as much range (from 100k to 0) but an advantage is, it'll be really hard for you to get down near 0 ohms, so you cant max out the board that easily, you'll always have the resistance of the fixed resistor there, at least.

i suggested multiple 10ks caus i wasnt sure of your target resistance, and that would provide a wayto start up at 99 and work the way down, removing them 1at a time.

[TheVillain]

Just curious about how this looks to everyone , look ok right? I siliconed the trimmer in a pen cap so that I could mount it and also have leverage for adjustment. I set it at 28.0Kohms and puu tape over the trimmer as to prevent it from moving and screwing up the resistance. I plan to leave it connected to the MM for a while to see if it fluctuates from the 28K so far so good.

[four4875]

looks good to me. im just afraid it'll still be touchy, i dont wanna see a board go poof caus the pot was too touchy and spike the voltage.

[SolidxSnake]

Your best bet would be to get resistors that total 28K ohms. I used a 50K trimmer at 28K, but apparently your RS doesn't have those trimmers (come to think of it, mine didn't either). What I'd do is get a 20k resistor, and then get other resistors to equal 8k (do they make 4K resistors? or 1 5K and 3 1Ks). Then solder em all together, insulate them and solder two wires, the other ends to the point of the mod.

It is the vDroop mod you wanna do, right? ;)