From owner-freebsd-stable Sun Jan 9 3:31:21 2000 Delivered-To: freebsd-stable@freebsd.org Received: from gndrsh.dnsmgr.net (GndRsh.dnsmgr.net [198.145.92.4]) by hub.freebsd.org (Postfix) with ESMTP id D39E114D7B for ; Sun, 9 Jan 2000 03:31:12 -0800 (PST) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.9.3/8.9.3) id DAA18738; Sun, 9 Jan 2000 03:31:04 -0800 (PST) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <200001091131.DAA18738@gndrsh.dnsmgr.net> Subject: Re: CPU voltage (was Re: load spike strangeness) In-Reply-To: <20000108223540.A58762@Bushong.NET> from David Bushong at "Jan 8, 2000 10:35:40 pm" To: david@bushong.net (David Bushong) Date: Sun, 9 Jan 2000 03:31:04 -0800 (PST) Cc: rjoseph@nwlink.com (R Joseph Wright), freebsd-stable@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > On Sat, Jan 08, 2000 at 10:03:44PM -0800, R Joseph Wright wrote: > > Awhile back I was having trouble getting through kernel compiles, the > > machine would reboot during the compile. Someone on some newsgroup said > > "are you overclocking?". I checked my settings. No, I wasn't > > overclocking. But my voltage setting looked wrong. It was set at 2.2 > > volts or whatever and I thought it was supposed to be at 2.4. So I > > changed it to 2.4. My problem was solved. I was flying through the > > compiles. Then I was looking through my motherboard manual and realized > > that it was supposed to be set at 2.2 after all. I prefer it the way it > > is though. Do you think there is anything wrong with that? > > > Hmm. lmmon -i produces some scary results: > > Voltages > > Vcore1: +2.781V > Vcore2: +1.469V > + 3.3V: +3.312V > + 5.0V: +4.932V > +12.0V: +12.250V <-- Spec is +/- 5%, so 12 +5% is 13.2, your well within spec > -12.0V: -13.125V <-- Again spec is +-5%, so -12 -5% is -13.2, your in spec, a bit high, but see below about light loaded power supplies, this is also one. > - 5.0V: -5.532V <-- Spec is +-5%, -5 -5% is -5.5v, your technically slightly out of spec, but -5V is natorious for being out of spec, and about the only thing that uses it any more in a PC is some of the RS-232 drivers. The reason it is often above spec is that there is no load on it any more and most power supplies have a minimum load requirement of 100mA to regulate correctly (most low current outputs on PC power supplies are down with low cost linear regulators that need a minium 10% of rated current load placed on them before they well regulate correctly). -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message