Date: Tue, 22 Oct 2013 17:04:06 -0700 From: Charles Swiger <cswiger@mac.com> To: aurfalien <aurfalien@gmail.com> Cc: FreeBSD - <freebsd-questions@freebsd.org> Subject: Re: FreeBSD, Centos and ZFS - SOLVED Message-ID: <852AD883-D21A-4E34-9907-BF78696DE069@mac.com> In-Reply-To: <25C055B9-4A19-46C8-B78E-AC8BD6E00CD9@gmail.com> References: <CBA24BB3-4A57-428C-B342-4BEB678B8D43@gmail.com> <1381600575.18393.33219025.5D7B78D0@webmail.messagingengine.com> <8CA809B3-1692-4760-A63F-9D7451EB49BD@gmail.com> <525D143B.50202@gmail.com> <DF3E552D-D2E6-464C-88EA-7AF34E8329CC@gmail.com> <1382285088.2462.36238881.1AA6BB17@webmail.messagingengine.com> <25C055B9-4A19-46C8-B78E-AC8BD6E00CD9@gmail.com>
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Hi-- On Oct 22, 2013, at 4:40 PM, aurfalien <aurfalien@gmail.com> wrote: > OMG, what a relief... the ~30% diff in performance was due to a BIOS setting, in particular this one; > > Intel Turbo Boost Technology This is Intel's automatic overclocking, which mainly ups the speed on multicore CPUs if some of the cores are idle leaving thermal headroom. You usually want this on for best performance. > Enhanced Intel SpeedStep Tech This is dynamic power management involving lower clock frequencies and usually voltages; it reduces power consumption, but can also reduce performance for some workloads if not properly tuned. Leaving it off for best performance is reasonable. Regards, -- -Chuck
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