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