Date: Thu, 10 Sep 2009 20:57:32 -0400 From: Pierre-Luc Drouin <pldrouin@pldrouin.net> To: freebsd-stable@freebsd.org Subject: How to enable CPU turbo mode on FreeBSD? Message-ID: <4AA9A07C.4050200@pldrouin.net>
next in thread | raw e-mail | index | archive | help
Hi, I have an overclocked i7 920 CPU for which I have enabled Turbo Mode in the BIOS (21x multiplier). The base clock is set at 190 MHz, so the CPU frequency with Turbo mode activated should be 3990 MHz. However the maximum value FreeBSD amd64 shows for the CPU frequency in dmesg and sysctl is 3790 MHz. How can I enable the Turbo Mode? CPU: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz (3790.52-MHz K8-class CPU) machdep.acpi_timer_freq: 3579545 machdep.tsc_freq: 3790522507 machdep.i8254_freq: 1193182 dev.cpu.0.freq: 349 dev.cpu.0.freq_levels: 2793/130000 2443/113750 2094/97500 1745/81250 1396/65000 1047/48750 698/32500 349/16250 Thanks!
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4AA9A07C.4050200>