the proper voltage to chipset !!!???

[Drake]

I have a little oc problem !

So.. when I do 250x8 or 260x8 everythink works fine(with default chipset voltage).. BUT when i try do get the cpu to more then 2200 Mhz the thing dies ! anyway i know that i should get more voltage to northbridge .. and when i try to rase the voltage.. to.. 1.6, 1.7 ... NOTHING, the computer dont start !!!

And my question is... what is the proper voltage to chipset ?

or maybe my cpu cant get more then 2200Mhz.. ?

i wanna get 250x10 .. .. what should I do !?

Can it be the power suply that i think is kind of weak !?

[Rickikaye69]

Flash your BIOS again.

[TheWizzard]

@Drake: could you extend your sig some more with volts, memtimings etc. for us?

In that way we can help you better i guess.

[Drake]

I run the momory at 200Mhz 2-3-3-5 2.8V

the cpu i run it now at 200x10 1.625V, default chipset voltage

Saturday i tryed 250x9 with 1.7 cpu voltage and default to northbridge

and the memory at 250Mhz 3-4-4-8 2.8V

 

the thing is the board dont need higher voltage at chipset when i get 250x8 @ 2Ghz .. but when i try to pass the 2200Mhz .. just dies.. Sometimes it starts and in prime the system crashes and when i restart it doesnt boot

 

In the signature config.. i rase only the multyplayer at 13.5 with 166FSB and get 2700+@2160Mhz at 1.7V .. and works grate. The memory i have it's grate, i took it even at 260Mhz.. with 3-4-4-10 (default voltage 2.8) and no problem with it.. and it shouldn't be problem with that ..becouse i have single channel and that should get higher FSB with no problem !

 

The bios.. can be the problem... i dunno .. i'll try to flash an other one , i have the stock bios..

[Poisonsnak]

The chipset voltage should only be related to the FSB. Mine will do 250 at stock voltage.

 

1.7V may not be enough for your CPU to do 250x9, I would try 1.8. I need 1.85 to do 250x10.

 

Make sure your RAM:FSB is 1:1 and never use CAS 3 on this motherboard.

[Drake]

hmm.. no CAS 3.. i'll try that.. 10x

[Drake]

after all we talk here.. I tryed what u've said... no CAS 3... and the same thing... anyway.. i think after all it's all about the chipset voltage and i'll try to rase it to see if the thing works..

[DoubleB]

I don't think more chipset voltage is your answer. I had that same processor and had to up the vcore to get that overall speed. I took mine up to 1.9v, but had a Volcano 12+ cooling it. If I had water cooling I would have taken it up to 2.0v.

 

Take the vcore up and just watch your temps.

[Spritzup]

Agreed, pump up your vcore until you see flames.... and then take it down on notch :eek: But seriously, as long as your load temps are less than 50-55 you can keep cranking up the Vcore. Overall chipset on most of these boards doesn't play a stellar role.

[JazzMang]

... and never use CAS 3 on this motherboard.

 

.... Unless you have OCZ EB ....

[Poisonsnak]

I dunno man I have heard nothing but troubles when it comes to cas3, myself included. My ram goes higher at 2.5 than 3 on my LP-B that's for sure.

 

What ram timings are you running at 241? Can you get your fsb any higher?

[NEOAethyr]

I run cas3 myself wihtout probs ^^.

In dual channel.

 

The cpu does'nt need more chipset voltage for higher fsb's.

 

The voltages are as such:

 

1.6v 250Mhz fsb

1.7v 266Mhz-275Mhz fsb

1.8v 280Mhx fsb

 

Might need 1.7v in between 250 and 266 of course.

 

This is with a slightly lappend north bridge stock sink, not mirror finish, I used 220 grit lol.

Next time I'll go to a mirror finish with 1000grit and sand the north brigde to the copper plate, and make that a mirror finish.

 

I wouid say the cpu does'nt need a higher nb voltage for higher multi's, could be wrong though in certain curcumstances.

In any case, you should never need higher nb voltages with 250mhz fsb, ever.

 

You're most likely having memory timings troubles.

For example 275mhz fsb x6 needs for me:

3-3-3-3 13-15 cas3, cpc off

alphas: 0-0-3-3-0-2-4

slews and strengths: 1-1-1-1-1-1

 

At 275mhz fsb x 7.5 (everyday use ver-> 1.45v cpu)

3-3-3-3 13-15

alphas: 0-0-3-3-1-2-4

slews and strengths: 1-1-1-1-1-1

 

Both setting use 1.45v for the cpu, just 7.5x is around the 2.2ghz limit at 1.45v for me.

As well as these voltages:

1.7v nb, ie chipset in the bios

3.0v mem

1.6v agp (66-81), or 1.7v (100mhz)

 

Higher multpliers apperently can need higher mem timings in some areas so keep that in mind .

 

Btw, my configs at 250mhz fsb:

250x8.5 1.45v cpu

250x10 1.8v-1.9v cpu (depending on the nvidia driver used, 67.22 quadro needs 1.8v, 71.80 quadro needs 1.9v)

250x10.5 1.95, no matter what driver used.

 

250mhz fsb needs 2.6v for the mem for my sticks.

 

Same timings as the 275x6 above, I use these all the way from 250mhz fsb to 275x6.

 

Edit:

This is all with a 1:1 mem ratio btw.

If your trying to get 250mhz fsb with something other then 2:1 or 1:1 ratios then your asking for trouble.

That might be a good reason why upper multi's don't work.

 

Anyways 2:1 works all the way up to 280 fsb x6.5.

No higher though with multi's at 280, at least when I last tried it with my old corsair xms 2700.

1:1 is better though, all around it kills the bios alot less and etc etc.