dfi infinity nf2 vdrop and overcurrent mods

[STEvil]

Originally posted by Vlad Draculea

STEvil it wont work because the load balancing wires should be in the other 3 mosfets.

Ok, in theory all 3 mosfets have the exact same voltage at the point where the VR is being attached, correct? If this is so, then the voltage at all 3 isen pins should also be the same.

If this is the case then we should be able to use a wire from each mosfet to the next and one wire from the center mosfet then to the VR then the 3 isen pins.. like this.

[SAE]

Originally posted by Vlad Draculea
if it were the overvoltage we only would get a blank screen, no post not nothing, but instead we usually get reboots or hangups when in load and usually if we back up the mhz seriouslly we dont get reboots but extreme voltaje variations.

My experiences

It definately cannot be overvoltage protection... as I already was at 2,45V VCore (no vsense mod)

@STEvil

I see your point

IMO it's looking pretty logical too, as it would work

[PORTUGAL]

hy people

i tested the mod and it works but i have a strange problem,after shutdown the pc does not boot anymore,whem press power on does nothing.only power on if i remove batery and reset bios for 1-2minutes,this problem only ocurs if vcore mod is make,please sugestions.with vsense mod the problem is the same.

thanks

[STEvil]

Heck of a lot simpler than trying to calibrate 3 different VR's!

[STEvil]

Originally posted by PORTUGAL
hy people

i tested the mod and it works but i have a strange problem,after shutdown the pc does not boot anymore,whem press power on does nothing.only power on if i remove batery and reset bios for 1-2minutes,this problem only ocurs if vcore mod is make,please sugestions.

thanks

Which mod specifically? Are you running cooling that takes your processor below 0 degrees celcius?

[PORTUGAL]

Originally posted by STEvil
Which mod specifically? Are you running cooling that takes your processor below 0 degrees celcius?

im using watercooling on the cpu,if i dont make the vcore mod this problem doesnt ocur,the overcurrent mod alows me to go higher mhz without reboots

[Vlad Draculea]

o

[SAE]

Originally posted by PORTUGAL
im using watercooling on the cpu,if i dont make the vcore mod this problem doesnt ocur,the overcurrent mod alows me to go higher mhz without reboots

Cool. The mod is working :thumbsup:

But only getting higher without reboots? Does it mean it's not stable?


Can anyone confirm getting higher vcore/mhz fully stable with this mod?

[PORTUGAL]

hy

power on after shutdown solved,the cmosreloaded do not record the power on password.

yes the mod is working,and more stable.

with no mods at 10x240mhz 2.00vcore sometimes reboots runing prime or toast.

with mods at 10x248mhz 2.05vcore(in test at this moment)runing prime at 25minutes and no problems at moment.

i only make vcore mod and increase resistance isen from 2.2k to 2.7k.

[SAE]

Originally posted by PORTUGAL
hy

power on after shutdown solved,the cmosreloaded do not record the power on password.

yes the mod is working,and more stable.

with no mods at 10x240mhz 2.00vcore sometimes reboots runing prime or toast.

with mods at 10x248mhz 2.05vcore(in test at this moment)runing prime at 25minutes and no problems at moment.

i only make vcore mod and increase resistance isen from 2.2k to 2.7k.

Can you post pics please ?

Did you set the isen pots to 2,7K or how???

[PORTUGAL]

im using fixed resistors,but if you use pots you can set them with a multimeter.

images more later.

[sai]

So what fixed resistors are needed 2.7k ?? Please pics now, I wanna do this today.

Isen = Overcurrent mod ?

[SAE]

Originally posted by sai
So what fixed resistors are needed 2.7k ?? Please pics now, I wanna do this today.

Isen = Overcurrent mod ?

I-sense like V-sense

Yep. Overcurrent indeed.

@Portugal

Did you use 3 fixed resistors with 2,7k? All are the same? And each going to its appropriate mosfet??? Pics would rock. Post them when you're ready

Thanks in advance :thumbsup:

[mongoled]

Right if its a case of replacing the resistors them im gonna grab a few and try it out ASAP.

Portugal you are the only one to try the mod so far and you seem to have success. I see you are using 2.7k resistors. My resistors values are 2.17, 2.2 and 2.2 respectively.

If 2.7 does the trick I will grab some, ill probably grab some of a slightly higher rating just incase someone gets better results with a rating say above 3.0 ohms.

mong

-EDIT-

This is the info I found at my local electronics store, would these be ok

A ‘Universal Resistor’ with a superb specification. It may be used as a superior replacement wherever carbon film ¼ W, 1/3W or ½ W are specified since its size is the same as ¼ W types, yet it can be run continuously at 0.6W with ambient temperatures up to 70°C, thanks to the highly even thermal characteristics of the ceramic substrate. It is also a superior replacement to most metal oxide and thick film resistors due to its very tight tolerance, ±1%, and its low temperature coefficient, only 50ppm. Working voltage max: 250V Tolerance: ±1% Power rating: 0·6W at 70°C Temperature coefficient: 50ppm/°C Noise level: Typically 0.01µV/V Dimensions of body: 6·5mm long, 2·5mm diameter Note that to make up ‘odd’ values not stocked, resistor networks may be built and if all the resistors in the network have a 1% tolerance, then the tolerance of the whole network will still be 1% tolerance.

So I will be picking up three 2k7, three 3k and three 3k3 resistors.
Someone please correct me if this info is wrong

[PORTUGAL]

3.0k or 3.3k its better at 10x250mhz(2.1vcore) pc reboots(with 2.7k) on prime

[Vlad Draculea]

y

[mongoled]

Ive edited my message above.

Could someone please verify the info for me.

I measured the first abd second one and they were the same as when unsoldered, is it safe to assume the third one will be the same?

Getting ready to go to the shop right now!!

[mongoled]

Just noticed all the freaks are in here myself included



Need verification please, please

[Vlad Draculea]

,

[SAE]

Are you gonna unsolder the resistors from the board to replace them or do you solder to the vreg/mosfets?

I think the onboard resistors are all the same (the 3) - according to their tolerances

[mongoled]

Thank you for that Vlad,

With the new information provided by Portugal I will now buy three 3k, three 3k3, three 3k6, three 3k9, three 4k3 and three 4k7 resistors.

Hopefully by the time i get back there will be some new information on the optimum value for the resistance needed.

Thank you so much



mong off shopping.

-EDIT-

SAE im gonna remove the resistors which are onboard and replace with the ones im gonna buy. Darn i forgot sommet, I have heatsink placed on the mosfets, I hope the resistors i buy will be very small. I want to solder in the same place but if they are too big I wont be able to because i need the heatsinks on the mosfets

[SAE]

Originally posted by mongoled

-EDIT-

SAE im gonna remove the resistors which are onboard and replace with the ones im gonna buy. Darn i forgot sommet, I have heatsink placed on the mosfets, I hope the resistors i buy will be very small. I want to solder in the same place but if they are too big I wont be able to because i need the heatsinks on the mosfets

Yes.

I already wanted to ask if you ll buy smd resistors

Sould be very compact ones. Hope these are easy to solder :thumbsup:

[mongoled]

Unfortunately the picture on the website of the resistors didnt show smd ones. Im hoping there will be some at the shop when i go.

Just gonna right the product codes be4 i go

[SAE]

Hey Portugal

You have to attach the pic to the message. It did not work the way you did

[DJ_FedAss]

So have anybody checked if this values compare to the Abit NF7 ? Because it should be the same mod but probably with different Values of the resistors.