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To: Monica Detwiler who wrote (168817)	7/29/2002 8:37:32 AM
From: Dan3	Read Replies (2) \| Respond to of 186894

P4 failures Here's part of page 1, there are 13 pages (120+ posts) on the topic: DANGER!!! P4 Overclockers, YOU MUST READ THIS!!!! This is an exerpt from this thread. I test P4 systems... aircooled, peltier cooled, watercooled, and phase-change cooled... As the P4 chips have clock-throttling built into the processors, heat is not a problem to the P4's....however, high voltage to the V-core is. There is a growing database of evidence of P4 cpu's dying from high voltage to the core. Anything over the Intel spec of 1.75 MAX is dangerous. I lost a 2.2 and a 1.6 at 1.95 and 2.0 volts, the interconnects broke down from the voltage after only 2 weeks... both were cooled very well, one in a Vap0, the other peltier cooled. I also lost a 2.4 at only 1.85 volts in three weeks with chilled watercooling. Several sources on the net have also reported failures from high voltages to the P4 core. Intel techs I have spoken to agree that this threat is very real. The small interconnects and gates used in the current P4's are subject to electromigration and oxide breakdown, resulting in a chip which will not boot, or one that will only run at reduced speeds, before dying. Anything over 1.7 Volts is playing with immanent failure.. The main enemy of P4's is NOT heat...it is OVERVOLTING. FT. This makes absolute sense too. The shrinkage of transistor gate lengths results in smaller, more fragile interconnects. High heat or Volts will certainly kill these things. Luckily for CPU throttling, the heat is less of an issue. All you P4 overclockers with high voltage 24/7. What do you think? Spread the Knowledge! [There is] "some degree of natural talent which most people possess but often lack the faith in oneself to let it flourish." -A good man Print Post Dra6oN (Junior Pro) 07/14/02 03:37 AM Re: DANGER!!! P4 Overclockers, YOU MUST READ THIS!!!! Whoa. Thanks good thing i quit ocing :D Print Post waters (Master Onion) 07/14/02 03:38 AM Re: DANGER!!! P4 Overclockers, YOU MUST READ THIS!!!! Pushing the vcore beyond specs is dangerous with any CPU, though. Everyone should know this before clocking or tweaking. Hope I die before I get old. KT133 Score KT133A Test Print Post will_perdikakis (Veteran Pro) 07/14/02 03:48 AM Re: DANGER!!! P4 Overclockers, YOU MUST READ THIS!!!! In reply to: -------------------------------------------------------------------------------- Pushing the vcore beyond specs is dangerous with any CPU, though. Everyone should know this before clocking or tweaking. -------------------------------------------------------------------------------- Absolutely right (as usual). However the reason this seems post-worthy is because with T-Birds the danger voltage was around 2.2v and up. Anything less was relatively safe for a majority of the time. No one really ran the CPUs all day at these volts, but many NW OCers, (myself included) run all day at 1.8v+. Also, I have read many posts lately with a common misconception. People seem to believe that better with better cooling, you can sustain higher voltage. As if it where a linear comparison. If that were true, then infinite cooling, and infinite voltage could give you infinite clock speed. discuss.madonion.com

To: Monica Detwiler who wrote (168817)	7/29/2002 8:40:04 AM
From: Dan3	Read Replies (1) \| Respond to of 186894

More P4 overclocker failures I know most of you getting 3ghz+ are running 2v on the core. I have read many posts of people running over 1.75 burning the cpu. The temps reported were acceptable, but they still made crispy critters from the cpu. Just curious if you guys running over these voltages have had any problems using the vapo boxs? vapochill.com

To: Monica Detwiler who wrote (168817)	7/29/2002 9:09:04 AM
From: Dan3	Respond to of 186894

More indications of P4 thermal problems AMD has about 6% of the server market, while Intel has most of the rest. While there is a 1U 4 processor Athlon server: angstrom.com No one seems to be able to get 4 P4 Xeons in a 1U form factor without losing reliability. In fact, getting even 2 P4's in the form factor that easily supports 4 of the more robust Athlons is causing trouble. And Itanium looks to be flat out hopeless: Thermals hit Intel's dual in the crown Ouch! Eightfold misery too By Mike Magee: Monday 29 July 2002, 09:05 If I had a hammer, I'd hammer in the morning - Leonard Nimoy DESPITE WONDERFUL CPUs, marvellous chipsets and excellent partners, we're still waiting to see many of said Intel partners produce a 1U Pentium 4 DP Xeon machine, unless, that is, you know better. And the eight way market for Xeon using the Pentium4/Foster core is still in the doldrums, except for an IBM machine that uses its own cache technology to produce good results. Again, unless you know better out there. IBM also managed to produce a 2U Pentium 4 DP Xeon but we're still waiting to see Compaq, or HP as it now is, produce the like. Read the rest at: theinquirer.net