Vcore stability - a quick question ?

Brizzles · 24 Jan 2006 at 19:20

O'cing my AMD 64 3700+ Claw

Up to 2700 ( 225 x 12 ) at moment on air , temps 56c

Using MBM 5 to monitor temps/voltages etc.

When Vcore is set to 1.595 v in Bios ( DFI lanparty nf3 250gb )
this fluctuates to around 1.63/65 at testing in Super PI.

Is this normal to fluctuate ( i.e within the PSU 's 5% tolerance ) or should the vcore be rock solid and stable at 1.595 when set ?

Thanks in advance.

Cheers.

Jimbo Mahoney · 24 Jan 2006 at 20:36

It's most likely pretty solid.

I've found motherboards to be really bad at reporting voltages.

Check with a multimeter if you can find out where to measure Vcore from.

May as well check the PSU lines too and see how much different they are than the mobo is reporting.

stigggeh · 24 Jan 2006 at 20:40

i cant comment on the DFI but you should try using a ASUS P4C800 1.55-1.65 after gaming using the high/low on mbm5

that was until i droop modded it

Itsjody · 24 Jan 2006 at 22:14

i think the dfi undervolts/overvolts depending which method you choose to do it by in the bios.

Jimbo Mahoney · 25 Jan 2006 at 14:57

Itsjody said:
i think the dfi undervolts/overvolts depending which method you choose to do it by in the bios.

Link?

I found mine overvolts by 0.01 - 0.02v.

e.g. set 1.6v in BIOS, under load, CPU reads as 1.62v with a multimeter.

Itsjody · 25 Jan 2006 at 21:29

Check out dfi street forums, google is your friend :cool:

LabR@t · 26 Jan 2006 at 14:01

is 1.6 safe on air, winnie 3200@ 2.5 idle 34 load 48

Itsjody · 26 Jan 2006 at 16:04

Some people say 1.55V max on air, some say 1.6V , depending on your temps. What are your temps like @ 1.6 V ?

LabR@t · 26 Jan 2006 at 16:15

as previous post idle 34 load 45-48 c

LabR@t · 27 Jan 2006 at 06:05

?comments on temps?

Jimbo Mahoney · 27 Jan 2006 at 09:00

Yes, that's fine.

I personally would push volts as far as I could on air because you will more likely be limited by temps before you are with volts.

I don't find the AMD64 E revision benefits beyond ~ 1.6v anyway.

Itsjody said:
Check out dfi street forums, google is your friend

Everywhere I've found agrees with my findings of ~ 0.02v over when load.

welshtom · 27 Jan 2006 at 09:19

Jimbo Mahoney said:
Yes, that's fine.

I personally would push volts as far as I could on air because you will more likely be limited by temps before you are with volts.

I don't find the AMD64 E revision benefits beyond ~ 1.6v anyway.

Everywhere I've found agrees with my findings of ~ 0.02v over when load.

I agree.

my board is pretty much spot on, but never undervolts.

google = friend

MultiMeter > google

Tom

Street · 27 Jan 2006 at 13:33

Itsjody said:
i think the dfi undervolts/overvolts depending which method you choose to do it by in the bios.

my Ultra D tends to undervolt... If i set it to 1.5V in the bios, restart, go back into the bios or load CPU Z in Windows and it reads 1.45V

Jimbo Mahoney · 27 Jan 2006 at 14:55

Street said:
my Ultra D tends to undervolt... If i set it to 1.5V in the bios, restart, go back into the bios or load CPU Z in Windows and it reads 1.45V

The voltage reporting of the board is incorrect.

It overvolts - get a multimeter.

welshtom · 27 Jan 2006 at 15:06

multimeter > cpuz

Street · 27 Jan 2006 at 15:24

Ill see if I can hunt one down off of someone and measure it..

Whereabouts do I measure from to find the voltage?

meths · 27 Jan 2006 at 21:24

My board overvolts when under load (I previously thought it was the PSU's fault) but I put 1.7V through my claw at one point. It gave a 100mhz jump compared to 1.65V but temps were hitting 58C load and mobo monitor was showing a Vcore of 1.75.

Absolute MAX temp for a 3700 Claw is 70C acording to the AMD website but I wouldn't like to test that with my equipment.

Jimbo Mahoney · 28 Jan 2006 at 14:01

Street said:
Whereabouts do I measure from to find the voltage?