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Prescott Power

D

Dan_D

Cat Can't Scratch It
Joined
Feb 9, 2002
Messages
65,839
Well I've done it now I think. I had to build a second rig for my GF (So she stays off of my machine.) and I got a 3.0E Prescott CPU to put in it.

I decided to put the Prescott in my game machine and see what kind of OC I could get Vs. my Northwood.

Anyway I've got a 3.0C Northy right now. I installed the Prescott processor and started it up. The machine posted, then immediatley shut down. I was like WTF?!?!

Well after more carefull consideration and more trying to get the thing to boot I re-installed my Northwood.

It came right up. So I thought bad processor right? Nope. I installed it in the machine I was building. It has an Intel D865PERL in it right now. The machine came right up and started the windows installation. I left if running all night last night. So my Prescotts fine.

The moral of this story. 430Watt PSU + 4 HDD's +2 Opticals + 6800GT + ALOT of fans + Prescott= No boot.

So what I need here is a bigger power supply. I thought I'd share my Prescott experience with everyone.
 
running my 2.8e @ 3.4
with the specs in my sig on what id consider an average 500w power supply

and she runs beautifully
pressys and certain boards dont get along, that could have very well been your problem
 
I don't think you can just go and blame the power supply for the inadequacy. You know, the Prescott draws a lot more current than the Northwood, but this affects the motherboard power supply even more than the box you would call the "power supply." The motherboard's onboard regulators must convert one of the standard DC voltages--usually 12 volts--down to input voltage, which is close to V_core. At an input voltage of, say, 1.4 volts, the CPU draws upwards of 50 amps for high-end Northwoods, and over 65 amps for many Prescotts. The thing is, if the board was designed for Northwoods, who is to say that the onboard power supply can feed a Prescott the necessary power?

We already know that most "430 watt" power supplies can deliver well over 250 watts, so the power draw between Northwood and Prescott isn't nearly as significant--only about a 5% increase in power demands. So it's likely that the power supply can handle a Prescott, even with the rest of your parts, but the motherboard is probably the weakest link.
 
My power supply is adequate for a Prescott. I know that. But my total power supply draw is insane. I've got 4 HDD's a 6800GT OC'ed to Ultra speeds, 2 Optical drives, 6 LED fan's and two bay fan's with 3 fans each. All this stuff draws power. So I am blaming it on total system drain.

I've researched it and I know for a fact that Prescott's work on my board. With the latest BIOS I should be able to run it. Provided that I'm not trying to draw more power than my PSU has to give. Which I believe is my problem. I also was only trying to run it at stock speeds. So it's not like I was messing with the vcore or anything.

PS: I've since removed one HDD to make clearance for the 6800GT and the 5 1/4 mounted fans. I am going to re-try my Prescott swap and see what happens.
 
430watt means dick unless its a quality power supply.

Let me give you an example, I had rebooting problems with my rigg a long time ago. I had been using a no name 350 watt power supply. I then put down the cash for an Enermax 365.

No Name power supply= 3.3v@ 28a, 5v@ 30a, 12v@ 15a!!!
Enermax power supply= 3.3v@ 32a, 5v@32a, 12v@26a

The Enermax delivers much more power at nearly the same wattage. Since then the system is MUCH more stable.

Cheap high watt power supplies are usually garbage, I have seen el cheapo 500 watt power supplies online that supply less amps and overall power than my Enermax 365.
 
I know that the wattage is meaningless unless it's a quality power supply. Mine is an Antec True-Power 430WATT. The Comp USA brand 600WATT PSU won't power as many devices as my Antec 430 will.
 
Sir-Fragalot said:
I know that the wattage is meaningless unless it's a quality power supply. Mine is an Antec True-Power 430WATT. The Comp USA brand 600WATT PSU won't power as many devices as my Antec 430 will.
Click to expand...


blah, didn't see the brand you had :p
 
Well actually, now that I've got both systems operational and the extra drive and fan bay fans are out I may try again.
 
have you updated to the 1016 BIOS for the P4C800?
That's the only one that officially supports the high end prescotts.
 
Big Worm said:
430watt means dick unless its a quality power supply.

Let me give you an example, I had rebooting problems with my rigg a long time ago. I had been using a no name 350 watt power supply. I then put down the cash for an Enermax 365.

No Name power supply= 3.3v@ 28a, 5v@ 30a, 12v@ 15a!!!
Enermax power supply= 3.3v@ 32a, 5v@32a, 12v@26a

The Enermax delivers much more power at nearly the same wattage. Since then the system is MUCH more stable.

Cheap high watt power supplies are usually garbage, I have seen el cheapo 500 watt power supplies online that supply less amps and overall power than my Enermax 365.
Click to expand...
a little antec truepower 330w can take out a no name brand cheapo 550w psu

should even whip your enermax too...
 
yea.. i have around the same setup as you.. and i'm running a 480W high end thermaltake PSU, with max at 550W. haven't had any problems.. get a better PSU, i don't know what you're doing with that garbage
 
WTF? either your GF seems to like high performance systems or you plan to use it as a backup when yours fails, which one? :D

The prescott is fine, the GT may be the problem ( drawing too much power )
 
my computer is attached to a battery backup thats supposed to have 550 watts support. With my overclocked prescott and overclocked 6800 ultra, it trips off the battery backup by overdrawing. These bad boys surely suck up a whole lot of power.
 
meowCat said:
a little antec truepower 330w can take out a no name brand cheapo 550w psu

should even whip your enermax too...
Click to expand...


lol, like to see an Antec 330 'whip' an Enermax 350 watter.
 
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