On Tuesday 22 January 2013 05:13:21 PM IST, Nikos Chantziaras wrote: > On 22/01/13 13:14, Nilesh Govindrajan wrote: >> On Tuesday 22 January 2013 03:13:01 PM IST, Nikos Chantziaras wrote: >>> On 22/01/13 09:41, Nilesh Govindrajan wrote: >>>> So I have this old E2180 processor and no money as of now to buy a new >>>> rig :P >>>> I'm trying to overclock my CPU using BIOS host clock control and >>>> everything is fine at 2.6 Ghz up to bootloader. >>>> >>>> Kernel segfaults. Any idea why? I'm running pf-kernel 3.7.2 and it >>>> doesn't work with vanilla kernel either. >>>> >>>> Intel MCE is disabled in kernel configuration. >>> >>> When you raise the "host clock", which is the FSB, you are also >>> raising the frequency of your RAM. So make sure you select a lower >>> FSB:DRAM ratio in your BIOS. To begin with, set it to 1:1. >>> >>> Also, if you only have the stock CPU cooler that came with it, you >>> won't be able to actually get a stable overclock. Your CPU's stock >>> frequency is 2GHz. Without a better cooler, you might get it to 2.2 >>> or 2.3 maybe. But 2.6? That's pretty optimistic. I don't think >>> it'll work in the long run, unless you happen to have picked a good >>> chip that can be overclocked without raising the VCore. >>> >>> But first, solve the RAM problem by lowering the FSB:DRAM ratio. >>> >>> >> >> I don't get even 2.1 with the stock cooler. Temperature easily goes >> above 75-80 (spec say high temp is 86) on the prime95 test. Quite easy >> to cook it considering that I'm a Gentoo user :D >> Not really worth that. Thanks for replies. > > It really worth trying *lowering* VCore instead of raising it. If your > chip happens to be very good and deal with this without causing > instabilities, this will result in a big drop of temperatures. I did > this on a C2D CPU in the past. I lowered VCore and raised FSB. I > ended up with a good performance boost *and* lower temperatures. > Unfortunately, not all chips behave the same. It's hit and miss. > > >
Now that sounds like a deal. The normal VCore for my CPU is 1.325V.. -- Nilesh Govindarajan http://nileshgr.com
