Set VCore = 1.1000 Volt, and show us your CPU best shot !

[bing]

I'm now running P4-D805 on P5B-Deluxe Wifi Rev.1.03g, and found out that if I set the VCore=Auto while on "stock speed", it gave me about 1.26V reported by Probe.
But when I set manually at 1.1000V, it still can run rock stable at "stock speed" ... AND ... also stable at 3 GHz too !
Everything else on AUTO except CPU Frequency and VCore=1.1000V.


Even at stock speed at VCore 1.1000V, the CPU is now 10C colder & stable.



Now, show us your best shot on 1.1000V !

EDIT: It seems like only P5B-Deluxe could go as low as 1.1000V VCOre as I'm aware of, but if yours non P5B-Deluxe could go as this low or even lower than 1.1000V, please share it too here ! Tips: A DMM will be handy to see if your mobo is a liar or not !
Mine verified with Fluke DMM at 1.085 V

[HamidFULL]

you are Wrong for Core 2 Duo and I dont know maybe you are true with Pentium D!!
if you set Core 2 duo voltage blow 1.2250v you will see huge increase of temp (idle 50C)

[AMDfreak]

you are Wrong for Core 2 Duo and I dont know maybe you are true with Pentium D!!
if you set Core 2 duo voltage blow 1.2250v you will see huge increase of temp (idle 50C)

Do you have anything to backup this claim? I fail to see how lowering the vcore would raise the idle temps.

[Durzel]

Simple thermodynamics - lowering voltage won't increase temperature, it's impossible!

[lowfat]

you are Wrong for Core 2 Duo and I dont know maybe you are true with Pentium D!!
if you set Core 2 duo voltage blow 1.2250v you will see huge increase of temp (idle 50C)

you are joking right?

[Tekki]

I found my C2D stable at 1.125 or something like that. Althuogh when I reset the bios and put it down again, it kept giving me a CPU OVER VOLTAGE error which made no sense.

But when it was low, from what I remember, it was 5C cooler idling and at load, it was around 42C.

[HamidFULL]

AMDfreak
Do you have anything to backup this claim? I fail to see how lowering the vcore would raise the idle temps

Durzel
Simple thermodynamics - lowering voltage won't increase temperature, it's impossible!

lowfat
you are joking right?

did you have Core 2 based system yet? u can test it look my test result :
E6300 1.3250v normal vcore idle 37-40C load 55-58
E6300 1.2500v undervolt idle 36-38C load 53-56
you get lower temp by reducing voltage Until 1.2500v but when u set your voltage blow 1.2250v you will see :
E6300 1.200v undervolt idle 50-54C load 70-74

test setup : DS4 C2 F5 official + E6300 L627A + BigTyphoon
Also I test it in DS3 + E6400 system and I saw same result

[Tekki]

Okay back and I need some help.

I lowered my voltage to 1.1 and Asus Ai Suite and CPU-Z reports it at 1.072

Now when I booted my PC, it said CPU OVER VOLTAGE ERROR!

Is this alright? Should I put it back on auto?

Oh it's idling at 33-34 right now which is a good 4C lower than before.

[Highland3r]

Just set the bios to ignore the vcore reading (it's set via the hardware monitor)
Probably reports out of spec voltages as overvoltage as you'd not usually expect to see this degree of undervoltage.

[HamidFULL]

Where you see "CPU OVER VOLTAGE ERROR" during boot? I set it to normal and decrease it until you find lowest error free Vcore

[Tekki]

I'm running SuperPi right now and the temperatures are 36C on one core and 39C on the other!

[3oh6]

Where you see "CPU OVER VOLTAGE ERROR" during boot? I set it to normal and decrease it until you find lowest error free Vcore

keep in mind you have different motherboards...on the POST screen of the P5B-DLX it says overvoltage error when the voltage is too low, ignore this or as someone mentioned, set it to ignore in the system hardware.

now as for this higher temp at lower voltage talk...its ridiculas. like Durzel said, simple thermaldynics makes it impossible. clearly the Gigabyte boards are doing something when you undervolt them that much. possibly to insure that you don't undervolt and cause instability without knowing. have you checked the voltages in the BIOS and Windows? when you get these higher temps are you actually getting only 1.1v to the VCORE? have you checked the board with a multi-meter?

the asus boards don't do this as seen by the quick screenshots below:
Default Voltage (1.325v selected in BIOS):


Lowest Voltage (1.100v selected in BIOS):


so yeah, don't just accept things when they don't make sense and go against simple science. chances are there is something going on behind the scenes on the Gigabyte boards. perhaps fire an e-mail to them for an explanation if the voltages report normally in windows and the BIOS.

[Lestat]

you are Wrong for Core 2 Duo and I dont know maybe you are true with Pentium D!!
if you set Core 2 duo voltage blow 1.2250v you will see huge increase of temp (idle 50C)

.

before making such an outlandish claim i would suggest you do your math and research.
what you said is insanely laughable.

