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Overclockers Top 6GHz With A 3.6GHz-Rated P4
sH4RD writes "The 6GHz barrier has been broken by two guys, a little LN2 (liquid nitrogen for those not as chemistry inclined), and an Intel Pentium 4 (Prescott) 3.60GHz. Check out some icing and some proof of speed. Better yet take a look at how fast it calculates pi. Also be sure to check out the original announcement."
So P4's double clock their ALUs - that means that ALU is shifting at > 12GHz.
Welcome to measuring your operations in picoseconds.
As the AC already said, it's not stable at 6Ghz, from the article:
:)
Not bench stable - just a screenshot record
The CPU powersupply seems to require quite a bit of modding in order to bench past 5.4GHz.
Clock for clock, the final P3 (the Pentium III S) would smoke the original P4 (Willamete) no questions asked. So it's quite possible dual P3/500s could have beaten a 1.5Ghz P4 on many benchmarks.
$2B OR NOT $2B = $FF
The first Pentium 4 CPU was slow compared with a P3 1 GHz. One would belive that a 1.5GHz CPU would beat the last generations 1 GHz CPU, but in many tasks the P3 was faster.
-The P3 pipeline had 12 stages the P4 had 20.
-The P3 Katmai had 512k L2 cache, the P4 had only 256k. I remember some MySQL benchmarks showing a single P3 500 MHz Katmai beating a P4 1400 MHz in some tasks.
So even with all the IDE stuff enabled a Dual P3 could be faster than a P4 in Gentooing.
Melius mori in libertate quam vivere in servitute.
Actually no, It would overheat quite quickly as a vaccuum is a very good insulator (heh some would say almost perfect).
Sorry, teleporters just kill you and then make a copy. A perfect, soul-less copy.
The reason why they run with so little memory is the same why they are using a cheap video card: there is a chance they might kill it. The other more important reason is that they can reach higher FSB clocks with less memory sticks. I fthey had two or more memory sticks they would be able to reach same FSB speeds, an in turn, same CPU clock speeds.
Looks like one of these doodads to me:
c z-booster.html
http://www.xbitlabs.com/articles/memory/display/o
Liquid nitrogen boils at -195.8 degrees C, which is cold enough to freeze propane into a solid (there's a fun experiment for you). Further, liquid nitrogen is not flammable, and presents no hazards other than asphyxiation and freeze damage. Nitrogen already makes up 80% of the air we breathe, so unless one works in an enclosed space with plenty of NL2 boiling off, it's tough to die from asphyxiation.
In other words, LN2 is colder, and won't blow up on you. I've used it for years, and have yet to get hurt by it. A little respect goes a long way.
I wrote a paper on Type I superconductivity (appears in metals when cooled to a few K of zero; ceramics are a totally different beastie) in school and got diverted into reading up on ultracryogenics for a few weeks - apparently at temps that low, you get all sorts of problems like extreme brittleness and differing rates of thermal expansion, the latter being a fairly major issue in designing an ultracryogenic system. There's a good chance the CPU die, wires, and case would all tear away from each other and destroy the thing. Not to mention that lead superconducts at 7.196K; i wonder what resistanceless solder would do to a mobo...
Facts do not cease to exist because they are ignored. - Aldous Huxley
The problem with liquid helium (This made MRI scanners horribly impractical for a LOT of years) is that it has 1/20 the heat capacity of nitrogen, and you have to suck a thousand times the power to get down to helium temperatures compared to nitrogen. There would also be no quantum anomalies with silicon. It can only be compelled to a superconductive state under Extreme pressure.
:)
BTW, which is it... are we mounting it in a vaccuum or under liquid helium