Pelting the C3

[simon389]

has anybody ever pelted the Cyrix C3 core??? Can it be overclocked??

What an interesting project! Hmmmmm..
Although it probably can't OC very well, it sure would be a unique system!

Yeah. I want to do this.:)

[Penguin4x4]

Stock 1GHz C3 max output = 13W. Should OC good, actually. Not much cache in it. :)

[Lt. Max]

anyone have one?

[Monaco]

I'm trying to get one right now, if anybody has one to sell me. I'm thinking the same thing- a pelt on that sucka should make it really fly :burn:

[hooziewhatsit]

a pelt on one of those would be WAY overkill. Heck, the thing doesn't even require a heatsink, let alone a fan.

it would be interesting though... if you do do it, let us know how it turns out.

[cyberey66]

Hmm, and i have my extra pep66 with pelt, copper plate, all ASed together, with my screamer laying around.... If i can find one for like $10 i'll try. I wouldn't pay more because it will be replacing my celeron 433@540 and i think that is actually a faster chip.

[cyberey66]

Originally posted by hooziewhatsit
a pelt on one of those would be WAY overkill.

Killing it is something I actually would be afraid of. Make sure it is at least folding or running prime 5 all the time to try and keep it from freezing.

[JaY_III]

thier is nothing wrong with freezing a CPU...
condensation is what you need to worry about, and that happens once you get past the dew point and that is well above freezing....
but freezing a CPU can do nothing but help it.

oh and by the way, pelt based topics should be in extreem cooling

[cyberey66]

Originally posted by jay
thier is nothing wrong with freezing a CPU...
condensation is what you need to worry about, and that happens once you get past the dew point and that is well above freezing....
but freezing a CPU can do nothing but help it.

oh and by the way, pelt based topics should be in extreem cooling

I know extreme cold temps can harm CPUs, I just don't know how cold. I would figure mbm has the low temp warning for some reason though.

[The Spyder]

i have like a 20-40w one that im thinking of using :)

[JaY_III]

@The Spyder

20-40 watt Pelt wont be any good unless you are trying to cool a 15-20watt CPU...

pelts need to be able to pump a MIN of 1.5-2.0X the heat output of the part it is cooling. If not, it will do more harm than good.

@satan, you really dont need to worry about a plet getting a CPU so cold taht it harms it....
rember they do make compresors (such as vaporchill) that freeze CPU's.... and even with the best of pelts, i would like to see one get a cpu -40C (as they normally run +40)

[Nico3k]

ive overclocked a 750mhz to 820 WITHOUT a HEATSINK

dont have the money right now to go and get anything else for cooling. it gets unstable after 850... even tho its not really hot



i plan to do some experimenting soon

[cyberey66]

Originally posted by Nico3k
ive overclocked a 750mhz to 820 WITHOUT a HEATSINK

I thought they needed a passive heatsink? So they really run with no heatsink?

[donny_paycheck]

Originally posted by satan


I thought they needed a passive heatsink? So they really run with no heatsink?

They need a passive heatsink. But at 13 watts, any old 40w TEC element would freeze that sucker good.

[arkan]

the newest ones might overclock well they are .13 micro chips like the northwoods and thoroughbred xps they use very low voltage they have small cache and their floating popint units run at half the speed of the rest of the chip ~~~drools as he sees a vapochilled c3 screaming for its life at 2.3 vcore~~~~

[Finken]

Haha.. yeah, the chip needs a passive heatsink and runs at like 0.02V :D

I guess a vapochill and 2.3 Vcore would make some differens :)

[arkan]

i think the stock vcore is actually 1.35 votls by the way u can change the multiplier from inside windows on these cpus with cpuid in the tweaks section

[donny_paycheck]

Worth noting, the socket 370 is on it's way out because it can't handle high clock frequencies too well. There aren't enough signal grounds in it to keep the chips noise free at the higher clock speeds. This is also why the socket 462 will only last so long. Higher clock frequencies necessitate more socket pins so that signal grounds can be intermingled and the signaling kept clean.