[iamjcl]

Clearly, lowering the Vcore also lowers the temps.

I run speedstep enabled via Crystal CPU, and in "low speed" (low or no load), the vcore shifts down to 1.05V, and Idle temps drop approx. 5c below where they would be if I was not using Speedstep (same Vcore all the time, no matter the load).

6600 cpu on P5W-DH. 3.6 Ghz / 1.5v in "high", 2.4 Ghz 1.05v in "low".

[rick_fx]

.

before making such an outlandish claim i would suggest you do your math and research.
what you said is insanely laughable.

QFT

[camouflage]

I vote for competition with 2.1 Vcore................

[lawrywild]

if only asus put volts below 1.225 into P5WDH bios

[roibm]

.

before making such an outlandish claim i would suggest you do your math and research.
what you said is insanely laughable.

hey hey hey... what if he's right?
and before you make me insane or whatever... lemme explain it to you... it's fairly simple... bad mainboard/bios/software piece, whatever? when you go below 1.2250v it actually feeds 1.6V or whatever other value

I'm willing to bet he didn't check the voltage fed with a DMM, and I'm thinking about betting on whether he knows how to hold such a piece of outlandish hardware

the outlander

[Falkentyne]

I've noticed that Hamidfull has not replied back.

Hamifull, the least you could do is post an apology. You should have guessed by simple logic that your theory was flawed. I bet you the chip was getting about 1.6 or 1.7 real vcore. BIOSes can do that when you go above or below a certain voltage.

How long as the C2D been out? How long have motherboards for C2D's and P4D's/Presler's been out? Don't you think that if what you said were true, EVERYONE would know it by now?

I realize you simply had a brain fart, but come on...

[Falkentyne]

hey hey hey... what if he's right?
and before you make me insane or whatever... lemme explain it to you... it's fairly simple... bad mainboard/bios/software piece, whatever? when you go below 1.2250v it actually feeds 1.6V or whatever other value

I'm willing to bet he didn't check the voltage fed with a DMM, and I'm thinking about betting on whether he knows how to hold such a piece of outlandish hardware

the outlander

How could he be right?
If he's "right", then that means that 1.1 REAL vcore would heat the chip up more than 1.35v. This has nothing to do with BIOS errors, which is clearly what happened here, as I mentioned.

He said that putting the voltage too low heats the chip up, which is wrong. What he SHOULD have said is putting the voltage too low in the BIOS causes it to set the real voltage far too high.

Many people have put voltages at 1.0 or 1.1 on different boards with normal results. But not all boards handle voltages out of spec ranges correctly.

[775911]

I used to do similar with a barton mobile.

What he said is equalivant to saying a dimmer switch will make a lightbulb brighter when you turn it down. Nope, not if its wired up properly and considering computers and the :banana::banana::banana::banana:ups that can happen, that is more likely.


How close is the link between conroe and its mobile brother..

[StealthyFish]

............

[bing]

FYI, that 1.1 V was verified using DMM and it is 1.085 reading from my Fluke DMM.

Just realized that this thread is for P5B-Deluxe owner eh ? Also I didn't aware even P5WDH can't go lower than 1.225, thx Larrywild !

To 3oh6 :
Thanks & nice result there !
An instant 6 C colder and it looks like both CoreTemp and Probe agreed on that too ! How can high can you OC with that 1.1000 V while remain rock stable ? Please share and your allendale production week too !

To Tekki :
Too bad, feel sorry for you, it seems like you got a hot CPU there, but 4 C colder with same performance is good too ! Which production week is that ?


Now, for other P5B-Dlx owner or other mobo that could get as low as 1.1000V VCore, please share your result on lowest VCore as possible while maintain stable, and inform us the week code as well. Nothing to proof or proud of here since you can't validate it, its just for gathering the bigger picture on how Intel cpu is yielding, the more the merrrier.

About the temperature, it is not the number since it might vary because of inaccuracy, it is the difference/delta that matter, the most important thing is to watch the result before and after vcore changes to 1.1000 if possible as 3oh6 result.



Note :
To basher, if you can't go lower Vcore or worst when you claimed with lower vcore will make the CPU hotter assuming you're honest, than your mobo is a liar, just throw it out of the window and get a better one !
And stop contaminating this thread by showing your noobeeness damn it !

[Tekki]

Well my motherboard temperature is 30 and it idles at 33 so I can't say it's too bad.

It's quite warm in my room you see. I doubt my CPU will ever go below 28 untill Winter comes.

It's a week 28 o_O

[KenzoIX]

1.1 @ BIOS, 1.12 @idle and 1.088 under load
DS3 F6 BIOS
CPU E6300 retail week 25, stock HSF
My RAM is holding me back . It's a value 533 stick. I can boot to windows at 390Mhz FSB but it's unstable. With decent RAM I think my CPU will do 400Mhz FSB at 1.1V