View Full Version : 3.2E + Asus P4P800 = No boot over 1.6vcore
Djake
03-01-2005, 07:33 AM
Hello
I just can’t get my Asus P4P800 booting with over 1.6vcore. I heard something about a Prescott protection (max 1.6v), is that right?
olfen
03-01-2005, 08:00 AM
yes that's right
Djake
03-01-2005, 08:33 AM
Ahh damn. Any modded bios? To prevent that?
olfen
03-01-2005, 09:37 AM
nopp, only vmod
Are you talking about 1.6v for real? Or 1.6v in your bios? The p4p won't boot @ 1.6 ..try 1.675/1.65
Djake
03-01-2005, 10:52 AM
1.6v in bios.. It wont boot with anything higher then 1.6.
grimREEFER
03-01-2005, 12:39 PM
Are you talking about 1.6v for real? Or 1.6v in your bios? The p4p won't boot @ 1.6 ..try 1.675/1.65
it wont boot at 1.65 or 1.625, but it should boot at 1.6 and 1.675.
uclajd
03-01-2005, 12:46 PM
Again, there is a built-in limitation so the Pressys can't boot above 1.6 on 865/875 boards.
You can do an overvolt mod, but you'll need a soldering gun and a VR.
grimREEFER
03-01-2005, 05:52 PM
1.6v in bios.. It wont boot with anything higher then 1.6.
try 1.675(although thats kinda high for a prescott, it should work)
Djake
03-02-2005, 06:59 AM
try 1.675(although thats kinda high for a prescott, it should work)
No boot at 1.672, 1.7 , 1.725 either..
Mr_Slinky
03-03-2005, 03:08 PM
if any of you have the asus ai booster then you should be able to take it above 1.6 with that i am not gonna try it untill my xeons come in and everything is opperating in harmony
fastvfr
03-06-2005, 03:31 PM
With their extreme thermal issues, most users have discovered the hard way what happens when you pass more than 1.6v through a Prescott core.
Unless you are on phase-change cooling, I would advise against it.
uclajd
03-06-2005, 04:37 PM
With their extreme thermal issues, most users have discovered the hard way what happens when you pass more than 1.6v through a Prescott core.Most users? Show me 3 links of people who have fried a Prescott this way.
I agree you should have aggressive cooling, but most users? :confused:
I'd like to see some attribution for this statement.
lizardmech
03-06-2005, 09:21 PM
Mine doesnt let me go past 1.47 and anything over 245 FSB causes windows XP to revert to the old grey interface.
Djake
03-13-2005, 09:02 AM
Hi
I would like to know if it’s the same on Asus P4C800? I just got one today
And yes, its with a mach1 r404a. So I don’t see the problem with over 1.6v. It’s only for bench anyway
Lando95
03-13-2005, 11:56 AM
Most users? Show me 3 links of people who have fried a Prescott this way.
I agree you should have aggressive cooling, but most users? :confused:
I'd like to see some attribution for this statement.
I have personally fried 2 socket 478 Prescotts with 1.55 volts.
Fishman
03-13-2005, 01:18 PM
MB- P4P800-E dlx + droop mod & prescott 3.0
chosen: get:
1,4 1,33
1,45 1,36
1,5 1,41
1,55 1,46
1,6 1,5
after going higher comp didn`t boot
I pushed prescott down to 1,5 GHz & pushed V core up BUT:
chosen: get:
1,625 0,93
1,65 0,94
1,7 0,99
1,75 1,00
1,95 1,06
It seems to be real becouse wchen I chouse v-core higher than 1,6 not only the voltage droops down a lot but also tenperature goes much down.....
What`s the problem? I cant get v-core higher than 1,5....
Lando95
03-14-2005, 12:47 AM
^^ What psu are you using?
Djake
03-14-2005, 09:24 AM
Damn. It's the same with my new Asus P4C800. No boot with more then 1.6v
Fishman
03-14-2005, 02:04 PM
Damn. It's the same with my new Asus P4C800. No boot with more then 1.6v
It will boot just try with fsb=100 MHz and check voltage in bios monitor...
Djake
03-15-2005, 09:06 AM
Sorry.. But I dont understand what you mean, Fishman.
I just cant see how it sould work.
Fishman
03-15-2005, 09:41 AM
Sorry.. But I dont understand what you mean, Fishman.
I just cant see how it sould work.
I was testing my stuff and i find a wery strange think. When i set Voltage to 1.6V comp didn`t boot. But when I set FSB to 100MHZ (standard is 15*200MHz it is 3.0 presscott) comp boot. W check the voltage in bios monitor. The voltage was not 1.6 but about 1V. Some people are saying that it is e prescot limitation. I dont belive in that opiniob. Why? Becouse avryone has a prblem with seting woltage to 1.6 but the real voltage after drop mode is lower than you set. So my real voltage is lower, but i also have problem with seting higher than1.6volt.
cartmanea
07-29-2006, 06:28 PM
My board does this with a Northwood....any fixes for this?
dragonhunter
07-29-2006, 06:54 PM
I noticed it too. What I did was raised the Vcore to 1.675V or 1.685V then it booted.
cartmanea
08-01-2006, 11:08 PM
Thats a little high for my taste. I'd be comfortable with about 1.65v max, especially since it overvolts a little at idle.
Tallman
08-02-2006, 01:47 PM
Ah, interesting find this link.
I jsut started playing with my P4P800 deluxe again as it stopped booting into bios.
I thought I fried bios during a wrongly-done clear so I got a new bios chip.
Now it still has black screen and won't post at all even though all fans and such work.
Finally I remembered about that voice thing in bios so I plugged in a speaker and it says "board failed cpu test"
Guess my northwood 2.4 got tired of 3.0 :(
When I get a replacement, I will remember this thread, as I never played much with voltages on that board.