Re: [gentoo-user] Re: Overclocking CPU causes segmentation fault

[Volker Armin Hemmann <volkerarmin@googlemail.com>]

Am 23.01.2013 16:35, schrieb Nikos Chantziaras:
> On 23/01/13 17:09, Nilesh Govindrajan wrote:
>> On Wednesday 23 January 2013 07:52:03 PM IST, Nikos Chantziaras wrote:
>>> [...]
>>> In my experience, most of the time you can overclock.  The issue is
>>> with the user not knowing exactly how to do it.  You need to
>>> understand a few things and how they affect each other.  It's not just
>>> a knob you can turn.
>>
>> That pretty much applies to me. I don't know much about hardware stuff.
>> Regarding your 1 Ghz overclock, you probably have good components in
>> terms of RAM & SMPS.
>> When I bought this rig in 2008, I knew nothing about good components,
>> blindly trusted local vendor... also internet shopping wasn't advanced
>> here.
>> So pretty much substandard components.
>
> The part that's really important is the mainboard.  RAM doesn't
> matter.  In my case, I had pretty basic 800MHz DDR2 RAM.  Raising the
> FSB would bring it above that, so I changed the DRAM ratio to 1:1, and
> the RAM then ran at only 600Mhz.
>
> That was the starting point to rule out RAM problems.  After that, I
> raised FSB but kept the VCore constant until I hit the first
> instabilities.  When that happened, I raised VCore a bit.  Rinse and
> repeat, until the VCore was still below the maximum recommendation by
> Intel.  That happened at 3.4GHz (378MHz FSB * 9 CPU multiplier =
> 3402MHz CPU clock.)  The E6600 CPU I got was an average sample. 
> Others were running it at 3.6GHz (or even higher with water cooling.)
>
> This was a process that took about 3 days to complete (needs a lot of
> stability testing.)  The good thing about those older CPUs was that
> the performance boost I got by OCing wasn't just scaling linearly with
> the CPU frequency.  It was scaling *better* than that, because raising
> the FSB also made the mainboard itself perform better and with lower
> latencies.
>
and here we are - the point where the suspension of disbelief ends.

All you may have gained you threw away with the slower ram - and you are
trying to tell us that your rig was faster?

You do know that with today's CPUs the CPU is not the bottleneck - the
slow as molasses, no speed bump for 10 years ram is.

(just look at the internal clock rate of dram chips - and you realize
that ddr1-3 are pretty much the same crap).