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Just how fast can a 2.6GHz Pentium 4 go?
Well I have gotten a 2.6GHz Pentium 4, on the socket 478 with stock cooling, to go as high as 2.94GHz before the system starts to hang. I believe I have the Core voltage set to 1.875v, and I am running windows XP home edition.
the system specs (other than the cpu) are:
-Ram-1gb in four slots
-HDD's-Fujitsu 10gb and Maxtor 10gb
-Mainboard-Asus P4GBX
-Video-Nvidia Geforce (2?) pci card
-Cooling-Stock pentium 4 cooling aparatus and 2 case fans
-PSU-350W Enermax
The cpu is just a standard socket 478 pentium 4 that has a stock speed of 2.667GHz
Has anyone gotten theirs to go any faster?
Comments
10 years ago
64 feet per second, from a third-floor office. Maximum speed without overclocking would be about 200 miles per hour, from a FedEx cargo hold in-flight.
Reply 10 years ago
what about air resistance? that would slow it down a bit, as your average desktop tends to be a fairly slab-sided entity. I'm guessing that slightly below 100mph would be the terminal velocity.
Reply 10 years ago
Nope, I did a simple calculation, and looked up some results. Terminal velocity for a sphere (which is a reasonable approximation to a desktop cube) is 211 mph.
Reply 10 years ago
I'd disagree that a sphere is a reasonable approximation to a desktop cube, but I'm not that happy with 850 kph...
L
Reply 10 years ago
I assumed the box is tumbling randomly, rather than falling with one face presented preferentially. That randomness makes the sphere not unreasonable, I think. Besides, the symmetry makes the calculation easier :-)
Reply 10 years ago
I forgot to root it. 40x40x20 at 10kg was what I went for. shape & area determine drag - what size sphere?
L
Reply 10 years ago
I took a desktop to be about 50 cm average dimension, so a 25 cm radius sphere.
Reply 10 years ago
That gives 6.5 litres doesn't it?
Depend upon the case I guess?
L
Reply 10 years ago
I get 65 liters for a 25 cm radius sphere (15625 * 4p/3 / 1000). I used a density of 1.5 times water, to account for the difference between the plastic and metal stuff, vs. the air spaces, and I used a drag coefficient of 0.5. A bit more research shows that I should probably have used something between 0.8 and 1.0, for a cube falling at an arbitrary orientation.
Reply 10 years ago
Like I said previously, I forgot to root it, but it seems slow if I do?
Watch video - "approaching 320 m/s", "penetration: 40 metres"
L
Reply 10 years ago
I'm pretty sure 211 mph is too high, as the fastest a person can fall is about 210 mph, if they are trying, and a PC has a lower density than a person while being less aerodynamic.
Reply 10 years ago
Um. A PC, especially a modern one, has a substantially higher density than a person (the case is smaller and has less airspace, and the materials inside are all denser than water). Terminal velocity for a "tucked" skydiver, or a freely dropping bullet is about 200 mph.
Reply 10 years ago
You can argue over * or - a mile per hour or two, but it's still gonna hurt with the sudden stop.
Reply 10 years ago
At least the sudden stop from 200 ish mph will be more spectacular than just pushing the processor too far, and letting the smoke out.
Reply 10 years ago
The volume of the average PC is about 23,300 cm3
so the equivalent volume of human has a mass a bit less than 23.3 Kg.
Apparently, the average mass of a PC is between 15 to 30 Kg, depending on the specific case and hardware. I would have said the PC in question is somewhere in the middle of this, so it would probably come down to how much more aerodynamic a human is than a PC, and the altitude.
10 years ago
"I believe I have the Core voltage set to 1.875v" - worries me, as you should know.
How are you over-clocking it?
L
Reply 10 years ago
the mainboards bios lets me adjust the core voltage and frequency if i set it to manual.
i either have it at 1.875 or lower, any higher and the system hangs.
Reply 10 years ago
Do you follow a particular method / procedure? Fiddling with core voltage is something best left unless a person really knows what they're doing - CPUs can die prematurely etc.
Anyway you've squeezed 10% out of it which is something.
(Anyone else)
L
Reply 10 years ago
i think if i want it to go faster i would need better cooling on the cpu, it idles around 60 degrees.
Reply 10 years ago
Idles at 60oC? Take the cooler off clean everything and apply a very-small amount of thermal-compound - doing this could easily knock 20 degrees off (unless your cooler is really awful)
L
Reply 10 years ago
its the same small stock cooler that was on the board when i got it, i cleaned it out before i started putting it together, i think its just a bad cooler, but i cant afford a better one, they just cost way too much for my budget.
Reply 10 years ago
The seating on the CPU may be poor, honestly - redoing that alone (carefully) can make a big difference. There's often too much thermal-paste
L
Reply 10 years ago
theres not too much, maybe not enough... i did use petroleum jelly instead of any thermal paste, I cant afford all of that fancy thermal paste. for a while i "recycled" it from an old stereo.
I think a better cooling system is in order.
Reply 10 years ago
Well there you go "i did use petroleum jelly". Fix that first.
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Reply 10 years ago
lol but i cant!
Reply 10 years ago
lol but i cant!
Reply 10 years ago
who thinks i should try this with a socket 7 cpu? (amd k6-2 or pentium 1, maybe a newer celeron?)
10 years ago
. For maximum practical speed, you'll probably be better off asking on a forum for over-clocking.
. The two main limits I can think of are heat and capacitance. Because of the way most chips are made, you can only take so much heat out before physical stresses become too great. Even if you could get a liquid Hydrogen bath to work, capacitance would still limit how fast you could go. Then there's a limit to how fast silicon, et al, can turn on and off.
. As cheap as computers are nowadays, if I needed more speed, I'd buy a bare-bones, multi-core system and move my HDD, CD/DVD, &c to it.
. More RAM nearly always helps and nearly always gives you the biggest bang for your buck. Bump it up to the maximum.
Reply 10 years ago
well its an extra board...