Re: [Xen-users] HTPC + DUAL PC In one

[Austin S Hemmelgarn <ahferroin7@xxxxxxxxx>]

On 07/17/2014 04:51 PM, lee wrote:
> "J. Roeleveld" <joost@xxxxxxxxxxxx> writes:
> 
>> On Thursday, July 17, 2014 02:12:22 PM lee wrote:
>>>>> "Fast", "low power consumption" and "low budget" are 
>> somewhat mutually
>>>>> exclusive, especially when you add several graphics cards.
>>>>
>>>> The old dogma says: "Cheap, fast, reliable - pick any two."
>>>
>>> Cheap and fast?  How would that go together?
>>
>> Easy, take an old Intel 386, overclock it to run at 1Ghz and cool it 
>> using liquid nitrogen. (Has been done)
>>
>> Was reliable, until the coolant ran out....
> 
> I doubt that would be fast or cheap.  Overclocking doesn't add
> features/capabilities.  I never got a CPU to work overclocked, either,
> and I've never seen one working overclocked.
> 
It really depends on what MB and CPU you use.  With the ASUS MB's I've
grow rather fond of, and decent AMD CPU's, it's relatively easy as long
as you invest some time in finding a stable configuration.  In-fact the
system I'm writing this from right now has an FX-8320 (which are rated
at 3.5GHz) overclocked to 4GHz, with the HT's overclocked to 2.4GHz, and
it runs rock-solid with a passive cooling system despite having BOINC
running the processor at near full load 24/7.
> Having the cooling system manufactured would be expensive, and it might
> take some trial and error before you can come up with a flow regulator
> that makes sure not to freeze the CPU so much that it becomes too
> brittle without letting it overheat.  You also need to make sure the
> system shuts down automatically before the coolant runs out.
> 
Becoming brittle isn't really an issue as long as you don't expose it to
any sudden acceleration.
> Add to that the price of the liquid nitrogen --- if you can get any at
> all.  And then think of what precautions you'd have to take for working
> with that kind of coolant ...
> 
Actually, there wouldn't be as many precautions needed as you thing,
fewer in-fact than for example oil-based full-immersion cooling.
> When you've solved all these problems, you need to modify the CPU so it
> can run 64bit software and address reasonable amounts of memory.  Good
> luck with that.
> 
One of my friends actually designed and built a liquid nitrogen based
cooling system for a ridiculously over-clocked Intel P4.  The cooling
system actually used more energy than the rest of the computer combined
(he did a closed loop system with a built-in compressor), but he managed
to get the P4 up to almost 4.2GHz before it started having issues due to
internal noise, but he managed to get benchmarks on it that
out-preformed the quad-CPU UltraSPARC workstation he had at the time for
integer calculations.

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