Same reason why Intel ditched the socket 423 for the P4 and went to 478 pins.

[strokeside]

arkan, do you mean the C3 cpu's are multiplier unlocked, or that you changed the FSB in Windows?

[cyberey66]

Originally posted by strokeside
arkan, do you mean the C3 cpu's are multiplier unlocked, or that you changed the FSB in Windows?

I believe they are multiplier unlocked. I remember that was one of the selling points of the C3, low wattage, low temps, and no multiplier lock. Still no L2 cache, so they still suck.

[arkan]

yes the c3 processors are multiplier unlocked from the factory the newest c3s do have l2 cache in fact they have 128k l1 cache and 64k l2 cache just like a duron but they lag pittifully in anything dealing with floating point math such as games bc the fpu on these chips runs at 1/2 core speed

[Nico3k]

Originally posted by satan


I thought they needed a passive heatsink? So they really run with no heatsink?

they can run with NO heatsink at all... i can post a pic if u want

[Nico3k]

i agree... even with the C3 overclocked it still acts like a 300mhz celeron :(

[The Spyder]

Originally posted by Penguin4x4
Stock 1GHz C3 max output = 13W. Should OC good, actually. Not much cache in it. :)

Originally posted by Jay
@The Spyder

20-40 watt Pelt wont be any good unless you are trying to cool a 15-20watt CPU...

Umm it should work fine for a 13w CPU- using a 40 or an 80w TEC............. :p

[Nico3k]

hi... since this thread gave me the nerve to take out my C3 again, i went ahead and went OCing with it.
i put the waterblock from my main rig onto the C3 and started OC'ing. I lowered the multiplyer by 1x and then set the fsb to 150 to start with. it booted fine and the temp was around 30C.
i did a little burning in and stuff and it was stable running nicely. the performance was also getting better with the OC.
after getting the fsb to about 158, for some reason the screen was black and white when it booted.
i was thinking wtf, so i rebooted and this time i got no video at all.
i unpluged everything and tried again. no video, no error beeps, nothing.
i thought maybe i set the fsb too high, so i flashed the CMOS.
finally it booted again (in color) and i went ahead and set the fsb to 155. it booted. in color. i checked the temp and it was still 30C.
i was about to restart the computer when the whole thing just died on me. now i have a fried C3 and mobo (possibly?).

im borrowing some parts from a friend and checking what still works

[simon389]

Dude,

Thank stinks. Maybe OCing C3s kill them.

Pelt it and see what happens! :D

[Toysrme]

Well... I currently run 2 game/voice servers on UA dorm for LAN's

PII 350@464 256mb
C3 700@700 256mb

the PII can run almost twicee the server load the C3 can...

the PII runs with a tiny fan under the bed with a 80mm intake.

the C3 runs with an AMD retail heatsink and the only fan is the PSU fan. (was using a P90 heatsink/fan but the fan died and the ehatsink is jus too tiny to cope by the time windows boots the servers)

bought the C3 originaly just out of curiosity... i mean i bought it off ebay for $30 what could be better <g> It's great for the dorm cause i can sleep with it on. unlike this XP2000 which use to be on a dragon orb... was toooooo noisy(btw was running a xp1500+ at the time and it'd stll overheat)

well anywho... no point to this post.

the C3's o/c pretty well. would be funny to see one with a TEC but if you push 40w i'd suspect that you'd bee looking at alot of ICE.

I really can't put into perspective as to how little heat mine puts out. proving a point to a friend down the hall, off came the heeatsink the c3 was underclocked to 500mhz and i held the palm of my hand on the top of the processor. Now it DID get too hot to hold my hand on it, by windows had booted and the servers were utilling at 100%

Last point... my 700mhz benchmarks about what a 450-600 celeron dose... depends on the app.

so what would a 2gig c3 be like?
a 1gig celeron II <g> or udder slowness <g>